Alpha-amino acid salt absorbent for capturing carbon dioxide

A carbon dioxide and amino acid salt technology, applied in reagents, combustible gas purification, chemical instruments and methods, etc., can solve problems such as large environmental impact, low absorption temperature, easy oxidative degradation, etc., achieve less volatilization and operation loss, and improve saturated absorption Capacity, cheap effect

Pending Publication Date: 2021-02-02
SINOPEC NANJING RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional alcohol amine solutions (such as MEA, DMEA, MDEA, etc.) are prone to oxidative degradation, high energy consumption due to low absorption temperature, and large-scale use has a large impact on the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 30 mL of amino acid salt solution prepared with 32% potassium alanine, 10% N-methylpyrrolidone, 5% ethylenediamine, and the rest in water, and place it in an oxidative degradation kettle, and fill it with oxygen at about 1.47 MPa , the temperature was raised to 120 ° C, the stirring was started, and the temperature was lowered to room temperature after 8 h, and the pressure of the oxidative degradation tank was observed to be 1.21 MPa.

Embodiment 2

[0030] Take 30 mL of 32% potassium sarcosinate, 10% N-methylpyrrolidone, 5% ethylenediamine, and the rest of the amino acid salt solution prepared by water, put it in an oxidative degradation kettle, and fill it with oxygen at about 1.46 MPa , the temperature was raised to 120°C, the stirring was started, and the temperature was lowered to room temperature after 8 h. It was observed that the pressure of the oxidative degradation tank was 1.18 MPa.

Embodiment 3

[0032] Take 30 mL of amino acid salt solution prepared with 35% potassium 2-aminobutyrate, 10% N-methylpyrrolidone, 5% ethylenediamine, and the rest in water, and place it in an oxidative degradation kettle, and fill it with about 1.50 MPa Oxygen, the temperature was raised to 120 ° C, the stirring was started, and the temperature was lowered to room temperature after 8 h, and the pressure of the oxidative degradation tank was observed to be 1.23 MPa.

[0033] From the comparison of Examples 1, 2, 3 and Comparative Example 1, the absorbent of the present invention has better anti-oxidative degradation performance under the same conditions.

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PUM

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Abstract

The invention relates to the field of carbon dioxide capture, and relates to an alpha-amino acid salt absorbent for capturing carbon dioxide. The absorbent comprises the following components in percentage by volume: 15 to 40 percent of alpha-amino acid salt, 5 to 15 percent of dissolution promoter, and 2 to 8 percent of absorption promoter. The brand-new alpha-amino acid salt absorbent is formed by mixing the specific main absorbent alpha-amino acid salt, the absorption promoter, the dissolution promoter and water according to a proper ratio. Compared with the prior art, the absorbent has thefollowing beneficial effects and effects: the amino acid salt has extremely low vapor pressure and low volatilization and operation loss; good anti-oxidative degradation performance is realized, and the service life is greatly prolonged; and the dissolution promoter is added, so that the solubility of the amino acid salt is greatly improved, and the carbon dioxide saturated absorption capacity ofthe solvent is greatly improved.

Description

technical field [0001] The invention relates to the field of carbon dioxide capture, and relates to a class of α-amino acid salt absorbents for capturing carbon dioxide. Background technique [0002] With the development of human industry, human demand for fossil fuels is also increasing. More than 85% of the energy comes from fossil fuels. The use of fossil fuels releases energy and emits CO into the atmosphere. 2 . CO 2 As a greenhouse gas, its accumulation in the atmosphere increases rapidly, causing global warming. However, when the new energy technology is not yet mature, and the dependence of human beings on fossil fuels is difficult to change in a short period of time, how to achieve low-carbon emissions after the use of fossil fuels has become a research hotspot. Capture CO from CO2 emission sources 2 The technology of compressing and storing it is called carbon dioxide capture and storage (CCS) technology, and governments and energy companies have high expectati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14C10L3/10C10K1/00
CPCB01D53/1475B01D53/1493C10K1/005C10L3/104B01D2252/504B01D2252/602Y02P20/151Y02C20/40
Inventor 杨继毛松柏叶宁郭本帅黄钟斌季燕黄汉根
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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