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Ionic liquid carbon dioxide absorbent

An ionic liquid and carbon dioxide technology, applied in gas treatment, separation methods, dispersed particle separation, etc., can solve problems such as volatilization loss, unfavorable purification, etc., and achieve the effect of good absorption, solving large volatilization loss, and good application prospects.

Inactive Publication Date: 2021-10-12
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

[0004] During the operation of the device, the organic amine solvent often causes a large amount of volatilization loss due to its inherent vapor pressure, and it is also not conducive to the recovery of CO in the regeneration gas. 2 further purification of
In addition, the hydroxyl group in alkanolamine is a group that is easily oxidized, so it is degraded and consumed in large quantities under the action of thermal oxygen, which in turn brings environmental problems

Method used

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  • Ionic liquid carbon dioxide absorbent
  • Ionic liquid carbon dioxide absorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The method of the present embodiment has the following steps:

[0024] (1) Configure a total of 2000ml of 3mol / L monoethanolamine aqueous solution, and the rest is deionized water for continuous testing

[0025] (2) Measure the alkalinity of the purified gas condensate, and the acid gas content in the lean and rich liquid of the absorbent (the difference is used to indicate the capture capacity).

[0026] See the table below for the results.

Embodiment 2

[0028] The method of the present embodiment has the following steps:

[0029] (1) Configure a total of 2000ml of 4mol / L monoethanolamine aqueous solution, and the rest is deionized water for continuous testing

[0030] (2) Measure the alkalinity of the purified gas condensate, and the acid gas content in the lean and rich liquid of the absorbent (the difference is used to indicate the capture capacity).

[0031] See the table below for the results.

Embodiment 3

[0033] The method of the present embodiment has the following steps:

[0034] (1) Prepare a total of 2000ml of 2mol / L ionic liquid aqueous solution (obtained from the reaction of sarcosine and tetramethylammonium hydroxide), the rest is deionized water, and conduct continuous tests

[0035] (2) Measure the alkalinity of the purified gas condensate, and the acid gas content in the lean and rich liquid of the absorbent (the difference is used to indicate the capture capacity).

[0036] See the table below for the results.

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Abstract

The invention belongs to the technical field of gas separation, and relates to an ionic liquid solution for capturing carbon dioxide, wherein the solution keeps good absorption and regeneration performance, the problems that a traditional organic amine absorbent is large in volatilization loss and easy to degrade can be solved, and the ionic liquid solution has good application prospects in the field of carbon dioxide capturing.

Description

technical field [0001] The invention relates to an ionic liquid carbon dioxide absorbent, which is better than MEA in terms of trapping capacity and energy consumption, and has low operating cost. In addition, the invention is environmentally friendly and can significantly reduce the discharge of decarbonized waste liquid. So as to create better economic and social benefits. Therefore, it shows a good application prospect in the chemical industry such as gas purification or separation. Background technique [0002] In modern industry, the use of fossil fuels is still the main energy source. The acid gases emitted during the combustion process have a serious impact on the environment and climate. Among them, CO 2 Although the direct harmfulness of nitrogen oxides is not as strong as that of strong acid gases such as nitrogen oxides and sulfur dioxide, the global greenhouse effect caused by its huge emissions has caused frequent occurrences of various extreme weather and vari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/62B01D53/78B01D53/96
CPCB01D53/62B01D53/78B01D53/96B01D2257/504B01D2251/80Y02A50/20Y02C20/40
Inventor 黄钟斌江洋洋陈曦
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD