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Deep-eutectic solvent system capable of efficiently capturing CO2, and preparation method and application of deep-eutectic solvent system

A deep eutectic solvent and system technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of weak absorption capacity of deep eutectic solvents, and achieve good recycling effect, high absorption capacity, and high efficiency The effect of reversible absorption

Active Publication Date: 2018-12-14
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above results show that the deep eutectic solvent has a good effect on CO 2 The absorption capacity is weak

Method used

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  • Deep-eutectic solvent system capable of efficiently capturing CO2, and preparation method and application of deep-eutectic solvent system
  • Deep-eutectic solvent system capable of efficiently capturing CO2, and preparation method and application of deep-eutectic solvent system
  • Deep-eutectic solvent system capable of efficiently capturing CO2, and preparation method and application of deep-eutectic solvent system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1. Efficient capture of CO 2 Preparation of the deep eutectic solvent system

[0027] High-efficiency CO capture 2 The deep eutectic solvent system, specifically as follows:

[0028] 1) Tetraethylammonium hydroxide aqueous solution is added in the round-bottomed flask, then add equimolar imidazoles. The reaction was stirred at room temperature for 2 hours. After reaction finishes, heat rotary evaporation removes moisture, and vacuum-drying, obtains the Tetraethylammonium imidazolium salt ([N 2222 ][Im]). Tetraethylammonium imidazolium salt and ethylene glycol (EG) are heated and stirred at 70°C according to the molar ratio of 1:2 until the mixed system becomes liquid, and then cooled to room temperature to obtain a deep eutectic solvent , denoted as [N 2222 ][Im]-EG(1:2).

[0029] 2) Tetraethylammonium hydroxide aqueous solution is added in the round-bottomed flask, then add equimolar imidazole. The reaction was stirred at room temperature for 2 hours. ...

Embodiment 2

[0035] In a glass test tube with an internal diameter of 10mm, add respectively about 2.0g of the deep eutectic solvent prepared in Example 1 of the present invention [N 2222 ][Im]-EG(1:2), then slowly introduce CO 2 Gas, the flow rate is 50mL / min, the absorption gas pressure is 0.1MPa, and the control temperature is 25°C. During the absorption process, it is weighed by an electronic analytical balance, and the mass of the glass test tube is weighed at intervals until there is no change. Calculated to absorb CO per gram of solvent 2 0.129 grams.

Embodiment 3

[0037] In a glass test tube with an internal diameter of 10mm, add respectively about 2.0g of the deep eutectic solvent prepared in Example 1 of the present invention [N 2222 ][Triz]-EG(1:2), then slowly introduce CO 2 Gas, the flow rate is 50mL / min, the absorption gas pressure is 0.1MPa, and the control temperature is 25°C. During the absorption process, it is weighed by an electronic analytical balance, and the mass of the glass test tube is weighed at intervals until there is no change. Calculated to absorb CO per gram of solvent 2 0.125 grams.

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Abstract

The invention discloses a deep-eutectic solvent system capable of efficiently capturing CO2, and a preparation method and application of the deep-eutectic solvent system. The deep-eutectic solvent system capable of efficiently capturing CO2 is composed of a quaternary ammonium salt and / or a quaternary phosphonium salt, and ethylene glycol. The preparation method of the deep-eutectic solvent systemcomprises the following steps: mixing the quaternary ammonium salt and / or the quaternary phosphonium salt with the ethylene glycol, carrying out heating until the system is completely changed into liquid, and carrying out cooling to room temperature to obtain the deep-eutectic solvent system capable of efficiently capturing CO2. The method for absorbing carbon dioxide by utilizing the deep-eutectic solvent system capable of efficiently capturing CO2 specifically comprises the following steps: slowly introducing gas containing carbon dioxide into a container containing the deep-eutectic solvent system capable of efficiently capturing CO2, controlling the pressure and temperature, carrying out weighing in an absorption process, and carrying out absorption until the quality of the containeris not changed again. The deep-eutectic solvent system has relatively high absorption capacity for CO2, the recycling effect is good, and efficient reversible absorption of CO2 can be realized.

Description

technical field [0001] The invention relates to a high-efficiency capture CO 2 The deep eutectic solvent system and its preparation method and application belong to the field of gas separation. Background technique [0002] At present, the main energy sources still rely on fossil fuels such as coal, oil, and natural gas, which produce a large amount of CO during the combustion process. 2 Released into the air. With the development of society and economy, the consumption of fossil fuels is increasing, and the CO emitted into the atmosphere every year 2 Up to 30 billion tons. A CO beyond nature's own ability to coordinate 2 Emissions not only cause the greenhouse effect, but also cause significant deterioration of the ecological environment. Therefore, CO 2 The capture, separation, transformation and utilization of greenhouse gases such as greenhouse gases have received attention from all walks of life. [0003] Improve the atmospheric environment and control CO in the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1412B01D53/1418B01D53/1425B01D53/1475B01D53/1493B01D2252/2023B01D2252/205B01D2252/2053B01D2252/504Y02A50/20Y02C20/40
Inventor 杨德重崔鸽吕萌戚洪彬陈洁
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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