CN114053835A - Composite potassium carbonate absorbent for removing carbon dioxide and application thereof - Google Patents
Composite potassium carbonate absorbent for removing carbon dioxide and application thereof Download PDFInfo
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- CN114053835A CN114053835A CN202111334271.7A CN202111334271A CN114053835A CN 114053835 A CN114053835 A CN 114053835A CN 202111334271 A CN202111334271 A CN 202111334271A CN 114053835 A CN114053835 A CN 114053835A
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- potassium carbonate
- carbon dioxide
- absorbent
- removing carbon
- acid
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- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 title claims abstract description 122
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910000027 potassium carbonate Inorganic materials 0.000 title claims abstract description 61
- 239000002250 absorbent Substances 0.000 title claims abstract description 54
- 230000002745 absorbent Effects 0.000 title claims abstract description 54
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 46
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 43
- 239000002131 composite material Substances 0.000 title claims abstract description 41
- 230000003213 activating effect Effects 0.000 claims abstract description 32
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 24
- 238000010521 absorption reaction Methods 0.000 claims description 24
- 239000002253 acid Substances 0.000 claims description 20
- 150000001412 amines Chemical class 0.000 claims description 20
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 16
- 239000002994 raw material Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 5
- 239000004327 boric acid Substances 0.000 claims description 5
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000002608 ionic liquid Substances 0.000 claims description 3
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000003895 organic fertilizer Substances 0.000 claims description 2
- 239000002243 precursor Substances 0.000 claims 1
- 239000012190 activator Substances 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- HJTAZXHBEBIQQX-UHFFFAOYSA-N 1,5-bis(chloromethyl)naphthalene Chemical compound C1=CC=C2C(CCl)=CC=CC2=C1CCl HJTAZXHBEBIQQX-UHFFFAOYSA-N 0.000 description 2
- GOLCXWYRSKYTSP-UHFFFAOYSA-N arsenic trioxide Inorganic materials O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229960002449 glycine Drugs 0.000 description 2
- 235000013905 glycine and its sodium salt Nutrition 0.000 description 2
- 231100000086 high toxicity Toxicity 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- JVUYWILPYBCNNG-UHFFFAOYSA-N potassium;oxido(oxo)borane Chemical compound [K+].[O-]B=O JVUYWILPYBCNNG-UHFFFAOYSA-N 0.000 description 2
- NVIFVTYDZMXWGX-UHFFFAOYSA-N sodium metaborate Chemical compound [Na+].[O-]B=O NVIFVTYDZMXWGX-UHFFFAOYSA-N 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- VVLAIYIMMFWRFW-UHFFFAOYSA-N 2-hydroxyethylazanium;acetate Chemical compound CC(O)=O.NCCO VVLAIYIMMFWRFW-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- ALTWGIIQPLQAAM-UHFFFAOYSA-N metavanadate Chemical compound [O-][V](=O)=O ALTWGIIQPLQAAM-UHFFFAOYSA-N 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1475—Removing carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/30—Ionic liquids and zwitter-ions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/60—Additives
- B01D2252/602—Activators, promoting agents, catalytic agents or enzymes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Abstract
The invention discloses a composite potassium carbonate absorbent for removing carbon dioxide and application thereof. The composite potassium carbonate absorbent consists of the following materials in percentage by mass: 15-40% of potassium carbonate, 0.1-30% of an activating agent and 60-85% of water. The activating agent adopted by the invention effectively improves the speed of removing carbon dioxide by the composite potassium carbonate absorbent; the activator adopted by the invention is not easy to volatilize. The composite potassium carbonate absorbent has good thermal stability. The composite potassium carbonate absorbent has simple conditions and is easy to realize in industrial application.
Description
Technical Field
The invention belongs to the technical field of gas separation, and particularly relates to a composite potassium carbonate absorbent for removing carbon dioxide and application thereof.
Background
Since the industrial revolution, the concentration of carbon dioxide in the atmosphere is gradually increased year by year, which causes global greenhouse effect, further causes the problems of glacier melting, sea level rising and the like. The current common carbon dioxide removal technologies mainly comprise: chemical absorption, physical absorption, adsorption and membrane separation, with chemical adsorption being the most mature in industrial applications. The separation of carbon dioxide from a mixed gas by using a potassium carbonate solution as an absorbent is one of the main methods for removing carbon dioxide in industrial application. However, the potassium carbonate solution absorbs carbon dioxide slowly under the conditions of normal pressure and low temperature, and an activating agent is usually added to activate the potassium carbonate solution in practical application.
According to the Chinese patent CN102764578A, metaborate is added into potassium carbonate absorption liquid as an activating agent, and metavanadate is added as a corrosion inhibitor, so that the absorbent has high toxicity. Chinese patent CN102512932A reports that one of arsenic trioxide, boric acid, diethanolamine and aminoacetic acid is added as an activator in potassium carbonate absorption liquid, but the solution of arsenic trioxide has high toxicity and carcinogenicity and is limited to use, and the improvement effect of the boric acid, diethanolamine and aminoacetic acid which are independently used as the activators is not obvious. The Chinese patent CN112295365A takes the ionic liquid as an activating agent to improve the absorption and desorption rate and the absorption capacity of the potassium carbonate solution, but the preparation conditions of the ionic liquid are relatively complex, so that the cost of the activating agent is high.
Disclosure of Invention
The invention provides a composite potassium carbonate absorbent for removing carbon dioxide and application thereof to solve the technical problems at present. The activating agent adopted in the composite potassium carbonate absorbent effectively improves the rate of removing carbon dioxide by the composite potassium carbonate absorbent, and in addition, the activating agent is not easy to volatilize; the prepared composite potassium carbonate absorbent has good thermal stability.
In order to achieve the above purpose, the specific technical scheme of the invention is as follows:
a composite potassium carbonate absorbent for removing carbon dioxide is prepared from the following raw materials in percentage by mass: 15-40% of potassium carbonate, 0.1-30% of an activating agent and 60-85% of water, wherein the sum of the contents of white powder in the total mass is 100%.
As a preferred embodiment in the present application, the absorbent is prepared from the following raw materials in percentage by mass: 30% of potassium carbonate, 6% of activating agent and 64% of water, wherein the sum of the total mass percentage is 100%.
As a preferred embodiment herein, the activator is formulated from an organic amine and an acid. The organic amine is one or a mixture of more of ethanolamine, diethanolamine and N-methyldiethanolamine; the acid is any one or a mixture of more of hydrochloric acid, sulfuric acid, acetic acid and boric acid.
As a better embodiment in the application, the mass ratio of the organic amine to the acid is 5: 1-1: 1; more preferably 2: 1.
As a preferred embodiment in the present application, the absorbent is prepared from the following raw materials in percentage by mass: 30% of potassium carbonate, 4% of ethanolamine, 2% of acetic acid and 64% of water, wherein the sum of the total mass percentages is 100%.
As a preferred embodiment in the present application, the preparation method of the composite potassium carbonate absorbent is as follows:
1) weighing the raw materials in proportion;
2) the potassium carbonate, the activating agent and the water are stirred and mixed at room temperature to prepare the water-based paint.
As a better implementation mode in the application, the composite potassium carbonate absorbent is used for removing carbon dioxide, and can improve the absorption rate of the carbon dioxide and the initial CO2The absorption rate is high and reaches 23.3 mL/min. .
As a better embodiment in the application, the composite potassium carbonate absorbent is applied under the conditions that the temperature for absorbing carbon dioxide is 20-80 ℃ and the pressure is 0.01-2 MPa.
Compared with the prior art, the invention has the following beneficial effects:
the composite potassium carbonate absorbent disclosed by the invention has the advantages that the activating agent is added, so that the rate of absorbing carbon dioxide by the potassium carbonate absorbent is greatly increased, the circulation volume of the absorbent and the height of the absorption tower are further reduced, and the low-cost removal of the carbon dioxide is realized.
The composite potassium carbonate absorbent has the advantages of good chemical and thermal stability and low volatility due to the addition of the activating agent, and reduces the loss of the composite potassium carbonate absorbent in the absorption desorption circulation process.
And thirdly, the corrosion of the composite potassium carbonate absorbent is weaker than that of the potassium carbonate absorbent taking alcamines or organic acids as activators by adding the activators, so that the corrosion to equipment is reduced.
Drawings
FIG. 1 is a graph of reaction data for example 1;
FIG. 2 is a graph of reaction data for example 2;
FIG. 3 is a graph of reaction data for example 3;
FIG. 4 is a graph of the reaction data for example 4.
Detailed Description
A composite potassium carbonate absorbent for removing carbon dioxide is prepared from the following raw materials in percentage by mass: 15-40% of potassium carbonate, 0.1-30% of an activating agent and 60-85% of water, wherein the sum of the total mass percentage is 100%.
Preferably, the composite potassium carbonate absorbent for removing carbon dioxide is prepared from the following raw materials in percentage by mass: 30% of potassium carbonate, 6% of activating agent and 64% of water, wherein the sum of the total mass percentage is 100%.
Preferably, the activator is formulated from an organic amine and an acid; the organic amine is one or a mixture of more of ethanolamine, diethanolamine and N-methyldiethanolamine; the acid is any one or a mixture of more of hydrochloric acid, sulfuric acid, acetic acid and boric acid.
Preferably, the activating agent is prepared from organic amine and acid, and the mass ratio of the organic amine to the acid is 5: 1-1: 1.
Preferably, the activating agent is prepared from organic amine and acid, and the mass ratio of the organic amine to the acid is 2: 1.
Preferably, the preparation method of the composite potassium carbonate absorbent for removing carbon dioxide comprises the following steps:
1) weighing the raw materials in proportion;
2) the potassium carbonate, the activating agent and the water are stirred and mixed evenly at room temperature to prepare the water-based organic fertilizer.
Preferably, the composite potassium carbonate absorbent for removing carbon dioxide is applied to remove carbon dioxide.
Preferably, the initial CO2The absorption rate is high and can reach 23.3 mL/min.
Preferably, the absorbent is used for removing carbon dioxide at the temperature of 20-80 ℃ and under the pressure of 0.01-2 MPa.
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that, in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Example 1
The absorption effects of the composite carbonate alkali absorbents added with different activators are compared under the same reference condition, and potassium carbonate solutions with the mass fraction of 30% are used in the absorption rate comparison experiments, wherein the potassium carbonate solutions comprise different activators. Respectively selecting potassium metaborate, sodium metaborate (potassium metaborate and sodium metaborate are not in the patent claims) and ethanolamine-acetic acid mixed liquor (the mass ratio of ethanolamine to acetic acid is 2:1) as activating agents, wherein the mass fraction of the activating agents is 3%. The mixed gas with the mass fraction of 15 percent of carbon dioxide and the mass fraction of 85 percent of nitrogen is absorbed by using the composite potassium carbonate absorbent at the temperature of 40 ℃ and under normal pressure, and the absorption rate of the carbon dioxide is shown in figure 1.
As can be seen from FIG. 1, the activator prepared according to the present application has a better effect of increasing the absorption rate of carbon dioxide than metaborate.
Example 2
In order to compare the absorption effects of composite potassium carbonate absorbents of different compositions under the same reference conditions, the absorption rate comparison experiments all use a 30% by mass potassium carbonate solution containing different types of activators (the compositions of the absorbents are shown in the following table). The mass ratio of the organic amine to the acid in the activator is 2: 1. Then, the mixed gas containing 10% by mass of carbon dioxide and 90% by mass of nitrogen was absorbed at 40 ℃ under normal pressure using a composite potassium carbonate absorbent, and the absorption rate of carbon dioxide was as shown in fig. 2 and the following table.
As can be seen from the data in the table, the composite potassium carbonate absorbent with the addition of the activator has initial CO absorption compared with potassium carbonate absorption2The absorption rate is obviously improved.
Example 3
Selecting organic amine as ethanolamine, acid as acetic acid, and preparing the activating agent according to the mass ratio of the organic amine to the acid of 5:1, 4:1, 3:1, 2:1 and 1:1 respectively. And (2) uniformly mixing and stirring an activating agent and a potassium carbonate solution to prepare the composite potassium carbonate absorbent, wherein the mass fraction of the potassium carbonate is 30%, and the mass fraction of the activating agent is 6%. Then, the mixed gas containing 10% by mass of carbon dioxide and 90% by mass of nitrogen was absorbed at 40 ℃ under normal pressure using a composite potassium carbonate absorbent, and the absorption rate of carbon dioxide was as shown in fig. 3.
Example 4
Organic amine is selected as ethanolamine, acid is selected as acetic acid, and the activating agent is prepared according to the mass ratio of the organic amine to the acid of 2: 1. And (2) uniformly mixing and stirring an activating agent and a potassium carbonate solution to prepare the composite potassium carbonate absorbent, wherein the mass fraction of the potassium carbonate is 30%, and the mass fractions of the activating agent are respectively 3%, 6%, 9% and 12%. Then, the mixed gas containing 10% by mass of carbon dioxide and 90% by mass of nitrogen was absorbed at 40 ℃ under normal pressure using a composite potassium carbonate absorbent, and the absorption rate of carbon dioxide was as shown in fig. 4.
The foregoing basic embodiments of the invention and their various further alternatives can be freely combined to form multiple embodiments, all of which are contemplated and claimed herein. In the scheme of the invention, each selection example can be combined with any other basic example and selection example at will. Numerous combinations will be known to those skilled in the art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The composite potassium carbonate absorbent for removing carbon dioxide is characterized by being prepared from the following raw materials in percentage by mass: 15-40% of potassium carbonate, 0.1-30% of an activating agent and 60-85% of water, wherein the sum of the total mass percentage is 100%.
2. The composite potassium carbonate absorbent for removing carbon dioxide according to claim 1, which is characterized in that the absorbent is prepared from the following raw materials in percentage by mass: 30% of potassium carbonate, 6% of activating agent and 64% of water, wherein the sum of the total mass percentage is 100%.
3. The composite potassium carbonate absorbent for removing carbon dioxide as claimed in claim 1 or 2, which is characterized in that: the activating agent is prepared from organic amine and acid; the organic amine is one or a mixture of more of ethanolamine, diethanolamine and N-methyldiethanolamine; the acid is any one or a mixture of more of hydrochloric acid, sulfuric acid, acetic acid and boric acid.
4. The composite potassium carbonate absorbent for removing carbon dioxide as claimed in claim 1 or 2, which is characterized in that: the activating agent is prepared from organic amine and acid, and the mass ratio of the organic amine to the acid is 5: 1-1: 1.
5. The composite potassium carbonate absorbent for removing carbon dioxide as claimed in claim 3, which is characterized in that: the absorbent is prepared from the following raw materials in percentage by mass: 30% of potassium carbonate, 4% of ethanolamine, 2% of acetic acid and 64% of water, wherein the sum of the total mass percentages is 100%.
6. The composite potassium carbonate absorbent for removing carbon dioxide as claimed in claim 4, which is characterized in that: the activating agent is prepared from organic amine and acid, and the mass ratio of the organic amine to the acid is 2: 1.
7. The preparation method of the composite potassium carbonate absorbent for removing carbon dioxide as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps:
1) weighing the raw materials in proportion;
2) the potassium carbonate, the activating agent and the water are stirred and mixed evenly at room temperature to prepare the water-based organic fertilizer.
8. The use of the composite potassium carbonate absorbent for removing carbon dioxide as claimed in any one of claims 1 to 5, wherein: the absorbent is an ionic liquid precursor and is used for removing carbon dioxide.
9. Use according to claim 8, characterized in that: the temperature of the absorbent for removing carbon dioxide is 20-80 ℃, and the pressure is 0.01-2 MPa.
10. Use according to claim 8, characterized in that: initial CO2The absorption rate is high and reaches 23.3 mL/min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114904365A (en) * | 2022-05-31 | 2022-08-16 | 西南化工研究设计院有限公司 | Liquid-liquid phase separation absorbent for carbon dioxide separation |
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