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CO2 absorption liquid based on eutectic solvent, and preparation method and application of CO2 absorption liquid

A low eutectic solvent and absorption liquid technology, applied in the field of gas absorption preparation, can solve the problems of high solvent loss, small absorption, strong volatility, etc., and achieve the effects of low solvent volatility, large absorption, and improved absorption

Inactive Publication Date: 2020-09-01
CHINA HUADIAN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the defects in the prior art that the absorption of carbon dioxide is small and the solvent loss is high due to its strong volatility, thereby providing a CO2 based on deep eutectic solvent. 2 Absorption liquid and its preparation method and application

Method used

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  • CO2 absorption liquid based on eutectic solvent, and preparation method and application of CO2 absorption liquid
  • CO2 absorption liquid based on eutectic solvent, and preparation method and application of CO2 absorption liquid
  • CO2 absorption liquid based on eutectic solvent, and preparation method and application of CO2 absorption liquid

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033] This example provides a deep eutectic solvent-based CO 2 The absorption liquid comprises 15g deep eutectic solvent and 15g monoethanolamine, wherein the deep eutectic solvent includes L-arginine and glycerol that the molar ratio is 1:5;

[0034] The above CO 2 The preparation method of absorbing liquid, comprises the following steps,

[0035] Mix L-arginine and glycerol according to the proportion, and keep stirring at 80°C until a uniform and transparent pure liquid phase substance is formed. After cooling to room temperature, a deep eutectic solvent is obtained. After adding monoethanolamine, stir under airtight conditions After 3h get CO 2 Absorb fluid.

Embodiment 2

[0037] This example provides a deep eutectic solvent-based CO 2 Absorption liquid, comprises 15g deep eutectic solvent and 15g monoethanolamine, and wherein, deep eutectic solvent comprises L-arginine and ethylene glycol that molar ratio is 1:5;

[0038] The above CO 2 The preparation method of absorbing liquid, comprises the following steps,

[0039] Mix L-arginine and ethylene glycol in proportion, and keep stirring at 80°C until a uniform and transparent pure liquid phase substance is formed. After cooling to room temperature, a deep eutectic solvent is obtained. After adding monoethanolamine, stir under airtight conditions After 3h get CO 2 Absorb fluid.

Embodiment 3

[0041] This example provides a deep eutectic solvent-based CO 2 Absorption liquid, comprises 10g deep eutectic solvent and 20g monoethanolamine, and wherein, deep eutectic solvent comprises L-lysine and glycerol that the molar ratio is 1:5;

[0042] The above CO 2 The preparation method of absorbing liquid, comprises the following steps,

[0043] Mix L-lysine and glycerol according to the proportion, and keep stirring at 80°C until a uniform and transparent pure liquid phase substance is formed. After cooling to room temperature, a deep eutectic solvent is obtained. After adding monoethanolamine, stir under airtight conditions After 3h get CO 2 Absorb fluid.

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Abstract

The invention belongs to the technical field of gas absorption preparation, and particularly relates to CO2 absorption liquid based on a eutectic solvent and a preparation method and application of the CO2 absorption liquid. The CO2 absorption liquid comprises an alcohol amine compound and a eutectic solvent in a mass ratio of (1-4): 1, the CO2 absorption liquid has the advantages of large CO2 absorption amount, low solvent volatility, small loss and good thermal stability; the eutectic solvent can form a cage bag due to a uniform and stable hydrogen bond network of the eutectic solvent; immobilizing small molecular alcohol amine in a hydrogen bond network; on one hand, the advantages of low saturated vapor pressure and stable properties of the eutectic solvent are retained, and on the other hand, the alcohol amine compound can be fixed in a hydrogen bond network of the eutectic solvent, the number of absorption sites of the absorption liquid is increased, and the carbon dioxide load per unit mass is increased, so that the absorption amount of the carbon dioxide absorption liquid is increased, and the solvent loss is reduced.

Description

technical field [0001] The invention belongs to the technical field of gas absorption preparation, in particular to a deep eutectic solvent-based CO 2 Absorbent and its preparation and application. Background technique [0002] Since the global industrial revolution, the carbon dioxide content in the atmosphere has increased dramatically, 1°C higher than before the industrial revolution, and this figure will reach 1.5°C by 2030. Carbon dioxide is one of the main components of greenhouse gases that cause global warming, contributing 55% to the greenhouse effect. The carbon dioxide emitted by power plants after burning fossil fuels accounts for 30% of the global emissions from burning the same fuels. Therefore, carbon dioxide capture in coal-fired power plants has become the industry with the greatest potential for carbon dioxide capture. Currently, the most widely used carbon dioxide capture technology is chemical absorption capture technology. [0003] At present, the mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1475B01D53/1493B01D2252/504Y02A50/20Y02C20/40
Inventor 孙路长苏军划王桦王凯亮吴冲张丽亚文潇贤汪洋王争荣何佳宋春风连少翰张士明陈志荣
Owner CHINA HUADIAN ENG
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