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Preparation of ionic solvent phase change absorption system for carbon dioxide capture

A technology of ionic solvents and carbon dioxide, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve problems such as corrosion equipment, complicated preparation process of alcohol amine solution, and high regeneration energy consumption

Inactive Publication Date: 2021-07-09
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to prepare an ionic solvent phase change absorption system with large absorption capacity, good cycle regeneration performance and low regeneration energy consumption in the process of capturing carbon dioxide, so as to solve the problem of complicated preparation process of traditional alcohol amine solution and low regeneration energy consumption. Large, corroded equipment and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Step 1) take by weighing 14.623g (0.1mol) of triethylenetetramine and 7.507g (0.1mol) of glycine and place it in a beaker, add a certain amount of deionized water to mix the two into a clear liquid, and transfer the mixed solution to In the three-necked flask, place the flask in a constant temperature stirring water bath at 25°C, open the condensate pipe and turn on the electromagnetic stirring device, and feed N 2 protection, the mixture was reacted at 30°C for 8 hours to obtain the crude ionic liquid. The obtained ionic liquid was taken out, and a vacuum rotary evaporator was used to perform rotary evaporation at 70° C. to remove unreacted reactants and part of water. Then, the rotary evaporated ionic liquid was dried in a vacuum oven at 70°C for 24 hours to obtain the target ionic liquid [TETA][Gly], which was sealed and stored for later use.

[0016] Step 2) Dissolve [TETA][Gly] in the selected tertiary amine solution DEEA (3:7 molar ratio), add a certain amount of...

Embodiment 2

[0018] Step 1) Weigh 14.623g (0.1mol) of triethylenetetramine and 14.619g (0.1mol) of lysine in a beaker, add a certain amount of deionized water to mix the two into a clear liquid, and mix the solution Transfer to a three-necked flask, place the flask in a constant temperature stirring water bath at 25°C, open the condensate pipe and turn on the electromagnetic stirring device, and introduce N 2 protection, the mixture was reacted at 30°C for 8 hours to obtain the crude ionic liquid. The obtained ionic liquid was taken out, and a vacuum rotary evaporator was used to perform rotary evaporation at 70° C. to remove unreacted reactants and part of water. The ionic liquid after rotary evaporation was then dried in a vacuum oven at 70°C for 24 hours to obtain the target ionic liquid [TETA][Lys], which was sealed and stored for future use.

[0019] Step 2) Dissolve [TETA][Lys] in the selected tertiary amine solution DEEA (3:7 molar ratio), add a certain amount of water to completel...

Embodiment 3

[0021] Step 1) Weigh 14.623g (0.1mol) of triethylenetetramine and 17.42g (0.1mol) of arginine in a beaker, add a certain amount of deionized water to mix the two into a clear liquid, and mix the solution Transfer to a three-necked flask, place the flask in a constant temperature stirring water bath at 25°C, open the condensate pipe and turn on the electromagnetic stirring device, and introduce N 2 protection, the mixture was reacted at 30°C for 8 hours to obtain the crude ionic liquid. The obtained ionic liquid was taken out, and a vacuum rotary evaporator was used to perform rotary evaporation at 70° C. to remove unreacted reactants and part of water. The ionic liquid after rotary evaporation was then dried in a vacuum oven at 70°C for 24 hours to obtain the target ionic liquid [TETA][Arg], which was sealed and stored for future use.

[0022] Step 2) Dissolve [TETA][Arg] in the selected tertiary amine solution DEEA (3:7 molar ratio), add a certain amount of water to complete...

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Abstract

According to the invention, a [TETA] [Gly] ionic liquid is synthesized through a one-step method, and is compounded with the DEEA solution to form an ionic solvent phase change absorption system, wherein the phase change absorption system has high absorption capacity and cyclic utilization performance at the same time. The method is simple and efficient, and triethylene tetramine and glycine are mixed in an equal molar ratio, stirred at a constant temperature, subjected to rotary evaporation and vacuum drying and then mixed with DDEA according to a certain molar ratio to form an absorption system. The absorption system has excellent absorption performance at a high temperature, regeneration energy consumption is greatly reduced, the absorption system can replace a traditional alcohol amine solution to a certain extent to capture carbon dioxide, so that the absorption system has a wide industrial application prospect.

Description

technical field [0001] The invention relates to the preparation of an ion-solvent phase-change absorption system for carbon dioxide capture in the chemical industry, which has relatively high absorption performance and regeneration performance, and at the same time has low regeneration energy consumption. Utilizing the designability of ionic liquids, amino groups are introduced into the anions and cations of ionic liquids at the same time, and the ionic liquids are dissolved in tertiary amine solutions with low viscosity to obtain a carbon dioxide absorption system with both large absorption capacity and low regeneration energy consumption. It has broad application prospects in the field of capturing carbon dioxide. Background technique [0002] in the CO 2 In the comparison of various capture technologies, the chemical absorption method is more widely used, and the most mature chemical absorption method is the alkanolamine aqueous solution. 2 Compared with other absorbent...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D53/1475B01D2252/30B01D2252/20415Y02A50/20Y02C20/40
Inventor 周晨杰于光认陈晓春
Owner BEIJING UNIV OF CHEM TECH
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