JP2020083968A - Fuel oil composition for external-combustion engine and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To show excellent low temperature fluidity even in a cold region in a severe cold season, and to show excellent combustibility even in an external combustion engine equipped with a hydraulic spray type burner having a small rated combustion amount and a low spray hydraulic pressure. Provided is a fuel oil composition for an external combustion engine, which is capable of more stable supply with a high yield and can contribute to improvement of fuel efficiency by having a higher calorific value. SOLUTION: The following (1) to (6) contain a heavy kerosene distillate having a specific property, an aromatic hydrocarbon oil having a specific property at a specific content, and an antioxidant. ), That is, (1) 95% by volume distillation temperature is 271.0 ° C or higher and 300.0 ° C or lower, (2) initial distillation point is 140.0 ° C or higher, and (3) ignition point is 40.0 ° C or higher. Satisfaction with (4) sulfur content of 3% by mass or more and 10% by mass or less, (5) clouding point of -20.0 ° C or less, and (6) total calorific value of 37,000 (kJ / L) or more. A fuel oil composition for an external combustion machine and a method for producing the same. [Selection diagram] None

Description

The present invention relates to a fuel oil composition for an external combustion machine and a method for producing the same.

As a fuel oil composition for an external combustion machine such as a boiler, a hot air heater, an industrial furnace, etc., mainly kerosene (JIS K 2203), A heavy oil (JIS K 2205 type 1 heavy oil) and C heavy oil (JIS K 2205) are used. 3 types of heavy oil) are used.

Kerosene has a very low content of sulfur, nitrogen and residual carbon, and has a characteristic that the environmental load due to combustion is small. In addition, because of its excellent low-temperature fluidity, it has excellent combustibility even when used in an external combustion machine equipped with a hydraulic spray burner with a low rated combustion amount and low spray hydraulic pressure in cold regions during the severe cold season. Demonstrate. However, in cold regions in winter, kerosene demand for indoor heating and the like is high, and special consideration is required for stable supply.
The heavy fuel oil A is generally excellent in supply stability and has an advantage that the calorific value is higher than that of kerosene. However, the heavy fuel oil A may require consideration in equipment and the like in order to prevent filter clogging due to deposition of wax in the severe cold season in cold regions. Further, when the heavy fuel oil A is used for an external combustion machine equipped with a hydraulic spray burner having a small rated combustion amount and a low spray hydraulic pressure, it is necessary to improve the combustibility.
C heavy oil has a higher heating value than A heavy oil. However, since it has a high viscosity, it requires heating equipment at the time of use and is inconvenient to handle. Further, since C heavy oil has a low combustibility, it cannot be used in an external combustion machine equipped with a hydraulic spray burner having a low rated combustion amount and a low spray hydraulic pressure, and has a high sulfur content, a nitrogen content, and a residual carbon content, It has a drawback that the environmental load is large.

With the aim of contributing to a stable supply of the fuel oil composition for an external combustion engine in winter, the present inventors have shown excellent stability in long-term storage and were excellent even in cold regions in the severe cold season. Fuel oil composition for external combustion machines that exhibits low temperature fluidity, excellent combustion characteristics even in external combustion machines equipped with a hydraulic spray burner with a low rated combustion amount and low spray oil pressure, and is obtained with high yield Has been proposed (see Patent Documents 1 to 3).

JP, 2004-182744, A JP 2004-182745 A JP, 2017-114948, A

However, with further stabilization of the supply of the fuel oil composition for an external combustion machine particularly in winter, while improvement in fuel consumption due to an increase in calorific value has been desired, in the fuel oil composition described in the above Patent Document, It is not possible to respond sufficiently.

Therefore, the present invention exhibits excellent low-temperature fluidity even in cold regions in the severe cold season, and exhibits excellent combustibility even in an external combustion machine equipped with a hydraulic atomization burner with a low rated combustion amount and low atomization hydraulic pressure. Furthermore, it is an object of the present invention to provide a fuel oil composition for an external combustion machine, which enables stable supply with a high yield and has a high calorific value, which can contribute to improvement in fuel consumption.

The present inventors have made earnest studies in view of the above problems, and have found that the following invention can solve the problems. That is, the present invention provides a fuel oil composition for an external combustion machine having the following constitution and a method for producing the same.

[1] A heavy kerosene fraction containing all of the following (a ₁ ) to (e ₁ ) containing 90.0% by volume or more of a straight-cut fraction obtained by atmospheric distillation of crude oil and hydrodesulfurized. And an aromatic hydrocarbon oil satisfying all of the following (a ₂ ) to (f ₂ ) and an antioxidant, and the content of the aromatic hydrocarbon oil based on the total amount of the composition. Is 3.0% by volume or more and 23.0% by volume or less, the content of the antioxidant based on the total amount of the composition is 20 mass ppm or more and 100 mass ppm or less, and any of the following (1) to (6) A fuel oil composition for an external combustion machine that also satisfies the requirements.
(A ₁ ) 95% by volume distillation temperature is 271.0°C or higher and 300.0°C or lower (b ₁ ) Initial boiling point is 140.0°C or higher (c ₁ ) Flash point is 40.0°C or higher (d ₁ ) Sulfur content is 3 mass ppm or more and 10 mass ppm or less (e ₁ ) Cloud point is −20.0° C. or less (a ₂ ) Aromatic content is 99.0 vol% or more (b ₂ ) Sulfur content Is 0.01 mass% or less (c ₂ ) Cloud point is −50.0° C. or less (d ₂ ) Kinematic viscosity at 30° C. is 1.600 mm ² /s or less (e ₂ ) Density at 15° C. is 0.9000 g/ cm ³ or higher (f ₂ ) flash point is 50.0° C. or higher (1) 95% by volume distillation temperature is 271.0° C. or higher and 300.0° C. or lower (2) initial boiling point is 140.0° C. or higher (3) Flash point is 40.0°C or higher (4) Sulfur content is 3 mass ppm or higher and 10 mass ppm or lower (5) Cloud point is -20.0 or lower (6) Total calorific value is 37,000 (kJ/L) [2] Heavy kerosene containing all of the following (a ₁ ) to (e ₁ ) containing 90.0% by volume or more of a straight-cut fraction obtained by atmospheric distillation of crude oil and hydrodesulfurized. The content of the fraction, the aromatic hydrocarbon oil satisfying all of the following (a ₂ ) to (f ₂ ) and the antioxidant is 3 based on the total amount of the composition of the aromatic hydrocarbon oil. 0.0% by volume or more and 23.0% by volume or less, and blending so that the content of the antioxidant based on the total amount of the composition is 20 mass ppm or more and 100 mass ppm or less, all of the following (1) to (6) A method for producing a satisfactory fuel oil composition for an external combustion machine.
(A ₁ ) 95% by volume distillation temperature is 271.0°C or higher and 300.0°C or lower (b ₁ ) Initial boiling point is 140.0°C or higher (c ₁ ) Flash point is 40.0°C or higher (d ₁ ) Sulfur content is 3 mass ppm or more and 10 mass ppm or less (e ₁ ) Cloud point is −20.0° C. or less (a ₂ ) Aromatic content is 99.0 vol% or more (b ₂ ) Sulfur content Is 0.01 mass% or less (c ₂ ) Cloud point is −50.0° C. or less (d ₂ ) Kinematic viscosity at 30° C. is 1.600 mm ² /s or less (e ₂ ) Density at 15° C. is 0.9000 g/ cm ³ or higher (f ₂ ) flash point is 50.0° C. or higher (1) 95% by volume distillation temperature is 271.0° C. or higher and 300.0° C. or lower (2) initial boiling point is 140.0° C. or higher (3) Flash point is 40.0°C or more (4) Sulfur content is 3 mass ppm or more and 10 mass ppm or less (5) Cloud point is -20.0°C or less (6) Total calorific value is 37,000 (kJ/L) )that's all

EFFECTS OF THE INVENTION According to the present invention, excellent low temperature fluidity is exhibited even in a cold region in the severe cold season, and excellent combustibility is also exhibited in an external combustion machine equipped with a hydraulic atomization burner having a low rated combustion amount and a low atomization hydraulic pressure. Further, it is possible to provide a fuel oil composition for an external combustion machine, which enables stable supply with a high yield and has a high calorific value, which can contribute to improvement in fuel consumption.

Hereinafter, a fuel oil composition for an external combustion machine according to an embodiment of the present invention (hereinafter, simply referred to as “the present embodiment”) and a method for producing the same will be specifically described. In the present specification, the numerical values relating to "below", "greater than or equal to" and "to" relating to the description of numerical ranges are numerical values that can be arbitrarily combined, and the numerical values in Examples are used as upper limit values or lower limit values. It is a numerical value to be obtained.

[Fuel oil composition for external combustion machine]
The fuel oil composition for an external combustion machine according to the present embodiment is a heavy kerosene fraction having specific properties, containing 90.0% by volume or more of a fraction obtained by hydrodesulfurizing a straight distillation fraction obtained by atmospheric distillation of crude oil. Content, an aromatic hydrocarbon oil having specific properties, and an antioxidant, and the content of the aromatic hydrocarbon oil based on the total amount of the composition is 3% by volume or more and 23% by volume or less. The fuel oil composition has a total content of the antioxidant of 20 mass ppm or more and 100 mass ppm or less, and satisfies all of the following (1) to (6).
(1) 95% by volume distillation temperature is 271.0°C or higher and 300.0°C or lower (2) Initial boiling point is 140.0°C or higher (3) Flash point is 40.0°C or higher (4) Sulfur content Is 3 mass ppm or more and 10 mass ppm or less (5) Cloud point is −20.0° C. or less (6) Total calorific value is 37,000 (kJ/L) or more

(Composition and Properties of Fuel Oil Composition for External Combustor)
The fuel oil composition for external combustion machines of the present embodiment satisfies all of the compositions and properties defined in the following (1) to (6).
(1) 95% by volume distillation temperature The 95% by volume distillation temperature of the fuel oil composition for an external combustion machine of the present embodiment is 271.0°C or higher and 300.0°C or lower. If the 95% by volume distillation temperature is not within the above range, excellent yield cannot be obtained. If the 95% by volume distillation temperature of the fuel oil composition for external combustion machines is 271.0° C. or higher, it will be higher than the 95% by volume distillation temperature of kerosene (270° C. or lower). Since it is wider than the boiling point range, excellent yield can be obtained. The 95% by volume distillation temperature of the fuel oil composition for an external combustion machine of the present embodiment depends on the 95% by volume distillation temperature of the distillate that is a constituent component. In this embodiment, the 95% by volume distillation temperature is 271.0° C. or higher and 300.0° C. or lower, which is wider than the boiling point range of kerosene, and the straight-cut fraction whose yield from crude oil is higher than that of kerosene is hydrogenated. By using the heavy kerosene fraction containing the desulfurized fraction of 90.0% by volume or more as an essential component, as a result, it becomes possible to increase the yield of the fuel oil composition for external combustion machines of the present embodiment. It was
From the viewpoint of improving the yield, the 95% by volume distillation temperature is preferably 273.0°C or higher, more preferably 275.0°C or higher, and the upper limit is preferably 290.0°C or lower, more preferably 285. It is 0°C or lower.
In the present specification, the 95% by volume distillation temperature, and the initial boiling point and end point described below are values measured according to JIS K2254: 1998 (petroleum products-distillation test method-).

(2) Initial boiling point The initial boiling point of the fuel oil composition for an external combustion machine of the present embodiment is 140.0°C or higher. If the initial boiling point is outside the above range, the handling safety will decrease. From the viewpoint of improvement in handling safety, it is preferably 143.0° C. or higher, more preferably 145.0° C. or higher, and the upper limit is preferably 160.0° C. or lower from the viewpoint of improving the yield. Yes, and more preferably 155.0°C or lower.

(3) Flash point The flash point of the fuel oil composition for an external combustion machine of the present embodiment is 40.0°C or higher. If the flash point is not higher than 40.0°C, the handling safety will be reduced. The flash point is preferably 42.0° C. or higher, more preferably 45.0° C. or higher, still more preferably 48.0° C. or higher, from the viewpoint of improving safety in handling.
In the present specification, the flash point is a value measured according to JIS K 2265-1:2007 (Crude oil and petroleum products-Flash point test method-Part 1: Tag sealing method).

(4) Sulfur content The sulfur content of the fuel oil composition for external combustion machines of this embodiment is 3 mass ppm or more and 10 mass ppm or less. If the sulfur content is not within the above range, it becomes difficult to maintain storage stability, and corrosion may occur due to an increase in sulfur oxides in the exhaust gas. From the viewpoint of improving the storage stability and suppressing the occurrence of corrosion, the sulfur content is preferably 8.0 mass ppm or less, more preferably 6.0 mass ppm or less, and the lower limit is preferably 4.0. Mass ppm or more.
In the present specification, the sulfur content is a value measured according to JIS K2541-7:2003 (Crude oil and petroleum products-Sulfur content test method-Part 7: Wavelength dispersion fluorescent X-ray method).

(5) Cloud Point The cloud point of the fuel oil composition for an external combustion machine of the present embodiment is −20.0° C. or lower. If the cloud point is not within the above range, the low-temperature fluidity is lowered, the filter wax is apt to be clogged with the deposited wax, and it is necessary to cope with equipment such as heat retention. From the viewpoint of suppressing filter clogging by improving low-temperature fluidity in the severe winter of cold regions and eliminating the need for equipment such as heat retention, it is preferably −22.0° C. or lower, more preferably −23.0° C. or lower. The lower limit is not particularly limited, but is usually −40.0° C. or higher.
In the present specification, the cloud point is a value measured according to JIS K2269:1987 (pour point and cloud point test method for crude oil and petroleum products).

(6) Total calorific value The total calorific value of the fuel oil composition for an external combustion machine of the present embodiment is 37,000 (kJ/L) or more. If the total calorific value is not within the above range, the fuel efficiency is lowered and it becomes difficult to improve the fuel efficiency. From the viewpoint of further improving fuel efficiency, the total calorific value is 37,100 (kJ/L) or more, and more preferably 37,200 (kJ/L) or more.
In the present specification, the total calorific value is measured and estimated according to JIS K2279:2003 (crude oil and petroleum products-testing method for calorific value and estimating method by calculation-) ("6. total calorific value estimating method, 6. 3 e) Estimated by the calculation formula for crude oil, kerosene, light oil, A heavy oil and B heavy oil specified in 1)).

Further, the fuel oil composition for an internal combustion engine of the present embodiment may further satisfy at least one selected from the following (7) to (12) in addition to the properties and composition of the above (1) to (6). It is particularly preferable that all of the following (7) to (12) are satisfied.
(7) Petroleum Product Reaction Test It is preferable that the fuel oil composition for an external combustion machine of this embodiment has a neutral petroleum product-reaction test result according to JIS K 2252:1998. The neutrality prevents corrosion of various devices with which the fuel oil composition for an external combustion machine of the present embodiment comes into contact, for example, fuel oil tanks, pipes, diesel engines, and auxiliary equipment such as equipped pumps. Therefore, the stable operation of the external combustion machine can be performed more easily.

(8) Moisture Content The moisture content of the fuel oil composition for an external combustion machine of the present embodiment is preferably 0.01% by volume or less. When the water content is within the above range, deterioration of storage stability (sludge formation due to an emulsion of asphaltene and water), freezing and the like can be suppressed, and clogging of the filter can be prevented.
In the present specification, the water content is a value measured according to JIS K 2275-3:2015 (Crude oil and petroleum products-Method of determining water-Part 3: Karl Fischer coulometric titration method).

(9) Ash Content The ash content of the fuel oil composition for an external combustion machine of the present embodiment is preferably 0.001 mass% or less. When the amount of ash is within the above range, wear of the burner tip can be further suppressed, and the environmental load due to exhaust gas can be reduced.
In the present specification, the amount of ash is a value measured according to JIS K 2272:1998 (Crude oil and petroleum products-Test method for ash and sulfated ash-).

(10) Kinematic viscosity at 30° C. The kinematic viscosity of the fuel oil composition for an external combustion machine of the present embodiment at 30° C. is preferably 1.300 mm ² /s or more, more preferably 1.350 mm ² /s or more, It is preferably 1.375 mm ² /s or more, and the upper limit is preferably 1.700 mm ² /s or less, more preferably 1.600 mm ² /s or less, and further preferably 1.500 mm ² /s or less. When the kinematic viscosity at 30° C. is within the above range, the fuel oil composition for an external combustion machine can be easily adapted to the specification range of various devices such as a pump and a flow meter, and combustibility is improved.
In the present specification, the kinematic viscosity at 30° C. is a value measured according to JIS K 2283:2000 (Kinematic viscosity test method for crude oil and petroleum products).

(11) Density at 15° C. The density of the fuel oil composition for an external combustion machine of the present embodiment at 15° C. is preferably 0.8000 g/cm ³ or more, more preferably 0.8020 g/cm ³ or more, and further preferably It is 0.8050 g/cm ³ or more, more preferably 0.8100 g/cm ³ or more, and the upper limit is preferably 0.8200 g/cm ³ or less, more preferably 0.8190 g/cm ³ or less, and further preferably 0.1. It is 8150 g/cm ³ or less. When the density at 15°C is within the above range, the yield is improved and the flammability is also improved.
In the present specification, the density at 15°C is a value measured according to JIS K 2249-1:2011 (crude oil and petroleum products-Determination of density-Part 1: Vibration method).

(12) Composition The saturated content based on the total amount of the composition of the fuel oil composition for an external combustion machine of the present embodiment is preferably 60.0% by volume or more, more preferably 63.0% by volume or more, and further preferably 65. It is 0% by volume or more, and the upper limit is preferably 85.0% by volume or less, more preferably 80.0% by volume or less, and further preferably 75.0% by volume or less. The olefin content is preferably 0.3% by volume or less, more preferably 0.1% by volume or less. The 1-ring aromatic content is preferably 35.0% by volume or less, more preferably 31.0% by volume or less, further preferably 28.5% by volume or less, and the lower limit is preferably 18.0% by volume or more, It is preferably 21.5% by volume or more. The bicyclic aromatic content is preferably 5.0% by volume or less, more preferably 3.0% by volume or less, further preferably 2.0% by volume or less, and there is no particular lower limit, but usually 1. It is 0% by volume or more. The tricyclic aromatic content is preferably 1.5% by volume or less, more preferably 1.3% by volume or less, further preferably 0.9% by volume or less, and there is no particular lower limit, but it is usually 0%. It is at least 4% by volume. When the content of these components is within the above range, the combustibility is particularly improved.
In the present specification, the above-mentioned saturated component, olefin component, 1-ring aromatic component, 2-ring aromatic component and 3-ring aromatic component are petroleum products-hydrocarbon type defined in JPI-5S-49-2007. Test method-A value measured by a high performance liquid chromatography method (High Performance Liquid Chromatography method).

(Heavy kerosene fraction)
The fuel oil composition for an external combustion machine of the present embodiment is a distillate fraction obtained by hydrodesulfurizing a straight distillation fraction obtained by atmospheric distillation of crude oil (hereinafter sometimes referred to as "hydrodesulfurization fraction"). the containing 90.0% by volume or more, containing heavy kerosene fraction that satisfies both of the following _{(a 1) ~ (e 1} ). If the above heavy kerosene fraction is not contained, excellent low-temperature fluidity and combustibility cannot be obtained, further, stable supply due to high yield cannot be achieved, and fuel consumption can be improved due to high calorific value. No form of external combustion engine fuel oil composition is obtained.
(A ₁ ) 95% by volume distillation temperature is 271.0°C or higher and 300.0°C or lower (b ₁ ) Initial boiling point is 140.0°C or higher (c ₁ ) Flash point is 40.0°C or higher (d ₁ ) Sulfur content is 3 mass ppm or more and 10 mass ppm or less (e ₁ ) cloud point is −20.0° C. or less

The hydrodesulfurization conditions at the time of hydrodesulfurizing the above straight distillation fraction to obtain a hydrodesulfurization fraction are as follows, for example. The hydrodesulfurization fraction can be obtained more easily by using the following hydrodesulfurization conditions.
Reaction temperature: 250° C. or higher and 390° C. or lower, preferably 300° C. or higher and 350° C. or lower Hydrogen partial pressure; 1.0 MPa or higher and 10.0 MPa or lower, preferably 2.0 MPa or higher and 5.0 MPa or lower Hydrogen/feed oil ratio: 50 Nm ³ / kL above 500 Nm ³ / kL or less, preferably 100 Nm ³ / kL or 300 Nm ³ / kL or less,
Liquid hourly space velocity; 0.1 hr ^-1 or more 10.0Hr ^-1 or less, preferably 1.0 hr ^-1 or more 8.0Hr ^-1 or less

(A ₁ ) 95% by volume distillation temperature The 95% by volume distillation temperature of the heavy kerosene fraction used in this embodiment is 271.0°C or higher and 300.0°C or lower. As described above, by using a heavy kerosene fraction having a 95% by volume distillation temperature in the above range and a boiling point range wider than that of kerosene, as a result, the yield of the fuel oil composition for an external combustion machine of the present embodiment is obtained. Can be improved. From the viewpoint of improving the yield, the 95% by volume distillation temperature is preferably 273.0°C or higher, more preferably 275.0°C or higher, and the upper limit is preferably 290.0°C or lower, more preferably 280. It is 0°C or lower.

(B ₁ ) Initial boiling point The initial boiling point of the heavy kerosene fraction used in this embodiment is 140.0°C or higher. If the initial boiling point is outside the above range, the handling safety will decrease. From the viewpoint of improvement in handling safety, it is preferably 143.0° C. or higher, more preferably 145.0° C. or higher, and the upper limit is preferably 160.0° C. or lower from the viewpoint of improving the yield. Yes, and more preferably 155.0°C or lower.

(C ₁ ) Flash Point The heavy kerosene fraction used in this embodiment has a flash point of 40.0° C. or higher. If the flash point is not within the above range, the handling safety will decrease. From the viewpoint of improvement in handling safety, the flash point is preferably 42.0°C or higher, more preferably 45.0°C or higher.

(D ₁ ) Sulfur content The sulfur content of the heavy kerosene fraction used in the present embodiment is 3 mass ppm or more and 10 mass ppm or less. If the sulfur content is not within the above range, it becomes difficult to maintain storage stability, and corrosion may occur due to an increase in sulfur oxides in the exhaust gas. From the viewpoint of improving the storage stability and suppressing the occurrence of corrosion, the sulfur content is preferably 8 mass ppm or less, more preferably 6 mass ppm or less, and the lower limit is preferably 4 mass ppm or more.

(E ₁ ) Cloud Point The cloud point of the heavy kerosene fraction used in this embodiment is −20.0° C. or lower. If the cloud point is not within the above range, the low-temperature fluidity is lowered, the filter wax is apt to be clogged with the deposited wax, and it is necessary to cope with equipment such as heat retention. From the viewpoint of suppressing filter clogging by improving low-temperature fluidity in cold regions in cold regions and eliminating the need for equipment such as heat retention, the temperature is preferably −21.0° C. or lower, and the lower limit is not particularly limited. However, it is usually −40.0° C. or higher.

Further, the heavy kerosene fraction used in the present embodiment is at least one selected from the following (f ₁ ) to (h ₁ ) in addition to the properties and composition of the above (a ₁ ) to (e ₁ ). It is preferable that all of the following (f ₁ ) to (h ₁ ) are satisfied.

(F ₁ ) Kinematic viscosity at 30° C. The kinematic viscosity of the heavy kerosene fraction used in the present embodiment at 30° C. is preferably 1.300 mm ² /s or more, more preferably 1.400 mm ² /s or more, It is preferably 1.500 mm ² /s or more, and the upper limit is preferably 1.700 mm ² /s or less, more preferably 1.600 mm ² /s or less, still more preferably 1.550 mm ² /s or less. When the kinematic viscosity at 30° C. is within the above range, the fuel oil composition for an external combustion machine can be easily adapted to the specification range of various devices such as a pump and a flow meter, and combustibility is improved.

(G ₁ ) Density at 15° C. The heavy kerosene fraction used in the present embodiment has a density at 15° C. of preferably 0.7890 g/cm ³ or more, more preferably 0.7920 g/cm ³ or more, and further preferably It is 0.7940 g/cm ³ or more, and the upper limit is preferably 0.7980 g/cm ³ or less, more preferably 0.7970 g/cm ³ or less. When the density at 15°C is within the above range, the yield is improved and the flammability is also improved.

(H ₁ ) Composition The saturated content based on the total amount of the composition of the heavy kerosene fraction used in this embodiment is preferably 70.0% by volume or more, more preferably 75.0% by volume or more, and further preferably 78. It is 0% by volume or more, and the upper limit is preferably 90.0% by volume or less, more preferably 85.0% by volume or less, and further preferably 83.0% by volume or less. The olefin content is preferably 0.3% by volume or less, more preferably 0.1% by volume or less. The 1-ring aromatic content is preferably 25.0% by volume or less, more preferably 23.0% by volume or less, further preferably 20.0% by volume or less, and the 2-ring aromatic content is preferably 3.0% by volume. Or less, more preferably 2.0% by volume or less, further preferably 1.0% by volume or less, and the tricyclic aromatic content is preferably 1.0% by volume or less, more preferably 0.8% by volume or less, It is preferably 0.5% by volume or less. When the content of these components is within the above range, the combustibility is particularly improved.

(Content of hydrodesulfurization fraction in heavy kerosene fraction)
The content of hydrodesulfurization fraction in the heavy kerosene fraction is 90.0% by volume or more. If the content of the hydrodesulfurization fraction is not within the above range, excellent yield cannot be obtained. In consideration of obtaining a higher yield, the content of hydrodesulfurization fraction in the heavy kerosene fraction is preferably 92.0% by volume or more, more preferably 95.0% by volume or more, and 100 More preferably, it is 0.0% by volume, that is, the total amount is a hydrodesulfurization fraction.

(Other fractions that can be contained in the heavy kerosene fraction)
In the present embodiment, the heavy kerosene fraction may contain other fractions in addition to the hydrodesulfurization fraction. Other fractions that can be used in combination with the hydrodesulfurization fraction include, for example, the following fractions.
(I) A fraction obtained by hydrocracking a light oil fraction obtained by distilling crude oil under atmospheric pressure using an atmospheric distillation apparatus (also referred to as "direct distillation gas oil fraction"). (ii) Crude oil is subjected to atmospheric distillation using an atmospheric distillation apparatus. Residual fraction obtained by pressure distillation (also referred to as "normal pressure distillation residual oil") is subjected to vacuum distillation with a vacuum distillation apparatus to obtain a gas oil fraction (also referred to as "vacuum gas oil fraction") is hydrocracked. Distillate (iii) A gas oil fraction (“cracked gas oil fraction” obtained by fluid catalytic cracking of a residue fraction obtained by desulfurizing an atmospheric distillation residue oil and/or a vacuum distillation residue oil by a direct desulfurization device. (Also referred to as ".") is obtained by hydrocracking (iv) a gas oil fraction obtained by desulfurizing an atmospheric distillation residue oil and/or a vacuum distillation residue oil directly with a desulfurization device ("direct degassed oil fraction"). (Also referred to as "min.") in the distillate (v) obtained in a petrochemical plant having a sulfur content of 10 mass ppm or less and a boiling range of 140.0. Fraction above ℃ and below 320.0 ℃

(Content of heavy kerosene fraction)
The content of the heavy kerosene fraction based on the total amount of the composition is preferably 77.0% by volume or more, more preferably 80.0% by volume or more, further preferably 83.0% by volume or more, and the upper limit is preferably It is 97.0% by volume or less, more preferably 95.0% by volume or less, and further preferably 92.0% by volume or less. If the content of the heavy kerosene fraction is within the above range, the low temperature fluidity is improved, the combustibility is improved, the rated combustion amount is small, and the external combustion machine equipped with a hydraulic spray burner with a low spray oil pressure is installed. Is more suitable as the fuel oil composition, the more stable supply is possible due to the high yield, and the higher calorific value can contribute to the improvement of fuel efficiency.

(Aromatic hydrocarbon oil)
Outer燃機fuel oil composition of the present embodiment, the following (a _{2) ~} an aromatic hydrocarbon oil that satisfies both the (f _2), 3.0% by volume content of the total amount of the composition The content is 23.0% by volume or less. If the aromatic hydrocarbon oil is not contained in the above content, excellent low temperature fluidity and flammability cannot be obtained, and further stable supply due to high yield cannot be achieved, and fuel consumption improvement due to high calorific value can be achieved. The achievable fuel oil composition for an external combustion machine of this embodiment cannot be obtained.
(A ₂ ) Aromatic content is 99.0% by volume or more (b ₂ ) Sulfur content is 0.01% by mass or less (c ₂ ) Cloud point is −50.0° C. or less (d ₂ ) 30° C. Kinematic viscosity is 1.600 mm ² /s or less (e ₂ ) Density at 15° C. is 0.9000 g/cm ³ or more (f ₂ ) Flash point is 50.0° C. or more

(A ₂ ) Aromatic content The aromatic content of the aromatic hydrocarbon oil used in the present embodiment is 99.0% by volume or more. Here, the aromatic content is the total content of 1-ring aromatic content, 2-ring aromatic content, and 3- or more-ring aromatic content. If the aromatic content is not within the above range, excellent flammability cannot be obtained. From the viewpoint of obtaining more excellent combustibility, the aromatic content is preferably 99.5% by volume or more, more preferably 99.9% by volume or more.
In addition, the content of aromatics having 3 or more rings in the above aromatic content is preferably 5.0% by volume or less, and more preferably 4.5% by volume or less. When the content of aromatic components having 3 or more rings is within the above range, more excellent flammability can be obtained.

(B ₂ ) Sulfur content The aromatic hydrocarbon oil used in the present embodiment has a sulfur content of 0.01 mass% or less (100 mass ppm or less). If the sulfur content is not 0.01% by mass or less, corrosion may occur due to an increase in sulfur oxides in the exhaust gas. From the viewpoint of improving storage stability and suppressing the occurrence of corrosion, the sulfur content of the aromatic hydrocarbon oil is preferably 10 mass ppm or less, more preferably 1 mass ppm or less.

(C ₂ ) Cloud Point The cloud point of the aromatic hydrocarbon oil used in this embodiment is -50.0°C or lower. If the cloud point is not within the above range, the low-temperature fluidity is lowered, the filter wax is apt to be clogged with the deposited wax, and it is necessary to cope with equipment such as heat retention.

(D ₂ ) Kinematic viscosity at 30°C The kinematic viscosity of the aromatic hydrocarbon oil used in the present embodiment at 30°C is 1.600 mm ² /s or less. If the kinematic viscosity at 30° C. is not within the above range, excellent combustibility cannot be obtained, and it becomes difficult to adapt the fuel oil composition for external combustion machines to the specification range of various devices such as pumps and flow meters. From the viewpoint of improving the combustibility and making it easier to adapt the fuel oil composition for external combustion machines to the specification range of various devices such as pumps and flow meters, the kinematic viscosity of the aromatic hydrocarbon oil at 30° C. is preferably Is 1.300 mm ² /s or less, more preferably 1.200 mm ² /s or less, further preferably 1.100 mm ² /s or less, and the lower limit is preferably 1.000 mm ² /s or more.

(E ₂ ) Density at 15°C The density of the aromatic hydrocarbon oil used in the present embodiment at 15°C is 0.9000 g/cm ³ or more. If the density at 15° C. is not within the above range, the effect of improving fuel efficiency by increasing the heat generation amount cannot be obtained. From the viewpoint of improving fuel efficiency and combustibility, the density of the aromatic hydrocarbon oil at 15° C. is preferably 0.9010 g/cm ³ or more, and the upper limit is preferably 0.9500 g/cm ³ or less. is there.

(F ₂ ) Flash Point The flash point of the aromatic hydrocarbon oil used in this embodiment is 50.0°C or higher. If the flash point is not within the above range, the handling safety will decrease. From the viewpoint of improvement in handling safety, the flash point is preferably 52.0°C or higher.

Further, the heavy kerosene fraction used in the present embodiment is at least one selected from the following (g ₂ ) to (i ₂ ) in addition to the properties and compositions of (a ₂ ) to (f ₂ ) above. It is preferable that all of the following (g ₂ ) to (i ₂ ) are satisfied.

(G ₂ ) Initial boiling point The aromatic hydrocarbon oil used in the present embodiment preferably has an initial boiling point of 140.0° C. or higher, more preferably 150.0° C. or higher from the viewpoint of improving handling safety. ℃ or more, more preferably 160.0 ℃ or more, the upper limit is preferably 170.0 ℃ or less, more preferably 165.0 ℃ or less, from the viewpoint of improving the yield.

(H ₂ ) Endpoint The endpoint of the aromatic hydrocarbon oil used in the present embodiment is preferably 290.0° C. or higher, more preferably 300.0° C. or higher, and further preferably 310 from the viewpoint of improving the yield. In consideration of improvement of combustibility, the upper limit is preferably 350.0°C or lower, more preferably 330.0°C or lower, still more preferably 320.0°C or lower.

(I ₂ ) Composition The aromatic component having 9 carbon atoms based on the total amount of the composition of the aromatic hydrocarbon oil used in the present embodiment is preferably 50.0% by volume or more from the viewpoint of obtaining more excellent combustibility. , More preferably 55.0% by volume or more, further preferably 60.0% by volume or more, and the upper limit is preferably 70.0% by volume or less, more preferably 68.0% by volume or less, further preferably 65.0% by volume. Volume% or less. The aromatic component having 10 carbon atoms is preferably 20.0% by volume or more, more preferably 25.0% by volume or more, further preferably 30.0% by volume or more, from the viewpoint of obtaining more excellent combustibility. The upper limit is preferably 40.0% by volume or less, more preferably 38.0% by volume or less, and further preferably 35.0% by volume or less. The aromatic component having 11 or more carbon atoms is preferably 10.0% by volume or less, more preferably 9.0% by volume or more, further preferably 8.0% by volume or less, from the viewpoint of obtaining more excellent combustibility. The lower limit is not particularly limited and is usually 1.5% by volume or more.
In the present specification, the aromatic component having 9 carbon atoms, the aromatic component having 10 carbon atoms and the aromatic component having 11 or more carbon atoms are referred to as JIS K 2536-2 "Petroleum products-Testing method for components-Part 2: It is a value measured by "determination of all components by gas chromatography".

The aromatic hydrocarbon oil used in the present embodiment is, for example, one-ring aromatics (monocyclic aromatics) such as light benzene, toluene, xylene, etc. among aromatics produced from a naphtha catalytic reformer. It is obtained by fractionally distilling (extracting) a component and a part of an aromatic component having 9 carbon atoms into a gasoline base material and a petrochemical base material, and then fractionally distilling. Therefore, aromatic hydrocarbon oils include monocyclic aromatics having 9 carbon atoms, bicyclic aromatics such as naphthalene, and polycyclic aromatics such as tricyclic aromatics such as phenanthrene.

(Content of aromatic hydrocarbon oil)
The content of the aromatic hydrocarbon oil based on the total amount of the composition is 3.0% by volume or more and 23.0% by volume or less. Improve low temperature fluidity and combustibility, make it more suitable as a fuel oil composition for an external combustion machine equipped with a hydraulic atomization burner with a low rated combustion amount and low atomization hydraulic pressure, and more stable due to high yield. The content of the aromatic hydrocarbon oil based on the total amount of the composition is preferably 5.0 vol% or more, It is preferably 7.5% by volume or more, and the upper limit is preferably 20.0% by volume or less, more preferably 17.5% by volume or less.

(Antioxidant)
The fuel oil composition for an external combustion machine of the present embodiment contains an antioxidant in an amount of 20 mass ppm or more and 100 mass ppm or less in terms of the total amount of the composition. If the above-mentioned antioxidant is not contained in the above-mentioned content, storage stability may be deteriorated and combustibility may be deteriorated.
The content of the antioxidant based on the total amount of the composition is preferably 25 mass ppm or more, more preferably 30 mass ppm or more, from the viewpoint of improving storage stability and improving combustibility, and the upper limit. Is preferably 80 mass ppm or less, more preferably 60 mass ppm or less.

The antioxidant used in the present embodiment can be used without particular limitation as long as it is one commonly used in fuel oil compositions, and examples thereof include phenol-based antioxidants, amine-based antioxidants, and other antioxidants. Are preferred. Moreover, in this embodiment, antioxidant can be used individually by 1 type or in combination of 2 or more types.

Examples of the phenolic antioxidant include 2,6-di-tert-butyl-4-methylphenol, 2,4-dimethyl-6-tert-butylphenol, 2,6-di-tert-butylphenol, 2,4,6. -Monocyclic tert-alkylphenol antioxidants such as tri-tert-butylphenol and 2,6-di-tert-butyl-4-(N,N-dimethylaminomethyl)phenol; 4,4'-methylenebis(2 , 6-di-tert-butylphenol), 4,4'-isopropylidenebis(2,6-di-tert-butylphenol), 2,2'-methylenebis(4-methyl-6-tert-butylphenol), 4, 4'-bis(2,6-di-tert-butylphenol), 4,4'-bis(2-methyl-6-tert-butylphenol), 2,2'-methylenebis(4-ethyl-6-tert-butylphenol) ), 4,4′-butylidene bis(3-methyl-6-tert-butylphenol) and other polycyclic tert-alkylphenol antioxidants; and the like.

Examples of the amine-based antioxidant include monoalkyldiphenylamine-based antioxidants such as monooctyldiphenylamine and monononyldiphenylamine; 4,4′-dibutyldiphenylamine, 4,4′-dipentyldiphenylamine, 4,4′-dihexyldiphenylamine, 4 , 4'-diheptyldiphenylamine, 4,4'-dioctyldiphenylamine, 4,4'-dinonyldiphenylamine and other dialkyldiphenylamine antioxidants; tetrabutyldiphenylamine, tetrahexyldiphenylamine, tetraoctyldiphenylamine, tetranonyldiphenylamine and the like Examples thereof include polyalkyldiphenylamine-based antioxidants; naphthylamine-based antioxidants such as α-naphthylamine, phenyl-α-naphthylamine, and butylphenyl-α-naphthylamine.

In the present embodiment, a phenolic antioxidant having a tert-alkyl group is preferable, a monocyclic phenolic antioxidant having a tert-alkyl group is more preferable, and among them, 2,6-di-tert-butylphenol, 2,4-Dimethyl-6-tert-butylphenol and 2,6-di-tert-butyl-4-methylphenol are preferred.

(Other additives)
In the fuel oil composition for an external combustion machine of the present embodiment, a low temperature fluidity improver, a lubricant, as an additive other than the above antioxidant, if necessary, in a range capable of maintaining the above various properties. Various additives such as a property improver, a cetane number improver, a combustion accelerator, a detergent, a sludge dispersant, and a fungicide can be appropriately selected and blended. Also, coumarin may be blended from the viewpoint of light oil delivery tax.

(Use)
The fuel oil composition for an external combustion machine according to the present embodiment exhibits excellent low-temperature fluidity even in a cold region in the severe cold season, and an external combustion machine equipped with a hydraulic spray burner with a small rated combustion amount and a low spray hydraulic pressure. In addition, the steam boiler has excellent combustibility, can supply more stably with a high yield, and has a higher calorific value, which can contribute to improvement of fuel efficiency. It is preferably used for an external combustion machine such as a hot water boiler, a hot air heater, an absorption type cold/hot water machine, and a hot water generator.
Further, the fuel oil composition for an external combustion machine of the present embodiment has a rated combustion amount of 10.0 L/hour or less and a spray hydraulic pressure of 0.90 MPa or less, preferably a rated combustion amount of 7 among the above external combustion machines. When used in an external combustion machine equipped with a hydraulic spray burner having a combustion pressure of not more than 0.0 L/hour and a spray oil pressure of 0.80 MPa or less, and more preferably a rated combustion amount of 5.0 L/hour or less and a spray oil pressure of 0.70 MPa or less. The above characteristics are particularly exerted.

[Method for producing fuel oil composition for external combustion machine]
The method for producing a fuel oil composition for an external combustion machine according to the present embodiment contains 90.0% by volume or more of a fraction obtained by hydrodesulfurizing a straight distillation fraction obtained by atmospheric distillation of crude oil, the above (a ₁ ). A heavy kerosene fraction satisfying all of (e ₁ ) to an aromatic hydrocarbon oil satisfying all of the above (a ₂ ) to (f ₂ ) and an antioxidant. Formulated such that the content of the hydrocarbon oil in terms of the total amount of the composition is 3.0% by volume or more and 23.0% by volume or less, and the content of the antioxidant in the amount of the entire composition is 20% by mass or more and 100% by mass or less. However, the fuel oil composition for an external combustion machine satisfying all of the above (1) to (6) is manufactured. The fuel oil composition for an external combustion machine of this embodiment can be easily manufactured by the manufacturing method of this embodiment.

In the method for producing a fuel oil composition for an external combustion machine according to the present embodiment, properties and composition of the obtained fuel oil composition for an external combustion machine, a heavy kerosene fraction, an aromatic hydrocarbon oil, an antioxidant, etc. The aspect is the same as the aspect of the fuel oil composition for external combustion machines described above.
There is no particular limitation on the order of blending the heavy kerosene fraction, the aromatic hydrocarbon oil, the antioxidant, and various additives used as necessary. For example, the heavy kerosene fraction may be mixed with the aromatic hydrocarbon. The oil, antioxidant, and various additives may be sequentially added and mixed, or the antioxidant and various additives may be mixed in advance, and then the mixture, the heavy kerosene fraction, and the aromatic carbonization. You may mix with hydrogen oil.

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. The properties of each base material were determined according to the following methods as described above.

[Measurement of properties and composition]
Various properties and compositions of heavy kerosene fraction, aromatic hydrocarbon oil, and fuel oil composition were measured by the following methods.
-Distillation properties (initial boiling point, end point and 95% by volume distillation temperature): Measured according to JIS K2254: 1998 (petroleum products-distillation test method-).
Flash point: Measured according to JIS K 2265-1:2007 (Crude oil and petroleum products-Flash point test method-Part 3: Tag sealing method).
-Sulfur content: Measured according to JIS K2541-7:2003 (Crude oil and petroleum products-Sulfur content test method-Part 7: Wavelength dispersive fluorescent X-ray method).
Cloud point: Measured according to JIS K2269:1987 (testing method for pour point and cloud point of crude oil and petroleum products).
-Total calorific value: Measured and estimated according to JIS K2279:2003 (crude oil and petroleum products-calorific value test method and estimation method by calculation-) ("6. total calorific value estimation method, 6.3 e) 1") Estimated by the calculation formula for crude oil, kerosene, light oil, heavy oil A and heavy oil B).
-Reaction test: Measured by a petroleum product-reaction test according to JIS K 2252:1998.
Moisture content: Measured according to JIS K 2275-3:2015 (Crude oil and petroleum products-Determination of water content-Part 3: Karl Fischer coulometric titration method).
-Ash content: Measured according to JIS K 2272:1998 (Crude oil and petroleum products-Test method for ash content and sulfated ash content-).
Kinematic viscosity at 30° C.: Measured according to JIS K 2283:2000 (Kinematic viscosity test method for crude oil and petroleum products).
-Density at 15°C: Measured according to JIS K 2249-1:2011 (Crude oil and petroleum products-Determination of density-Part 1: Vibration method).
-Composition: Saturated content, olefin content, 1-ring aromatic content, 2-ring aromatic content and 3-ring aromatic content are specified in JPI-5S-49-2007, Petroleum products-Hydrocarbon type test method-High speed It was measured by a liquid chromatography method (High Performance Liquid Chromatography method).
-Aromatic content according to carbon number: The content of the aromatic content having 9 carbon atoms, the aromatic content having 10 carbon atoms, and the aromatic content having 11 or more carbon atoms is determined according to JIS K 2536-2 "Petroleum product-component test method". -Part 2: Determination of all components by gas chromatography".

[Performance evaluation criteria]
The following performances 1 to 4 were evaluated, and the worst evaluation was evaluated as a comprehensive evaluation. If it is E evaluation, it is unacceptable.
1. Combustibility (1) Evaluation model, conditions/evaluation model; Warm air warmer (“House Kaonki HK-1527”, manufactured by Nepon Co., rated combustion amount 4.9 L/hour, on/off control)
・Fuel spray pressure: 0.69 MPa (hydraulic spray burner)
・Band shutter opening; Adjust exhaust gas oxygen concentration to be 3.0±0.2% ・Heater before burner for fuel heating; Off (2) Evaluation item Repeat 1 hour continuous combustion, 15 minutes extinguishing as 1 cycle After burning for 500 hours, the following items were evaluated.
・Ignition property: No visual ignition delay ・Flammability: Baccarat smoke tester measures soot concentration in exhaust gas (Baccaraca smoke number; SN) (3) Evaluation criterion A: No ignition delay, soot concentration ( SN) is 0.5 or less B: No ignition delay, soot concentration (SN) is more than 0.5 and 1.0 or less C: No ignition delay, soot concentration (SN) is more than 1.0 and 1.5 or less E :Other than those above

2. Storage stability (1) Evaluation item According to ASTM D4625, after storage in the dark at 43°C for 6 weeks (equivalent to about 6 months storage at room temperature), the amount of dry sludge was adjusted to the fuel oil standard Z for all fishing vessels. ． G. It was measured based on the All Fisheries Ream A heavy oil dry sludge measurement method specified in ST-1010.
(2) Evaluation criteria A: Dry sludge is 1 mg/100 mL or less E: Other than the above

3. Low temperature fluidity (1) Evaluation item The oil passage limit temperature was measured according to the low temperature fluidity test method standard (actual machine simulation method) of A heavy oil of JPI-5S-47-96. The oil passage limit temperature is the minimum oil temperature at which the filter is not clogged due to the wax deposited at a low temperature. If the oil temperature is lowered below the oil passage limit temperature, the possibility that the filter will be clogged with wax becomes very high.
(2) Evaluation criteria A: Oil passage limit temperature ≤-20.0°C
E: Other than the above

4. Fuel economy performance Based on the total calorific value, the following criteria were used for evaluation.
A: Total calorific value of 37,400 kJ/L or more B: Total calorific value of 37,200 kJ/L or more C: Total calorific value of 37,100 kJ/L or more D: Total calorific value of 37,000 kJ/L or more E: Total calorific value less than 37,000 kJ/L

[Method of producing heavy kerosene fraction]
The straight-run kerosene fraction obtained by atmospheric distillation of crude oil was hydrodesulfurized at a reaction temperature (about 340° C.) at which the sulfur content became 5 mass ppm to obtain a heavy kerosene fraction.
The properties and composition of the obtained heavy kerosene fraction were determined in the same manner as in the evaluation of the above base material. The results are shown in Table 1.

[Examples 1 to 4, Comparative Examples 1 and 2]
A heavy kerosene fraction obtained by the method for producing a heavy kerosene fraction having the properties and composition shown in Table 1 and an aromatic hydrocarbon oil having the properties and composition shown in Table 1 are prepared. did. A heavy kerosene fraction, an aromatic hydrocarbon oil, and an antioxidant (2,6-di-tert-butyl-4-methylphenol) are mixed in a ratio shown in Table 2 to prepare a fuel oil composition. did.
Each of the obtained fuel oil compositions was evaluated for flammability, storage stability, low temperature fluidity, and fuel efficiency according to the following criteria. The results are shown in Table 2.

[Performance evaluation results]
As shown in Table 2, the fuel oil composition for an external combustion machine of the present embodiment has good combustibility, storage stability, low temperature fluidity, and fuel efficiency, and even in cold regions during the severe cold season. Shows excellent low-temperature fluidity, shows excellent combustibility even in an external combustion machine equipped with a hydraulic spray burner with a low rated combustion amount and low spray hydraulic pressure, and enables stable supply with a high yield. It was also confirmed that having a higher calorific value can contribute to improving fuel efficiency.
On the other hand, the fuel oil composition of Comparative Example 1 containing no aromatic hydrocarbon oil has poor fuel efficiency due to the low total calorific value, and the fuel oil of Comparative Example 2 containing a large amount of aromatic hydrocarbon oil. The composition was poor in flammability, and could not exhibit excellent flammability in an external combustion machine equipped with a hydraulic spray burner having a low rated combustion amount and a low spray hydraulic pressure in a cold region in the severe cold season.

The fuel oil composition for an external combustion machine according to the present embodiment exhibits excellent low-temperature fluidity even in a cold region in the severe cold season, and an external combustion machine equipped with a hydraulic spray burner with a small rated combustion amount and a low spray hydraulic pressure. Also shows excellent flammability, more stable supply with a high yield, and higher calorific value can contribute to improved fuel economy, and winter demand in cold regions It is possible to solve the supply shortage of kerosene and kerosene fraction which are very large.
The fuel oil composition for an external combustion machine of the present embodiment is preferably used for an external combustion machine such as a steam boiler, a hot water boiler, a hot air heater, an absorption chiller-heater, and a hot water generator, and particularly, a rated combustion When used in a steam external combustion machine equipped with a hydraulic atomizing burner having an amount of 10.0 L/hour or less and an atomizing oil pressure of 0.90 MPa or less, the above characteristics are exhibited, and thus it is particularly preferably used.

Claims (4)

Containing fraction was hydrogenated desulfurized straight run fractions obtained by atmospheric distillation of crude oil 90.0% by volume or more, and the following (a _{1) ~} heavy kerosene fraction that satisfies both the (e _1), following _{(a 2) ~ (f 2} ) and an aromatic hydrocarbon oil that satisfies all the, contains, and antioxidant, the content of the total amount of the composition of the aromatic hydrocarbon oil is 3. It is 0% by volume or more and 23.0% by volume or less, and the content of the antioxidant based on the total amount of the composition is 20 mass ppm or more and 100 mass ppm or less, and all of the following (1) to (6) are satisfied. Fuel oil composition for external combustion machines.
(A ₁ ) 95% by volume distillation temperature is 271.0°C or higher and 300.0°C or lower (b ₁ ) Initial boiling point is 140.0°C or higher (c ₁ ) Flash point is 40.0°C or higher (d ₁ ) Sulfur content is 3 mass ppm or more and 10 mass ppm or less (e ₁ ) Cloud point is −20.0° C. or less (a ₂ ) Aromatic content is 99.0 vol% or more (b ₂ ) Sulfur content Is 0.01 mass% or less (c ₂ ) Cloud point is −50.0° C. or less (d ₂ ) Kinematic viscosity at 30° C. is 1.600 mm ² /s or less (e ₂ ) Density at 15° C. is 0.9000 g/ cm ³ or higher (f ₂ ) flash point is 50.0° C. or higher (1) 95% by volume distillation temperature is 271.0° C. or higher and 300.0° C. or lower (2) initial boiling point is 140.0° C. or higher (3) Flash point is 40.0°C or more (4) Sulfur content is 3 mass ppm or more and 10 mass ppm or less (5) Cloud point is -20.0°C or less (6) Total calorific value is 37,000 (kJ/L) )that's all Furthermore, the fuel oil composition for external combustion machines according to claim 1, which satisfies at least one selected from the following (7) to (12).
(7) The result of the petroleum product reaction test is neutral (8) Water content is 0.01% by volume or less (9) Ash content is 0.001% by mass or less (10) Kinematic viscosity at 30° C. is 1.300 mm ² /S or more and 1.700 mm ² /s or less (11) Density at 15°C is 0.8000 g/cm ³ or more (12) Saturation content based on the total amount of the composition is 60.0% by volume or more, and olefin content is 0.3 volume % Or less, 1-ring aromatic content is 35.0% by volume or less, 2-ring aromatic content is 5.0% by volume or less, and 3-ring aromatic content is 1.5% by volume or less. The fuel oil composition for an external combustion machine according to claim 1 or 2, which is used in an external combustion machine equipped with a hydraulic spraying burner having a rated combustion amount of 10.0 L/hour or less and a spraying hydraulic pressure of 0.9 MPa or less. Containing fraction was hydrogenated desulfurized straight run fractions obtained by atmospheric distillation of crude oil 90.0% by volume or more, and the following (a _{1) ~} heavy kerosene fraction that satisfies both the (e _1), The content of aromatic hydrocarbon oil satisfying any of the following (a ₂ ) to (f ₂ ) and the antioxidant is 3.0% by volume based on the total amount of the composition of the aromatic hydrocarbon oil. External combustion satisfying any of the following (1) to (6), which is blended so that the content of the antioxidant is 23.0% by volume or less and the content of the antioxidant based on the total amount of the composition is 20 mass ppm or more and 100 mass ppm or less. A method for producing an engine fuel oil composition.
(A ₁ ) 95% by volume distillation temperature is 271.0°C or higher and 300.0°C or lower (b ₁ ) Initial boiling point is 140.0°C or higher (c ₁ ) Flash point is 40.0°C or higher (d ₁ ) Sulfur content is 3 mass ppm or more and 10 mass ppm or less (e ₁ ) Cloud point is −20.0° C. or less (a ₂ ) Aromatic content is 99.0 vol% or more (b ₂ ) Sulfur content Is 0.01 mass% or less (c ₂ ) Cloud point is −50.0° C. or less (d ₂ ) Kinematic viscosity at 30° C. is 1.600 mm ² /s or less (e ₂ ) Density at 15° C. is 0.9000 g/ cm ³ or higher (f ₂ ) flash point is 50.0° C. or higher (1) 95% by volume distillation temperature is 271.0° C. or higher and 300.0° C. or lower (2) initial boiling point is 140.0° C. or higher (3) Flash point is 40.0°C or more (4) Sulfur content is 3 mass ppm or more and 10 mass ppm or less (5) Cloud point is -20.0°C or less (6) Total calorific value is 37,000 (kJ/L) )that's all