Preparation method of diamine ternary eutectic solvent and application of diamine ternary eutectic solvent to efficient capture of SO2

Abstract

The invention discloses a preparation method of a diamine ternary eutectic solvent and application of the diamine ternary eutectic solvent to efficient capture of SO2. According to the invention, different amine substances and different proportions thereof in the diamine ternary eutectic solvent are regulated and controlled, and the diamine ternary eutectic solvent with different amine substances and different proportions is designed and synthesized and is applied to SO2 absorption. Amino groups provided by diamine substances in the diamine ternary eutectic solvent and ethylene glycol form hydrogen bonds, strong charge interaction is formed between the hydrogen bonds and SO2, and thus efficient capture of SO2 is achieved, the diamine ternary eutectic solvent is used as an absorbent to absorb SO2 gas, the absorption pressure is 0-1.5 bar, the absorption temperature is 0-80 DEG C, and the absorption time is 1-6 h. After absorption, SO2 is easy to desorb, the desorption temperature is 50-100 DEG C, and the desorption time is about 2-6 hours. Compared with a traditional SO2 trapping method, the highest absorption capacity can reach 0.82 g SO2/g DES.

Description

technical field [0001] The invention relates to a preparation method of a diamine ternary deep eutectic solvent and an efficient capture of SO 2 Methods. Background technique [0002] SO 2 It is a colorless, acidic gas with a strong pungent smell, and it is also a common air pollutant, which mainly comes from the combustion of fossil fuels. When SO in the air 2 Too high a concentration can cause diseases of the human respiratory system, and also form acid rain, which corrodes buildings and endangers the natural environment. [0003] However, pure SO 2 It has huge uses in industry, such as bleaching agent for cloth and preservative for food. And pure SO 2 The price is relatively high. Therefore, the realization of SO in industrial flue gas 2 The efficient capture, on the one hand, can avoid a large amount of SO 2 Emissions cause air pollution, and on the other hand, it can realize the "turning waste into treasure" of flue gas. So far, the flue gas desulfurization me...

AI Technical Summary

Problems solved by technology

A variety of SO 2 Absorbed IL, conventional IL absorbs SO 2 The mode of action is achieved by weak physical interaction, resulting in a relatively low absorption capacity

Although they have certain advantages over traditional lyes, these ILs still have some problems, such as expensive raw materials, cumbersome synthesis steps, and difficult to degrade, which limit their large-scale application.

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