CA1050271A - Process for the production of hydrogen and carbon monoxide-containing gas - Google Patents
Process for the production of hydrogen and carbon monoxide-containing gasInfo
- Publication number
- CA1050271A CA1050271A CA217,858A CA217858A CA1050271A CA 1050271 A CA1050271 A CA 1050271A CA 217858 A CA217858 A CA 217858A CA 1050271 A CA1050271 A CA 1050271A
- Authority
- CA
- Canada
- Prior art keywords
- reaction zone
- fuel
- range
- residence time
- seconds
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000007789 gas Substances 0.000 title claims abstract description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 229910002091 carbon monoxide Inorganic materials 0.000 title claims abstract description 8
- 239000001257 hydrogen Substances 0.000 title claims abstract description 8
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 62
- 239000000446 fuel Substances 0.000 claims abstract description 46
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000003085 diluting agent Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 description 10
- 239000007800 oxidant agent Substances 0.000 description 9
- 239000003245 coal Substances 0.000 description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 description 6
- 239000007795 chemical reaction product Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000003575 carbonaceous material Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000036647 reaction Effects 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000011275 tar sand Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
- C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
- C01B3/36—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using oxygen or mixtures containing oxygen as gasifying agents
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/466—Entrained flow processes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/485—Entrained flow gasifiers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/74—Construction of shells or jackets
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0903—Feed preparation
- C10J2300/0909—Drying
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0943—Coke
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0946—Waste, e.g. MSW, tires, glass, tar sand, peat, paper, lignite, oil shale
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0956—Air or oxygen enriched air
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0959—Oxygen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0969—Carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0973—Water
- C10J2300/0976—Water as steam
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/12—Heating the gasifier
- C10J2300/1253—Heating the gasifier by injecting hot gas
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
- C10J2300/1846—Partial oxidation, i.e. injection of air or oxygen only
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Inorganic Chemistry (AREA)
- Hydrogen, Water And Hydrids (AREA)
Abstract
A B S T R A C T
A process for the production of a hydrogen and carbon monoxide-containing gas from a carbonaceous fuel which comprises reacting diluted oxygen with the carbon-aceous fuel in a first reaction zone which is kept at a relatively high average temperature and introducing the effluent of the first reaction zone into a second re-action zone, the average temperature of which is sub-stantially lower than that of the first reaction zone.
A process for the production of a hydrogen and carbon monoxide-containing gas from a carbonaceous fuel which comprises reacting diluted oxygen with the carbon-aceous fuel in a first reaction zone which is kept at a relatively high average temperature and introducing the effluent of the first reaction zone into a second re-action zone, the average temperature of which is sub-stantially lower than that of the first reaction zone.
Description
The invention relates to the production of hydrogen and carbon monoxide-containing gas from carbonaceous fuels.
It has been proposed to produce hydrogen and carbon monoxide-containing gas by causing a finely dispersed carbonaceous fuel to react with oxygen diluted with nitrogen and/or steam in a single stage. The high tem-peratures required for such a process result in a high oxygen consumption which leads to a relatively low yield of C0 and H2.
It has now been found that the yield of C0 and H2 can be in-creased by carrying out the process in two stages.
The invention therefore relates to a process for the production of a hydrogen and carbon monoxide-containing gas from a carbonaceous fuel which comprises reacting diluted oxygen with the carbonaceous fuel in a first -reaction zone which is kept at an average temperature in the range of from 1200 to 1700C and introducing the effluent of the first reaction zone into -a second reaction zone, the average temperature of which is at least 100C
lower than that of the first reaction zone.
As a feedstock for the present process any carbonaceous fuel can be used. In this specification by a carbonaceous fuel is meant any combustible material consisting of a substantial part of carbon. The fuel may contain oxygen, sulphur and/or nitrogen. Such a feedstock includes, e.g., lignite, anthracite, bituminous coal, coke, shale oil,mineral oils or oil fractions, tar sand oil or natural gas. The feedstock, if solid, should be in a powdered form so that it can readily react with oxygen in the first : :~
:
.
.
'
It has been proposed to produce hydrogen and carbon monoxide-containing gas by causing a finely dispersed carbonaceous fuel to react with oxygen diluted with nitrogen and/or steam in a single stage. The high tem-peratures required for such a process result in a high oxygen consumption which leads to a relatively low yield of C0 and H2.
It has now been found that the yield of C0 and H2 can be in-creased by carrying out the process in two stages.
The invention therefore relates to a process for the production of a hydrogen and carbon monoxide-containing gas from a carbonaceous fuel which comprises reacting diluted oxygen with the carbonaceous fuel in a first -reaction zone which is kept at an average temperature in the range of from 1200 to 1700C and introducing the effluent of the first reaction zone into -a second reaction zone, the average temperature of which is at least 100C
lower than that of the first reaction zone.
As a feedstock for the present process any carbonaceous fuel can be used. In this specification by a carbonaceous fuel is meant any combustible material consisting of a substantial part of carbon. The fuel may contain oxygen, sulphur and/or nitrogen. Such a feedstock includes, e.g., lignite, anthracite, bituminous coal, coke, shale oil,mineral oils or oil fractions, tar sand oil or natural gas. The feedstock, if solid, should be in a powdered form so that it can readily react with oxygen in the first : :~
:
.
.
'
- 2 -..A.., ~ . . .
lOS0271 reaction zone. Preferably, the size of solid carbonaceous fuel has been reduced such that 70% of the fuel has a particle size smaller than 200 mesh.
The oxidant includes air and oxygen diluted with steam, carbon dioxide, nitrogen and/or argon. Advantageously, the oxidant is preheated before it is reacted with the carbonaceous fuel. The preheating of the oxidant is ~uitably carried out indirectly by heat exchange with any heat source, e.g., the hot product gas obtained in the present process. The oxidant is preferably preheated to ~`
a temperature in the range of from 200 to 1300C, depending on the type oxidant. After the preheating the hot oxidant is advantageously mixed with carbonaceous fuel and the oxidant/fuel mixture is introduced, preferably as a jet, into the fir~t reaction zone. In one embodiment of the ~l~ present process the amount of fuel to be introduced in the first reaction stage is preferably 50 to 95% of the . , j.
total amountjof fuel to be gasified and the remainder of ~3~ the fuel is introduced either in the first stage effluent or directly into the second reaction zone.
In another embodiment the total amount of fuel is introduced into the first reaction zone and the residence ; t1me is chosen such that the fuel is only partly converted to the desired product, the conversion to the desired ~25 `product being substantially completed in the second reaction zone.
. ,, . ~
lOS0271 reaction zone. Preferably, the size of solid carbonaceous fuel has been reduced such that 70% of the fuel has a particle size smaller than 200 mesh.
The oxidant includes air and oxygen diluted with steam, carbon dioxide, nitrogen and/or argon. Advantageously, the oxidant is preheated before it is reacted with the carbonaceous fuel. The preheating of the oxidant is ~uitably carried out indirectly by heat exchange with any heat source, e.g., the hot product gas obtained in the present process. The oxidant is preferably preheated to ~`
a temperature in the range of from 200 to 1300C, depending on the type oxidant. After the preheating the hot oxidant is advantageously mixed with carbonaceous fuel and the oxidant/fuel mixture is introduced, preferably as a jet, into the fir~t reaction zone. In one embodiment of the ~l~ present process the amount of fuel to be introduced in the first reaction stage is preferably 50 to 95% of the . , j.
total amountjof fuel to be gasified and the remainder of ~3~ the fuel is introduced either in the first stage effluent or directly into the second reaction zone.
In another embodiment the total amount of fuel is introduced into the first reaction zone and the residence ; t1me is chosen such that the fuel is only partly converted to the desired product, the conversion to the desired ~25 `product being substantially completed in the second reaction zone.
. ,, . ~
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The first reaction zone preferably consists of a void steel vessel, the inside of which has been lined with refractory material.
The partial combustion in the first reaction zone is carried out at a temperature in the range of from 1200 to 1700C, which temperature ~ -results from the reaction of the carbonaceous fuel with the oxidant.
The pressure maintained in the first reaction zone may vary within wide limits and is advantageously kept in the range of from 1 to 200 kg/cm2 absolute. -In a preferred embodiment the mixture of oxidant and carbo- ~
naceous fuel is introduced into the first reaction zone at a high velocity, ;-~ -- A suitable linear introduction velocity is in the range of from 10 to 200 m/
sec.
In order to convert all the carbonaceous fuel which is intro- f duced int~ the first reaction zone into a product gas the solid particles should remain during a certain residence time therein. It has been found , that the residence time of the reactants is advantageously chosen in the -~ range of from 0.02 to 20 seconds. The residence time is relatively short ~ll (preferably 0.02 - 3 seconds) in case the total fuel to be gasified is in- -troduced into the first reaction zone. The residence time is relatively long (preferably 0.5 - 20 seconds) if only part of the fuel to be gasified is introduced into the first reaction zone.
,~: - ~ .
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... .... . .. .. .... .... . . .. . . ...... . .. . .
~. ... . .... .. . .. . . ~ .. .
105027~
After at least a substantial part of the carbonaceous material has been converted to gas, the reaction product, mainly consisting of H2, C0, N2, C02 and H20 is withdrawn from the first reaction zone and introduced into the second reaction zone. In case only part of the carbonaceous `
material to be gasified is introduced into the first reaction zone, the remaining part of the carbonaceous material is introduced, preferably to-gether with steam, nitrogen and/or C02, into the effluent of the first reac-tion zone and/or the second reaction zone. The amount of fuel to be intro-tuced into the ~i~st seaction zone effluent is prefe~a~ly S to ~0% of the total amount of fuel to be gasified to hydrogen and carbon monoxide. The amount of steam, nitrogen and/or C02 which is introduced together with the remaining part of the fuel into the first reaction zone effluent is prefer- -ably in the range of from 1/10 to 2 Nm3 per kg fuel. This diluent gas ad-vantageously has a pressure in the range of from 2 to 210 kg/cm absolute and a temperature in the range of from 100 to 700C. The mixture of first reac-tion zone effluent and optionally of the remaining part of the fuel, together ' with steam, C02 and/or N2, is then passed to a second reaction zone where , carbonaceous material is substantially completely converted with the C02 ,l and/or the steam into carbon monoxide and hydrogen. This conversion is car-ried out at-a temperature which is at least 100C lower than that of the f:
first stage and is in the range of from 600 to 1400C. The pressure may be ~ atmospheric f~
f`~
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f~`:
_ 5 _ ~T
:
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~050271 ` ~ :
or superatmospheric, pressures up to 200 kg/cm2 absolute being suitable.
This second reaction zone preferably consists of a void steel vessel, the inner walls of which are lined with refractory material. The capacity of the second re-action zone should be great enough to provide a residence time for the reactants which is sufficiently long to convert the remaining part of the fuel substantially completely into gaseous components. This residence time is preferably ~;
in the range of from 0.5 to 40 seconds.
After the conversion has been terminated, the ultimate gaseous reaction product is withdrawn from the second re- --action zone. This reaction product has a temperature in the range of from 600 to 1400C. The dry gaseous reaction ~:
product has the following composition:
' . ' % vol.
, C2 0.01 - 20 CH4 0.01 - 20 ~, f N2 A 0.1 - 75 i~ H2S 0 - 4 ~.
The invention will now be further illustrated by means of the following Example to which it is by no means restricted.
;~ ~
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.),~
~, ;
lOS~Z71 EXAMPLE
As a feedstock coal was used having the following composition:
%wt C 73.7 H 5.1 8.8 S o.9 N 1.6 ~ -~
ash 9.
This coal contained 33.8%wt volatile components and 2.6~wt water; It was ground to a powder, 70% of which could pass a sieve of 200 mesh.
1028 kg of the coal were mixed with 858 kg of an oxidizing gas containing 98.9%wt 2 and 91 kg steam having a te~perature of 300C.
The coal/gas suspension was introduced at a linear velocity of 65 m/sec. in a first reaction zone.
; The reaction temperature in the first reaction zone was 1500C and the pressure was 40 kg/cm2 absolute.
The residence time of the reactants in the first reaction zone was 4 seconds.
.~ .
- After the coal had been converted, the reaction product was withdrawn from the first reaction zone and introduced into a second reaction zone together with 116 kg of the above-mentioned coal and 135 kg steam having a pressure of 50 kg/cm2 absolute and a temperature of 300C.
' .
.... . . ... .
~OSQ271 ~
In the second reaction zone the reaction product of the first reaction zone reacted with the coal and the steam. ;
The reaction conditions were: ;
tcmperaturc 1100C
pressure 39 kg/cm2 residence time 6 seconds After drying the ultimate product gas mixture had the following composition: .
%vol.
C0 62.5 :~
H2 33.8 -.
C2 1.2 N2 + A 0.9 H2S 0.3 .
I
', .
.
; ~
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;
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The first reaction zone preferably consists of a void steel vessel, the inside of which has been lined with refractory material.
The partial combustion in the first reaction zone is carried out at a temperature in the range of from 1200 to 1700C, which temperature ~ -results from the reaction of the carbonaceous fuel with the oxidant.
The pressure maintained in the first reaction zone may vary within wide limits and is advantageously kept in the range of from 1 to 200 kg/cm2 absolute. -In a preferred embodiment the mixture of oxidant and carbo- ~
naceous fuel is introduced into the first reaction zone at a high velocity, ;-~ -- A suitable linear introduction velocity is in the range of from 10 to 200 m/
sec.
In order to convert all the carbonaceous fuel which is intro- f duced int~ the first reaction zone into a product gas the solid particles should remain during a certain residence time therein. It has been found , that the residence time of the reactants is advantageously chosen in the -~ range of from 0.02 to 20 seconds. The residence time is relatively short ~ll (preferably 0.02 - 3 seconds) in case the total fuel to be gasified is in- -troduced into the first reaction zone. The residence time is relatively long (preferably 0.5 - 20 seconds) if only part of the fuel to be gasified is introduced into the first reaction zone.
,~: - ~ .
' 1 :
. , ~ 4 -A''' ... . ~ . . .. ~ ..... ~ ` . ` . . ....... .i . ... . . .
... .... . .. .. .... .... . . .. . . ...... . .. . .
~. ... . .... .. . .. . . ~ .. .
105027~
After at least a substantial part of the carbonaceous material has been converted to gas, the reaction product, mainly consisting of H2, C0, N2, C02 and H20 is withdrawn from the first reaction zone and introduced into the second reaction zone. In case only part of the carbonaceous `
material to be gasified is introduced into the first reaction zone, the remaining part of the carbonaceous material is introduced, preferably to-gether with steam, nitrogen and/or C02, into the effluent of the first reac-tion zone and/or the second reaction zone. The amount of fuel to be intro-tuced into the ~i~st seaction zone effluent is prefe~a~ly S to ~0% of the total amount of fuel to be gasified to hydrogen and carbon monoxide. The amount of steam, nitrogen and/or C02 which is introduced together with the remaining part of the fuel into the first reaction zone effluent is prefer- -ably in the range of from 1/10 to 2 Nm3 per kg fuel. This diluent gas ad-vantageously has a pressure in the range of from 2 to 210 kg/cm absolute and a temperature in the range of from 100 to 700C. The mixture of first reac-tion zone effluent and optionally of the remaining part of the fuel, together ' with steam, C02 and/or N2, is then passed to a second reaction zone where , carbonaceous material is substantially completely converted with the C02 ,l and/or the steam into carbon monoxide and hydrogen. This conversion is car-ried out at-a temperature which is at least 100C lower than that of the f:
first stage and is in the range of from 600 to 1400C. The pressure may be ~ atmospheric f~
f`~
'': ~
f~`:
_ 5 _ ~T
:
, .. ~ .. . . . . . . .
.., . .. . . . . . .
~050271 ` ~ :
or superatmospheric, pressures up to 200 kg/cm2 absolute being suitable.
This second reaction zone preferably consists of a void steel vessel, the inner walls of which are lined with refractory material. The capacity of the second re-action zone should be great enough to provide a residence time for the reactants which is sufficiently long to convert the remaining part of the fuel substantially completely into gaseous components. This residence time is preferably ~;
in the range of from 0.5 to 40 seconds.
After the conversion has been terminated, the ultimate gaseous reaction product is withdrawn from the second re- --action zone. This reaction product has a temperature in the range of from 600 to 1400C. The dry gaseous reaction ~:
product has the following composition:
' . ' % vol.
, C2 0.01 - 20 CH4 0.01 - 20 ~, f N2 A 0.1 - 75 i~ H2S 0 - 4 ~.
The invention will now be further illustrated by means of the following Example to which it is by no means restricted.
;~ ~
~ -6-1 .
.),~
~, ;
lOS~Z71 EXAMPLE
As a feedstock coal was used having the following composition:
%wt C 73.7 H 5.1 8.8 S o.9 N 1.6 ~ -~
ash 9.
This coal contained 33.8%wt volatile components and 2.6~wt water; It was ground to a powder, 70% of which could pass a sieve of 200 mesh.
1028 kg of the coal were mixed with 858 kg of an oxidizing gas containing 98.9%wt 2 and 91 kg steam having a te~perature of 300C.
The coal/gas suspension was introduced at a linear velocity of 65 m/sec. in a first reaction zone.
; The reaction temperature in the first reaction zone was 1500C and the pressure was 40 kg/cm2 absolute.
The residence time of the reactants in the first reaction zone was 4 seconds.
.~ .
- After the coal had been converted, the reaction product was withdrawn from the first reaction zone and introduced into a second reaction zone together with 116 kg of the above-mentioned coal and 135 kg steam having a pressure of 50 kg/cm2 absolute and a temperature of 300C.
' .
.... . . ... .
~OSQ271 ~
In the second reaction zone the reaction product of the first reaction zone reacted with the coal and the steam. ;
The reaction conditions were: ;
tcmperaturc 1100C
pressure 39 kg/cm2 residence time 6 seconds After drying the ultimate product gas mixture had the following composition: .
%vol.
C0 62.5 :~
H2 33.8 -.
C2 1.2 N2 + A 0.9 H2S 0.3 .
I
', .
.
Claims (13)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A process for the production of a hydrogen and carbon monoxide-containing gas from a carbonaceous fuel which comprises reacting diluted oxygen with the carbonaceous fuel in a first reaction zone which is kept at an average temperature in the range of from 1200 to 1700°C and introducing the effluent of the first reaction zone into a second reaction zone, the average temperature of which is at least 100°C lower than that of the first reaction zone.
2. A process as claimed in claim 1, in which the carbonaceous fuel is a powdered solid, 70% of which has a particle size smaller than 200 mesh.
3. A process as claimed in claim 1, in which the diluted oxygen is preheated to a temperature in the range of from 200 to 1300°C.
4. A process as claimed in claim 1, 2 or 3, in which the fuel is mixed with the diluted oxygen and the diluted oxygen/fuel mixture is intro-duced as a jet in the first reaction zone at a linear velocity in the range of from 10 to 200 m/sec.
5. A process as claimed in claim 1, 2 or 3, in which 50 to 95% of the total amount of fuel is introduced into the first reaction zone and the remaining part of the fuel is introduced into the effluent of the first reaction zone and/or the second reaction zone.
6. A process as claimed in claim 1, 2 or 3, in which the reaction in the first reaction zone is carried out at a pressure in the range of from 1 to 200 kg/cm2 and a residence time in the range of from 0.02 to 20 seconds.
7. A process as claimed in any one or more of claims 1, 2 or 3, in which the total fuel is introduced into the first reaction zone and the residence time therein is in the range of from 0.02 to 3 seconds.
8. A process as claimed in claim 1, 2 or 3, in which part of the fuel is introduced into the first reaction zone and the residence time there-in is in the range of from 0.5 - 20 seconds.
9. A process as claimed in claim 1, 2 or 3, in which part of the fuel is introduced into the reaction zone together with 1/10 to 2 m3 (NTP) per kg fuel of a diluent consisting of steam, nitrogen and/or CO2.
10. A process according to claim 1, 2 or 3, in which part of the fuel is introduced into the first reaction zone and the residence time there-in is in the range of from 0.5 - 20 seconds and part of the fuel is intro-duced into the second reaction zone together with 1/10 to 2 m3 (NTP) per kg fuel of a diluent consisting of steam, nitrogen and/or CO2.
11. A process as claimed in claim 1, 2 or 3, in which part of the fuel is introduced into the second reaction zone together with 1/10 to 2 m3 (NTP) per kg fuel of a diluent consisting of steam, nitrogen and/or CO2, and the diluent has a pressure in the range of from 2 to 210 kg/cm2 and a tem-perature in the range of from 100 to 700°C.
12. A process as claimed in claim 1, 2 or 3, in which the tempera-ture in the second reaction zone is in the range of from 600 to 1400°C.
13. A process as claimed in claim 1, 2 or 3, in which the reaction in the second reaction zone is carried out at a temperature in the range of from 600 to 1400°C, a pressure in the range of from 1 to 200 kg/cm2 absolute and a residence time in the range of from 0.5 to 40 seconds.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7903/74A GB1491465A (en) | 1974-02-21 | 1974-02-21 | Process for the production of hydrogen and carbon monoxide-containing gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1050271A true CA1050271A (en) | 1979-03-13 |
Family
ID=9842016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA217,858A Expired CA1050271A (en) | 1974-02-21 | 1975-01-14 | Process for the production of hydrogen and carbon monoxide-containing gas |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5851036B2 (en) |
| CA (1) | CA1050271A (en) |
| DE (1) | DE2507124A1 (en) |
| FR (1) | FR2261974B1 (en) |
| GB (1) | GB1491465A (en) |
| NL (1) | NL7501943A (en) |
| ZA (1) | ZA751033B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2442216A1 (en) * | 1978-11-24 | 1980-06-20 | Texaco Development Corp | Prodn. of clean fuel gas and/or power from hydrocarbon fuels - by partial oxidation in free-flow, non-catalytic gas generator |
| US4278445A (en) * | 1979-05-31 | 1981-07-14 | Avco Everett Research Laboratory, Inc. | Subsonic-velocity entrained-bed gasification of coal |
| JPS57182394A (en) * | 1981-05-06 | 1982-11-10 | Hitachi Ltd | Jet bed gasification furnace |
| JPH0649874B2 (en) * | 1982-08-25 | 1994-06-29 | 株式会社日立製作所 | Coal spouted bed gasification method |
| JPS6026254U (en) * | 1983-07-28 | 1985-02-22 | 川崎重工業株式会社 | piston |
| DE4209549A1 (en) * | 1992-03-24 | 1993-09-30 | Vaw Ver Aluminium Werke Ag | Processes for the thermal treatment of residues, e.g. for the separation and recycling of metal compounds with organic components, using a combination of pyrolysis and gasification |
| US5431703A (en) * | 1993-05-13 | 1995-07-11 | Shell Oil Company | Method of quenching synthesis gas |
| DE19652770A1 (en) * | 1996-12-18 | 1998-06-25 | Metallgesellschaft Ag | Process for gasifying solid fuels in the circulating fluidized bed |
| RU2408528C2 (en) * | 2008-08-06 | 2011-01-10 | Институт химии нефти Сибирского отделения Российской академии наук | Method of producing hydrogen |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3746522A (en) * | 1971-09-22 | 1973-07-17 | Interior | Gasification of carbonaceous solids |
-
1974
- 1974-02-21 GB GB7903/74A patent/GB1491465A/en not_active Expired
-
1975
- 1975-01-14 CA CA217,858A patent/CA1050271A/en not_active Expired
- 1975-02-19 FR FR7505112A patent/FR2261974B1/fr not_active Expired
- 1975-02-19 JP JP50019967A patent/JPS5851036B2/en not_active Expired
- 1975-02-19 NL NL7501943A patent/NL7501943A/en unknown
- 1975-02-19 DE DE19752507124 patent/DE2507124A1/en not_active Ceased
- 1975-02-19 ZA ZA00751033A patent/ZA751033B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AU7833875A (en) | 1976-08-19 |
| GB1491465A (en) | 1977-11-09 |
| ZA751033B (en) | 1976-01-28 |
| JPS50119006A (en) | 1975-09-18 |
| FR2261974A1 (en) | 1975-09-19 |
| NL7501943A (en) | 1975-08-25 |
| JPS5851036B2 (en) | 1983-11-14 |
| DE2507124A1 (en) | 1975-08-28 |
| FR2261974B1 (en) | 1978-02-03 |
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