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Deep eutectic solvent based on aprotic organic matter and its method for efficiently absorbing sulfur dioxide

A low eutectic solvent, sulfur dioxide technology, applied in chemical instruments and methods, separation methods, dispersed particle separation and other directions, can solve the problems of restricted use, high production cost, complicated synthesis steps, etc., and achieve high absorption capacity and recycling effect. Good, efficient reversible absorption effect

Active Publication Date: 2020-05-22
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis steps of functionalized ionic liquids such as imidazoles and aminos are cumbersome, which leads to their high production costs and limits their use in industrial processes.

Method used

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  • Deep eutectic solvent based on aprotic organic matter and its method for efficiently absorbing sulfur dioxide
  • Deep eutectic solvent based on aprotic organic matter and its method for efficiently absorbing sulfur dioxide
  • Deep eutectic solvent based on aprotic organic matter and its method for efficiently absorbing sulfur dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1, efficient capture of SO 2 Preparation of the deep eutectic solvent system

[0025] High-efficiency capture SO was prepared respectively by the following methods 2 The deep eutectic solvent system, specifically as follows:

[0026] 1) Heat and stir 1-methyl-3-ethylimidazolium chloride and succinonitrile (SN) at 80°C in a molar ratio of 1:1 until the mixed system becomes liquid, then cool to room temperature , the deep eutectic solvent can be obtained, denoted as [Emim][Cl]-SN(1:1).

[0027] 2) Heat and stir 1-methyl-3-ethylimidazolium chloride salt and succinonitrile (SN) at 80°C in a molar ratio of 1:2 until the mixed system becomes liquid, then cool to room temperature , the deep eutectic solvent can be obtained, denoted as [Emim][Cl]-SN(1:2).

[0028] 3) Heat and stir 1-methyl-3-ethylimidazolium chloride salt and succinonitrile (SN) at 80°C according to the molar ratio of 1:4 until the mixed system becomes liquid, then cool to room temperature , the de...

Embodiment 2

[0031] In a glass test tube with an inner diameter of 10 mm, add about 1.0 g of the deep eutectic solvent [Emim][Cl]-SN (1:1) prepared in Example 1 of the present invention, and then slowly introduce SO 2 Gas, the flow rate is 50mL / min, the absorption gas pressure is 0.1MPa, and the control temperature is 20°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 SO per gram of solvent 2 1.13 grams.

Embodiment 3

[0033] In a glass test tube with an inner diameter of 10 mm, add about 1.0 g of the deep eutectic solvent [Emim][Cl]-SN (1:2) prepared in Example 1 of the present invention, and then slowly introduce SO 2 Gas, the flow rate is 50mL / min, the absorption gas pressure is 0.1MPa, and the control temperature is 20°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 SO per gram of solvent 2 0.96 grams.

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Abstract

The invention provides a eutecticevaporate solvent system based on a non-proton organic matter. The eutecticevaporate solvent system is prepared from imidazolium salt and the non-proton organic matterSN (Succinonitrile), wherein a molar ratio of the imidazolium salt to the SN is 1 : (1 to 8). The invention also provides a method for absorbing / capturing SO2. The method comprises the following stepof: enabling the eutecticevaporate solvent system to be in contact with a SO2-containing gas for absorption, thus absorbing / capturing the SO2. The eutecticevaporate solvent adopted by the invention has higher absorption capacity to the SO2, has a good recycling effect and is capable of realizing efficient and reversible absorption on the SO2.

Description

technical field [0001] The invention belongs to the field of gas separation, and in particular relates to a deep eutectic solvent based on aprotic organic matter and a method for efficiently absorbing sulfur dioxide using the same. Background technique [0002] Sulfur dioxide (SO 2 ), as a major air pollutant, can cause acid rain and acid fog, seriously endangering the ecological environment and people's health. SO 2 It mainly comes from the combustion of fossil fuels such as coal, oil, and natural gas in the process of industrial production. At present, industrial control of SO in flue gas 2 The emission methods mainly include flue gas desulfurization technologies such as dry method, semi-dry method and wet method. Among them, the most widely used in industry is the limestone-gypsum flue gas desulfurization technology in the wet process. This method has higher desulfurization efficiency. However, the limestone-gypsum method also has many shortcomings, such as the gene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/18
CPCB01D53/1481B01D53/1493B01D53/18B01D2252/205
Inventor 杨德重吕萌崔鸽
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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