CN120102811A - A method and system for measuring absorbent loss rate during operation of a carbon capture device - Google Patents
A method and system for measuring absorbent loss rate during operation of a carbon capture device Download PDFInfo
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Abstract
本发明公开了一种碳捕集装置运行过程中吸收剂损耗率的测量方法和测量系统，属于碳捕集测试领域。本发明提供的测量方法包括：在吸收剂中引入标记物，进行碳捕集；在碳捕集装置运行过程中，获取不同时间下吸收剂中的活性组分浓度和标记物浓度；基于获取的不同时间下吸收剂中的活性组分浓度和标记物浓度，计算得到吸收剂在不同时间段内的活性组分损耗量。本发明在吸收剂中引入标记物，将其作为吸收剂中活性组分浓度变化的参照点，能够更准确地测量吸收剂中的活性组分在碳捕集装置运行过程中的损耗率，进而有利于准确评价吸收剂的抗降解性能和损耗成本，以及开发更稳定的吸收剂，本发明的测量方法和测量系统在碳捕集系统中具有良好的应用前景。The present invention discloses a method and system for measuring the loss rate of an absorbent during the operation of a carbon capture device, and belongs to the field of carbon capture testing. The measurement method provided by the present invention includes: introducing a marker into the absorbent to perform carbon capture; during the operation of the carbon capture device, obtaining the concentration of active components and the concentration of markers in the absorbent at different times; based on the obtained concentration of active components and the concentration of markers in the absorbent at different times, calculating the loss of active components in the absorbent in different time periods. The present invention introduces a marker into the absorbent and uses it as a reference point for the change in the concentration of active components in the absorbent, which can more accurately measure the loss rate of active components in the absorbent during the operation of the carbon capture device, thereby facilitating the accurate evaluation of the anti-degradation performance and loss cost of the absorbent, as well as the development of a more stable absorbent. The measurement method and measurement system of the present invention have good application prospects in carbon capture systems.
Description
Technical Field
The invention belongs to the field of carbon capture testing, and particularly relates to a method and a system for measuring the loss rate of an absorbent in the running process of a carbon capture device.
Background
The main carbon emission industrial sources such as coal-fired power plants, steel plants, cement plants and the like can realize large-scale carbon dioxide emission reduction through a carbon trapping technology, and among a plurality of carbon trapping technologies, the carbon trapping by a chemical absorption method is a mature technology with wide application prospect. In the carbon trapping technology of the chemical absorption method, an absorbent is a key material, an alkaline compound (generally organic amine such as ethanolamine, N-methyldiethanolamine, piperazine and the like) in the absorbent is utilized to react with CO 2 in flue gas in an absorption tower in a reversible acid-base manner to produce bicarbonate, carbonate or carbamate and the like, and then the bicarbonate, carbonate or carbamate and the like are heated in a desorption tower to release CO 2 again, so that the absorbent circulates back and forth, and continuous trapping of CO 2 is realized. However, due to the presence of O 2 in the flue gas and the higher temperature above 100 ℃ during desorption, oxidative degradation and thermal degradation of the organic amine in the absorbent can occur during long-term operation, and in addition, the absorbent has the phenomenon of escaping along with the volatilization of the flue gas, which can lead to the loss of the absorbent. The loss of the absorbent in the operation process is accurately evaluated, and the method has important significance for the development and popularization and application of the carbon capture technology of the chemical absorption method.
At present, the method for determining the loss of the absorbent in the operation process of the carbon capture device mainly comprises the steps of sampling the absorbent in the operation process, measuring the amine concentration of the sample, comparing the measured amine concentration with the newly configured amine concentration of the absorbent, and obtaining the loss of the absorbent through the change of the amine concentration. To measure the exact amount of absorbent lost by this method, the exact total amount of absorbent at the time of sampling needs to be known, the total amine mass at the time of sampling is calculated by multiplying the measured concentration by the total amount of absorbent volume, and the amount of amine consumed is calculated by comparing the total amine mass at the time of absorbent placement. The carbon trapping device needs to maintain dynamic water balance, so that the moisture in the inlet wet flue gas, the moisture in the outlet flue gas, the sewage, the condensate backwater of the desorption tower, the moisture in the exhaust gas of the CO 2 product, the supplementary moisture and the like are in a certain range, the water content in the system is continuously changed, and in the operation process of the carbon trapping device, the absorbent is distributed in equipment and pipelines comprising an absorption tower, a desorption tower, a heat exchanger and the like, so that the total volume of the absorbent is difficult to effectively measure, and the accurate loss of the absorbent is also difficult to obtain.
Disclosure of Invention
In order to overcome at least one of the problems of the prior art, it is an object of the present invention to provide a method for measuring the loss rate of an absorbent during the operation of a carbon capture apparatus, which can effectively and accurately measure the loss rate of an absorbent during the operation of a carbon capture apparatus.
The second object of the invention is to provide a system for measuring the loss rate of the absorbent during the operation of the carbon capture device.
The invention further aims to provide a measuring device for the loss rate of the absorbent during the operation of the carbon capture device.
It is a further object of the present invention to provide a carbon capture system.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the first aspect of the invention provides a method for measuring the loss rate of an absorbent in the operation process of a carbon capture device, which comprises the following steps:
introducing a marker into the absorbent to carry out carbon trapping;
during the operation of the carbon capture device, the concentration of the active component and the concentration of the marker in the absorbent under different time are obtained;
The active component loss rate of the absorbent in different time periods is calculated based on the obtained active component concentration and the marker concentration in the absorbent in different time periods.
The current common method for obtaining the loss rate of the absorbent is to measure the concentration change of the active component in the absorbent, and the method takes water as a reference point in practice, but the water in the system is volatilized or brought in by wet flue gas during the operation of the carbon capture device, so that the total water in the system is continuously changed, and the method takes water as the reference point and has larger measurement deviation. The method introduces the marker into the absorbent, the marker has good stability in the carbon trapping cycle, and the marker is used as a reference point for the concentration change of the active component in the absorbent, so that the loss rate of the active component in the absorbent in the running process of the carbon trapping device can be measured more accurately.
In some embodiments of the invention, the measuring method comprises:
introducing a marker into the absorbent to carry out carbon trapping;
Acquiring a first concentration of an active component and a first concentration of a marker in the absorbent at a first time;
Acquiring a second concentration of the active component and a second concentration of the marker in the absorbent at a second time;
And calculating the loss rate of the active component of the absorbent in the time period from the first time to the second time based on the obtained first concentration of the active component in the absorbent and the first concentration of the marker at the first time and the obtained second concentration of the active component in the absorbent and the second concentration of the marker at the second time.
In some embodiments of the present invention, the number of active component species in the absorbent is 1 to 10.
In some embodiments of the present invention, the active component contained in the absorbent comprises an amine compound, and in some embodiments of the present invention, the amine compound comprises at least one of a primary amine compound, a secondary amine compound, or a tertiary amine compound.
In some embodiments of the invention, the label comprises a water-soluble inorganic salt, in some embodiments of the invention, the water-soluble inorganic salt comprises a water-soluble carbonate, a water-soluble bicarbonate, or a combination thereof, and in some more embodiments of the invention, the water-soluble inorganic salt comprises at least one of potassium carbonate, potassium bicarbonate, sodium carbonate, or sodium bicarbonate.
The water-soluble inorganic salt is used as a marker, has the advantages of good solubility (especially solubility in an absorbent), stable property, non-volatilization, no interference to the carbon capturing performance of the absorbent and the like in the operation process of the carbon capturing device, wherein the water-soluble carbonate and the water-soluble bicarbonate are especially suitable for being used as the markers of the invention, because the two salts are dissolved in water, have extremely low vapor pressure and hardly volatilize, do not interfere with the capturing performance of the original absorbent, and can promote the carbon capturing to a certain extent, mainly because the water-soluble carbonate and the water-soluble bicarbonate can effectively promote the CO 2 absorption reaction and the CO 2 desorption reaction in the CO 2 capturing process, the water-soluble carbonate is favorable for promoting the CO 2 absorption reaction, and the water-soluble bicarbonate is favorable for promoting the CO 2 desorption reaction.
In some embodiments of the invention, the concentration of the marker in the absorbent is 0.01-5 wt%.
In theory, the type and concentration range of the marker do not affect the measurement result, but in consideration of the stability of the marker in the carbon capturing process, in order to ensure that the marker does not volatilize and degrade in the operation process of the carbon capturing device and has no negative effect on the absorption of CO 2 by the absorbent, the type and concentration range of the marker are provided, and based on the consideration of measurement precision and measurement cost, good measurement effect and carbon capturing effect can be ensured by adopting the type and concentration range of the marker, but the invention is not limited to the type and concentration range of the marker.
A second aspect of the invention provides a system for measuring the rate of loss of absorbent during operation of a carbon capture device, comprising:
a label introducing module for introducing a label into the absorbent;
The concentration acquisition module is used for acquiring the concentration of the active component and the concentration of the marker in the absorbent at different times in the operation process of the carbon capture device;
And the loss rate calculation module is used for calculating the loss rate of the active component of the absorbent in different time periods based on the obtained active component concentration and the marker concentration in the absorbent in different time periods.
A third aspect of the invention provides a measurement device for the rate of loss of absorbent during operation of a carbon capture apparatus, the measurement device comprising a processor and a memory storing computer program instructions which, when executed by the processor, implement a measurement method according to the first aspect of the invention.
A fourth aspect of the invention provides a carbon capture system comprising a measurement system as described in the second aspect of the invention or a measurement device as described in the third aspect of the invention.
The method has the beneficial effects that the marker is introduced into the absorbent and is used as a reference point for the concentration change of the active component in the absorbent, so that the loss rate of the active component in the absorbent in the operation process of the carbon capture device can be measured more accurately, the degradation resistance and the loss cost of the absorbent can be evaluated accurately, and the more stable absorbent can be developed.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It is also to be understood that the following examples are given solely for the purpose of illustration and are not to be construed as limitations on the scope of the invention, since various modifications and adaptations may be made by those skilled in the art in light of the teachings herein. The specific process parameters and the like described below are also merely examples of suitable ranges, i.e., one skilled in the art can make a selection within the suitable ranges by the description herein and are not intended to be limited to the specific data described below. The starting materials, reagents or apparatus used in the following examples and comparative examples were obtained from conventional commercial sources or by known methods unless otherwise specified.
A first aspect of an embodiment of the present invention provides a method for measuring a loss rate of an absorbent in an operation process of a carbon capture apparatus, including:
introducing a marker into the absorbent to carry out carbon trapping;
during the operation of the carbon capture device, the concentration of the active component and the concentration of the marker in the absorbent under different time are obtained;
The active component loss rate of the absorbent in different time periods is calculated based on the obtained active component concentration and the marker concentration in the absorbent in different time periods.
The current common method for obtaining the loss rate of the absorbent is to measure the concentration change of the active component in the absorbent, and the method takes water as a reference point in practice, but the water in the system is volatilized or brought in by wet flue gas during the operation of the carbon capture device, so that the total water in the system is continuously changed, and the method takes water as the reference point and has larger measurement deviation. The method introduces the marker into the absorbent, the marker has good stability in the carbon trapping cycle, and the marker is used as a reference point for the concentration change of the active component in the absorbent, so that the loss rate of the active component in the absorbent in the running process of the carbon trapping device can be measured more accurately.
In the present invention, the absorbent loss rate refers to the loss rate of the active component in the absorbent, for example, the loss rate of the amine-based absorbent refers to the loss rate of the amine component in the amine-based absorbent.
In the present invention, the method of introducing the marker may be a mixing method, i.e., the marker is mixed with the absorbent without special treatment.
In some embodiments of the invention, the measurement method comprises:
introducing a marker into the absorbent to carry out carbon trapping;
Acquiring a first concentration of an active component and a first concentration of a marker in the absorbent at a first time;
Acquiring a second concentration of the active component and a second concentration of the marker in the absorbent at a second time;
And calculating the loss rate of the active component of the absorbent in the time period from the first time to the second time based on the obtained first concentration of the active component in the absorbent and the first concentration of the marker at the first time and the obtained second concentration of the active component in the absorbent and the second concentration of the marker at the second time.
In the invention, the first time and the second time can be set according to actual needs, and the loss rate of the active component of the absorbent in any time period can be measured by the method.
In some embodiments of the invention, the active component in the absorbent is designated A 1、A2、……、An, the total active component is designated A Total (S) , the first concentration of the active component in the absorbent at a first time comprises a first concentration of the active component of A 1, a first concentration of the active component of C A1T1、A2, a first concentration of the active component of C A2T1、……、An, C AnT1, the second concentration of the active component in the absorbent at a second time comprises a second concentration of the active component of A 1, C A1T2、A2, a second concentration of the active component of C A2T2、……、An, C AnT2, and the marker is designated K, the concentration of the marker in the absorbent at a first time is C KT1, and the concentration of the marker in the absorbent at a second time is C KT2. Then, the calculation formula of the loss rate of each active component of the absorbent in the time period from the first time to the second time is as follows:
;
;
......
;
Wherein D A1、DA2、DAn is the loss rate of the active component A 1、A2、An respectively.
Taking an active component A 1 in an absorbent as an example, the deduction process of the loss rate calculation formula is as follows:
The absorbent composition at the first time is composed of total active component with mass of M A Total (S) T1 (including A 1 active component with mass of M A1T1), marker with mass of M KT1 and water with mass of M WT1, and then the concentration of the active component of A 1, C A1T1, and the concentration of the marker, C KT1, are:
(1);
(2);
The method can obtain:
(3);
The carbon capture was run for a second time, assuming that at this time the water mass was reduced by Δm W and the total active mass was reduced by Δm A Total (S) (where the a 1 active mass was reduced by Δm A1), while the label was stable in nature, not volatile nor degraded, its mass was unchanged, and was still M KT1. The absorbent composition at this time is composed of a total active component of mass M A Total (S) T1-ΔMA Total (S) (including an a 1 active component of mass M A1T1-ΔMA1), a marker of mass M KT1, and water of mass M WT1-ΔMW, and the concentration C A1T2 of the a 1 active component and the concentration C KT2 of the marker at this time are:
(4);
(5);
The method can obtain:
(6);
The loss rate of the a 1 active ingredient over the period of time from the first time to the second time is noted as D A1, with:
(7);
Substituting the formula (3) and the formula (6) into the formula (7) yields:
(8)。
as can be seen from formula (8), the absorber, after the marker is introduced, only needs to measure the concentrations of the marker and the a 1 active component before and after a period of operation, so as to obtain the accurate loss rate of the a 1 active component.
The derivation of the loss rate calculation formula for the other active component a 2、……、An in the absorbent is the same as the a 1 active component.
In contrast, if the concentration change of a 1 active ingredient and total active ingredient a Total (S) was directly measured by conventional methods alone without introducing a stable marker, the calculation procedure was as follows:
first time:
(9);
(10);
and (2) a second time:
(11);
(12);
Substituting the formula (9) and the formula (11) into the formula (7) yields:
(13);
From the formulae (10) and (12):
(14);
(15);
Substituting the formula (14) and the formula (15) into the formula (13) yields:
(16)。
As can be seen from the formula (16), the concentration change of the A 1 active component is directly measured by adopting a conventional method, the concentration of the A 1 active component and the concentration of the total active component A Total (S) before and after a period of operation are required to be obtained, the total water content and the water change amount in the system are required to be obtained, and the quality of water is continuously changed due to the conditions of volatilization or wet smoke gas and the like in the industrial operation process of the carbon capture system, so that the quality change delta M W of the water before and after the operation cannot be determined, the loss rate D A1 of the A 1 active component cannot be accurately measured, and the conventional method directly assumes that the water quality is not changed, namely delta M W is 0, which obviously leads to measurement deviation.
In some embodiments of the present invention, when the absorbent contains a plurality of active components, the total loss rate D Total (S) of the active components of the absorbent can be calculated by the following formula:
。
In some embodiments of the present invention, the number of active components and the types thereof in the absorbent may be set according to specific situations, for example, may be adjusted according to the carbon capturing conditions and the carbon capturing system, and the present invention is not limited in particular. In some embodiments of the present invention, the number n of active components in the absorbent is 1 to 10, more specifically 1 to 5, and may be any one or any range between 1, 2, 3, 4 or 5, for example.
In some embodiments of the invention, the active component contained in the absorbent comprises an amine compound, and in some embodiments of the invention, the amine compound comprises at least one of a primary amine compound, a secondary amine compound, or a tertiary amine compound. For example, the primary amine compound may be Monoethanolamine (MEA), diglycolamine (DGA), 2-amino-2-methyl-1-propanol (AMP), etc., the secondary amine compound may be Diethanolamine (DEA), diisopropanolamine (DIPA), piperazine (PZ), etc., and the tertiary amine compound may be Triethanolamine (TEA), N-Methyldiethanolamine (MDEA), etc.
In some embodiments of the invention, the marker comprises a water-soluble inorganic salt, in some embodiments of the invention, the water-soluble inorganic salt comprises a water-soluble carbonate, a water-soluble bicarbonate, or a combination thereof, and in some more embodiments of the invention, the water-soluble inorganic salt comprises at least one of potassium carbonate, potassium bicarbonate, sodium carbonate, or sodium bicarbonate.
The water-soluble inorganic salt is used as a marker, has the advantages of good solubility (especially solubility in an absorbent), stable property, no volatilization, no interference to the carbon capturing performance of the absorbent and the like in the operation process of the carbon capturing device, wherein the water-soluble carbonate and the water-soluble bicarbonate are especially suitable for being used as the markers of the invention, because the two salts are dissolved in water, have extremely low vapor pressure and hardly volatilize, do not interfere with the capturing performance of the original absorbent, and can promote the carbon capturing to a certain extent, mainly because the water-soluble carbonate and the water-soluble bicarbonate can effectively promote the CO 2 absorption reaction and the CO 2 desorption reaction in the CO 2 capturing process, the water-soluble carbonate is favorable for promoting the CO 2 absorption reaction, and the water-soluble bicarbonate is favorable for promoting the CO 2 desorption reaction, and the specific reaction can be expressed as follows:
CO 2+H2O+CO3 2-→ 2HCO3 -（CO2 absorption reaction);
2HCO 3 -→ CO2↑+H2O+CO3 2-（CO2 desorption reaction).
More specifically, the water-soluble carbonate may be potassium carbonate, sodium carbonate, or a combination thereof, and the water-soluble bicarbonate may be potassium bicarbonate, sodium bicarbonate, or a combination thereof. Taking potassium carbonate and potassium bicarbonate as examples, the following reactions can occur during the CO 2 capture process as markers:
CO 2+H2O+K2CO3→ 2KHCO3（CO2 absorption reaction);
2KHCO 3→ CO2↑+H2O+K2CO3（CO2 desorption reaction).
In some embodiments of the invention, the concentration of the marker in the absorbent is 0.01-5 wt%, in some embodiments of the invention, the concentration of the marker in the absorbent is 0.1-0.5 wt%, and may be, for example, any value or range between any two of 0.1wt%, 0.2wt%, 0.3wt%, 0.4wt%, or 0.5 wt%.
In theory, the type and concentration range of the marker do not affect the measurement result, but in consideration of the stability of the marker in the carbon capturing process, in order to ensure that the marker does not volatilize and degrade in the operation process of the carbon capturing device and has no negative effect on the absorption of CO 2 by the absorbent, the type and concentration range of the marker are provided, and based on the consideration of measurement precision and measurement cost, good measurement effect and carbon capturing effect can be ensured by adopting the type and concentration range of the marker, but the invention is not limited to the type and concentration range of the marker.
A second aspect of an embodiment of the present invention provides a system for measuring a loss rate of an absorbent during operation of a carbon capture apparatus, including:
a label introducing module for introducing a label into the absorbent;
The concentration acquisition module is used for acquiring the concentration of the active component and the concentration of the marker in the absorbent at different times in the operation process of the carbon capture device;
And the loss rate calculation module is used for calculating the loss rate of the active component of the absorbent in different time periods based on the obtained active component concentration and the marker concentration in the absorbent in different time periods.
In some embodiments of the invention, a marker introduction module may be disposed at an absorber inlet of the carbon capture for introducing a marker into the absorber at the absorber inlet.
In some embodiments of the invention, a concentration acquisition module may be disposed at the absorber inlet of the carbon capture for acquiring the active component concentration and the marker concentration in the absorber at the absorber inlet.
In some embodiments of the invention, the concentration acquisition module may sample the absorbent and then measure the concentration of the active ingredient and the concentration of the marker in the sampled sample, the sampling position may be along the line of the absorbent inlet of the absorption tower, and the concentration measurement method may be ion chromatography and/or gas chromatography.
The measurement system provided in the second aspect of the embodiment of the present invention may perform the measurement method provided in the first aspect of the embodiment of the present invention, and its implementation principle and beneficial effects are similar.
A third aspect of an embodiment of the present invention provides a device for measuring the rate of loss of absorbent during operation of a carbon capture apparatus, the device comprising a processor and a memory storing computer program instructions, the processor executing the computer program instructions to implement a method of measuring as in the first aspect of the present invention.
The measuring device provided in the third aspect of the embodiment of the present invention may perform the measuring method provided in the first aspect of the embodiment of the present invention, thereby implementing the measuring method in the first aspect of the embodiment of the present invention and the measuring system in the second aspect of the present invention.
The measuring system and the measuring equipment provided by the embodiment of the invention are based on the measuring method of the first aspect of the embodiment of the invention, and can simply, conveniently and accurately measure the loss rate of the absorbent in the running process of the carbon capture device.
A fourth aspect of the invention provides a carbon capture system comprising a measurement system as in the second aspect of the invention, or a measurement device as in the third aspect of the invention.
The measuring system or the measuring equipment provided by the invention is beneficial to accurately evaluating the degradation resistance and the loss cost of the absorbent and developing a more stable absorbent, so that the carbon capturing system with better carbon capturing performance and more stable operation is obtained.
Specific examples are provided below to illustrate the invention in further detail.
Example 1
The method for measuring the loss rate of the absorbent in the operation process of the carbon capture device comprises the following specific steps:
The amine components in the carbon capture absorbent were Piperazine (PZ) and 2-amino-2-methyl-1-propanol (AMP) in amounts of 26wt% and 14wt%, respectively, 20 tons of the absorbent was added to an industrial carbon capture device, and a marker K 2CO3 was added in an amount of 0.1005 ton, and the absorbent was sampled S 1 after the addition of the marker, wherein the marker concentration was 0.5wt%, the potassium ion concentration C K1 = 0.2829wt%, the amine component PZ concentration C PZ1 =23.88 wt%, and the amine component AMP concentration C AMP1 =15.92 wt%. After the absorbent was run for 6 months, S 2 was sampled at the inlet of the absorption column, and after the assay analysis was performed on S 2, the potassium ion concentration C K2 = 0.2363wt% was measured by ion chromatography, the amine component PZ concentration C PZ2 =16.58 wt% was measured by gas chromatography, and the amine component AMP concentration C AMP2 =11.36 wt%.
The loss rate of the amine component PZ at the time of sampling of sample S 1 is:
;
when sample S 1 was sampled, the loss rate of the amine component AMP was:
;
When sample S 1 is sampled, the total amine loss rate of the absorbent is as follows:
。
Comparative example 1
For the carbon capture plant run of example 1, existing conventional method 1 (assuming that the water quality before and after the carbon capture run was unchanged, i.e.=0), The amine component loss rate was calculated as follows:
When sample S 1 was sampled, the loss rate of the amine component PZ was:
;
when sample S 1 was sampled, the loss rate of the amine component AMP was:
;
When sample S 1 is sampled, the total amine loss rate of the absorbent is as follows:
。
Comparative example 2
For the carbon capture plant run of example 1, the amine component loss rate was calculated using the existing conventional method 2 (assuming the total mass of the absorber was unchanged before and after the carbon capture run), as follows:
When sample S 1 was sampled, the loss rate of the amine component PZ was:
;
when sample S 1 was sampled, the loss rate of the amine component AMP was:
;
When sample S 1 is sampled, the total amine loss rate of the absorbent is as follows:
。
To obtain the actual total amine loss rate of the absorber, the carbon capture system was stopped for 6 months of operation, the total amount and concentration of the absorber in the system were measured, and the actual value of the total amine loss rate of the absorber was calculated to be 16.82wt%. It can be seen that, compared with comparative examples 1-2, the loss rate obtained by the method of example 1 is closer to the actual value, and has higher measurement accuracy.
From the above example 1, it can be seen that the measuring method of the present invention, which is not required to measure the total amount and variation of the water component as in the conventional method, can obtain the exact amine component loss rate by introducing the marker into the absorbent, and only measuring the concentrations of the marker and the amine component before and after a certain period of operation. The measuring method of the invention is not influenced by the quality change of the water component in the running process of the carbon trapping device, and the total water in the carbon trapping system is not required to be measured, so that the measuring process is simple and convenient, and the measuring result is accurate.
In addition, K 2CO3 is adopted as a marker, is dissolved in water, has extremely low vapor pressure, is hardly volatilized, does not interfere with the trapping performance of the original absorbent, can promote carbon trapping to a certain extent, and is particularly beneficial to promoting CO 2 absorption reaction and improving carbon trapping efficiency. Under the same carbon trapping conditions such as liquid-gas ratio, the composition of the absorbent is 24wt percent PZ, 16wt percent AMP and 60wt percent water, the CO 2 trapping rate of the absorbent is 91.1 percent, and the composition of the absorbent is 24wt percent PZ, 16wt percent AMP, 0.5wt percent K 2CO3 and 59.5wt percent water, and the CO 2 trapping rate of the absorbent is 91.4 percent. It can be seen that the CO 2 capturing rate of the carbon capturing system is improved after K 2CO3 is added as a marker.
In summary, the marker is introduced into the absorbent and is used as a reference point for the concentration change of the active component in the absorbent, so that the loss rate of the active component in the absorbent in the operation process of the carbon capture device can be measured more accurately, further, the degradation resistance and the loss cost of the absorbent can be evaluated accurately, and the more stable absorbent can be developed.
Claims (10)
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