Method for mixing amido ionic liquid and ethanol amine in micro-channel for adsorbing carbon dioxide

A carbon dioxide and ionic liquid technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, can solve problems such as strong corrosion of equipment, difficulty in ensuring equipment safety, and high volatility.

Active Publication Date: 2018-11-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ammonia water is highly volatile during use and highly corrosive to equipment. It is difficult to guarantee the safety of equipment use, and it is easy t

Method used

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  • Method for mixing amido ionic liquid and ethanol amine in micro-channel for adsorbing carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The absorption process is shown in the figure. The microchannel reactor has a diameter of 2mm and a length of 30cm. The operating conditions are: temperature 25°C, pressure 1atm, and the mass ratio of amine-based ionic liquid to ethanolamine in the absorbent is 3:7. Carbon dioxide enters from the gas inlet as a gas phase, and the gas phase flow rate is controlled at 20mL min -1 , the mixed solution of amine-based ionic liquid and ethanolamine enters from the liquid inlet as an absorbent, and the liquid phase flow rate is 200mL·h -1 , and the removal rate of carbon dioxide is 0.953 at this time, which shows that the technology of absorbing carbon dioxide by this method can significantly remove carbon dioxide in the material compared with the traditional method. Desorption is carried out under certain conditions to remove the carbon dioxide contained therein. The desorption operating conditions are: temperature 110°C, pressure 1atm, time 2h, and the absorbent can be recy...

Embodiment 2

[0018] The absorption process is shown in the figure. The microchannel reactor has a diameter of 2mm and a length of 30cm. The operating conditions are: temperature 25°C, pressure 1atm, and the mass ratio of amine-based ionic liquid to ethanolamine in the absorbent is 2:8. Carbon dioxide enters from the gas inlet as a gas phase, and the gas phase flow rate is controlled at 20mL min -1 , the mixed solution of amine-based ionic liquid and ethanolamine enters from the liquid inlet as an absorbent, and the liquid phase flow rate is 200mL·h -1 , the removal rate of carbon dioxide is 0.888 at this time, indicating that compared with the traditional method, the technology of absorbing carbon dioxide by this method can significantly remove carbon dioxide in the material. Desorption is carried out under certain conditions to remove the carbon dioxide contained therein. The desorption operating conditions are: temperature 110°C, pressure 1atm, time 2h, and the absorbent can be recycled...

Embodiment 3

[0024] The absorption process is shown in the figure. The microchannel reactor has a diameter of 2mm and a length of 30cm. The operating conditions are: temperature 25°C, pressure 1atm, and the mass ratio of amine-based ionic liquid to ethanolamine in the absorbent is 1:9. Carbon dioxide enters from the gas inlet as a gas phase, and the gas phase flow rate is controlled at 20mL min -1 , the mixed solution of amine-based ionic liquid and ethanolamine enters from the liquid inlet as an absorbent, and the liquid phase flow rate is 200mL·h -1 , the removal rate of carbon dioxide is 0.821 at this time, which shows that the technology of absorbing carbon dioxide by this method can significantly remove carbon dioxide in the material compared with the traditional method. The absorbent rich in carbon dioxide flowing out from the reactor is heated and reduced Desorption is carried out under certain conditions to remove the carbon dioxide contained therein. The desorption operating cond...

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Abstract

The invention discloses a method for mixing amido ionic liquid and ethanol amine in a micro-channel for adsorbing carbon dioxide, and belongs to the technical field of adsorption and separation. The operation conditions of a micro-channel reactor is that temperature is 25DEG C, and pressure is 1atm; carbon dioxide and absorbent are respectively conveyed to a gas inlet and a liquid inlet accordingto set speed, and gas and liquid have the same flowing direction; a gas phase and a liquid phase are in full contact in the micro-channel, and the carbon dioxide is adsorbed; the mass ratio of the amido ionic liquid to the ethanol amine in the absorbent is 1:9-3:7. A gas phase speed change range is 0.0187-0.187m.s<-1>, and a liquid speed change range is 0.0285-0.285 m.s<-1>. The adsorbent which adsorbs the carbon dioxide can be re used after being desorbed. Therefore, the problems of energy consumption and environment pollution can be effectively solved.

Description

technical field [0001] The invention relates to a method for absorbing carbon dioxide in a mixed solution of an amine-based ionic liquid and ethanolamine in a microchannel reactor. The absorbent is a mixed solution of amine-based ionic liquid and ethanolamine, and the adopted amine-based ionic liquid is 1-aminoethyl-3-methylimidazolium tetrafluoroborate. It belongs to the technical field of absorption separation. Background technique [0002] As the main greenhouse gas, carbon dioxide mainly comes from excessive emissions from coal-fired power plants and industries, which has caused the increasingly serious global greenhouse effect, and this issue has attracted widespread attention around the world. At the same time, carbon dioxide is a safe and easy-to-obtain carbon resource, which has a wide range of applications in life. Therefore, the implementation of CO2 capture, utilization and storage is of paramount importance. Many other methods of absorbing carbon dioxide have ...

Claims

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Application Information

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IPC IPC(8): B01D53/18B01D53/14
CPCB01D53/1475B01D53/1493B01D53/18Y02A50/20Y02C20/40
Inventor 雷志刚马维华高慧
Owner BEIJING UNIV OF CHEM TECH
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