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Method for trapping nitric oxide by utilizing eutectic solvent

A technology of deep eutectic solvent and nitric oxide, which is applied in the chemical field, can solve problems such as difficult application and increased viscosity of absorbent, and achieve the effect of improving absorption efficiency and efficient absorption

Inactive Publication Date: 2018-07-24
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Recently, our research group reported the use of 1,3-dimethylurea deep eutectic solvent and 1,3-dimethylthiourea deep eutectic solvent to absorb nitric oxide, but due to the absorption of nitric oxide gas After that, the viscosity of the absorbent increases (the viscosity value is generally greater than 100mPa s), which is difficult to apply to actual production

Method used

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  • Method for trapping nitric oxide by utilizing eutectic solvent
  • Method for trapping nitric oxide by utilizing eutectic solvent
  • Method for trapping nitric oxide by utilizing eutectic solvent

Examples

Experimental program
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Effect test

Embodiment 1

[0026] In an absorber with an inner diameter of Φ10mm, add 1 g of the deep eutectic solvent tetrazole / tetrabutylphosphine chloride (1:1, molar ratio), operate under normal pressure, control the absorption temperature at 30°C, and absorb equilibrium The time is 8 hours, and weighing shows that the absorption capacity of nitric oxide in the deep eutectic solvent is 2.1 mol / mol deep eutectic solvent.

Embodiment 2-13

[0028] Similar to Example 1, the nitric oxide gas pressure is controlled to be 0.1MPa, the absorption temperature is 30° C., and the type of deep eutectic solvent is changed. The results of nitric oxide absorption are as follows (Table 1):

[0029] Table 1 Effect of different hydrogen bond donors on nitric oxide trapping

[0030]

[0031] Embodiment 7-13 is the comparative example of triazole / choline chloride, imidazole / choline chloride, urea / choline chloride as deep eutectic solvent in table 1, as can be seen from comparative example, Selecting triazole, imidazole and urea as the hydrogen bond donor of the deep eutectic solvent is not as good as the present application.

Embodiment 14-25

[0033] Similar to Example 1, the nitric oxide gas pressure is controlled to be 0.1MPa, the absorption temperature is 30° C., and the type of deep eutectic solvent is changed. The results of nitric oxide absorption are as follows (Table 2):

[0034] Table 2 Effects of different hydrogen bond acceptors and ratios on nitric oxide capture

[0035]

[0036]

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Abstract

The invention provides a method for trapping nitric oxide by utilizing a eutectic solvent. The method comprises a step of absorbing nitric oxide by the eutectic solvent, wherein the eutectic solvent comprises tetrazole which is used as a hydrogen bond donor. Compared with a conventional solvent for absorbing nitric oxide, the method has the advantages that tetrazole in the eutectic solvent is easily subjected to deprotonation, and reacts with the nitric oxide to generate -NONO, so that the nitric oxide gas can be efficiently absorbed. The nitric oxide absorber is simple to synthesize, is smallin viscosity, and is high in absorbing efficiency which can be as high as the level that 2.1 mol of nitric oxide is trapped by every mol of the eutectic solvent as absorption amount is increased andviscosity of the absorber is reduced; and moreover, the adsorption effect is good.

Description

technical field [0001] The invention relates to a chemical method, in particular to a method for trapping nitric oxide by using a tetrazolium deep eutectic solvent. Background technique [0002] With the development of science and technology, the problem of environmental pollution is becoming more and more serious, among which air pollution also directly affects people's health and the stability of the living environment. As the main component of air pollution, nitrogen oxides (NOx) are likely to cause environmental problems such as acid rain and photochemical smog. In addition, they also participate in the formation of PM2.5, which damages human health and the balance of the environment. Most of the nitrogen oxides emitted by humans are produced by the use of various fossil fuels, especially coal burned at high temperatures, and the proportion of nitrogen monoxide in the nitrogen oxides produced is as high as 90%. In industry, nitrogen oxides (NOx) are often reduced to nit...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D53/14B01D53/1418B01D53/1425B01D53/1493B01D2252/2053B01D2257/404
Inventor 张吕鸿孙永利魏光森澹台晓伟姜斌黄兆贺
Owner TIANJIN UNIV
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