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Ionic liquid activated post-combustion carbon dioxide capture solvent

A carbon dioxide and ionic liquid technology, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of difficult regeneration and low absorption efficiency of alcohol amines, and achieve non-degradable, low regeneration energy consumption and less consumption Effect

Inactive Publication Date: 2016-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Regeneration is the reverse process of the absorption process, therefore, if a single alcohol amine is mixed with CO 2 Strong force, good absorption performance, but often difficult to regenerate
On the contrary, the absorption efficiency of alkanolamine with good regeneration performance is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Capture solvent composition: 5wt% ionic liquid, glycine anion as anion, n-butylamine cation as cation, 30wt% diglycolamine, and deionized water as the rest. Feed gas CO 2 Content 12.5%, gas-liquid ratio 200, heating capacity 15kcal / h, CO 2 The capture rate is 88.9%.

Embodiment 2

[0015] Capture solvent composition: 2wt% ionic liquid, sarcosine anion as anion, triethylamine cation as cation, 30wt% 2-(methylamino)-ethanol, and deionized water as the rest. Feed gas CO 2 The content is 12.5%, the gas-liquid ratio is 223, the heating capacity is 13kcal / h, and the CO2 capture rate is 91.2%.

Embodiment 3

[0017] The composition of the trapping solvent: ionic liquid 20wt%, the anion is valine anion, the cation is n-butylamine cation, 2-(diethylamino)-ethanol 20wt%, and the rest is deionized water. Feed gas CO 2 The content is 12.5%, the gas-liquid ratio is 245, the heating capacity is 15kcal / h, and the CO2 capture rate is 90.3%.

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Abstract

Belonging to the technical field of capture of carbon dioxide in gas, the invention relates to a capture solvent for capturing carbon dioxide in a post-combustion carbon dioxide gas source and application. The capture solvent includes alcohol amine, an ionic liquid activator and deionized water, wherein the alcohol amine is one or more of 2-amino-2-methyl-1-propanol, 2-(methylamino)-ethanol, 2-(ethylamino)-ethanol, 2-(diethylamino)-ethanol, 2-(2-hydroxyethyl)-piperidine, diglycolamine, dimethylamino-2-propanol, and triethanolamine. The negative ion of the ionic liquid activator has an amino acid structure, the structural formula of amino acid is H2N-R-COOH (R=CnH2n, n=1-5), and the positive ion is one or more of organic amine salt positive ion and organic alcohol amine positive ion. The capture solvent provided by the invention has the advantages of low regeneration energy consumption, fast absorption rate and the like, also consumes little ionic liquid, has strong stability, and is not easy to degrade. Therefore, the capture solvent has very good prospect in the field of carbon dioxide capture after large-scale combustion.

Description

technical field [0001] The invention belongs to the technical field of capturing carbon dioxide after combustion in gas, and relates to a compound solvent and an application method for capturing carbon dioxide in a source of carbon dioxide after combustion. Background technique [0002] The capture of carbon dioxide has become a "hot" issue of global concern. Carbon dioxide capture technologies include solvent absorption, adsorption, cryogenic separation, and membrane separation. Considering both capture effect and operating cost, the chemical absorption method is currently the lowest cost method for capturing carbon dioxide in flue gas. The chemical absorption method uses the nature of carbon dioxide as an acidic gas, absorbs it with a weakly alkaline substance, and then heats it to desorb it, thereby achieving the removal of CO2. 2 the goal of. Typical chemical absorbents are organic alcohol amine solutions. Organic alcohol amine methods mainly include monoethanolamine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/62
CPCY02A50/20Y02C20/40
Inventor 毛松柏江洋洋郑园园陈曦丁雅萍黄汉根
Owner CHINA PETROLEUM & CHEM CORP
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