A kind of sulfur dioxide gas absorbent

Abstract

The invention discloses a sulfur dioxide gas absorbent. The sulfur dioxide gas absorbent is composed of aqueous solutions of hydramine ionic liquid and furoic acid functionalized ionic liquid at a mixing molar ratio of 1:5-10; furoic acid is applied to substituting traditional carboxylic acid to synthesize biological anionic functionalized ionic liquid, which is then compounded with the hydramineionic liquid into the mixed absorbent; oxygen atoms of the furan ring of the furoic acid functionalized ionic liquid and the hydrogen atoms of the amino group of the hydramine ionic liquid can form hydrogen bonds, then the residual hydrogen atoms in the amino group can be highly active and urgent to form hydrogen bonds with the oxygen atoms in sulfur dioxide; mixed synergistic effects of the hydramine ionic liquid and the furoic acid functionalized ionic liquid can facilitate absorption of the sulfur dioxide gas. Besides, the sulfur dioxide gas absorbent is high in SO2 absorbency and selectivity and good in regenerative property and stability and facilitates recycling.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a sulfur dioxide gas absorbent. Background technique [0002] With the rapid development of modern industry, the human demand for energy is increasing, and a large amount of fossil fuels such as coal, oil, and natural gas have been exploited and utilized, but a large amount of acid gas (such as SO 2 , CO 2 、H 2 S, etc.) are discharged into the atmosphere, and the resulting air pollution, acid rain, smog, greenhouse effect, etc. are seriously threatening the environment on which human beings depend and their own health. [0003] SO 2 It is a gaseous pollutant with a large content and a wide range of influences in the current air pollutants. It mainly comes from the combustion of fossil fuels, as well as the roasting and smelting of sulfide ores; in addition, thermal power plants, non-ferrous metal smelters , sulfuric acid plants, oil refineries, and coal-fired indus...

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Problems solved by technology

[0004] SO 2 It is a colorless gas with a strong irritating smell, which has a strong poisonous effect on human respiratory organs, and can also cause harm by invading the human body through the skin through pores or entering the human body through food and drinking water through the digestive tract; SO 2 It is the main pollutant that forms acid rain. Acid rain is harmful to aquatic ecosystems, agricultural ecosystems, buildings and materials, and human health. In addition, smog has occurred frequently in recent years, especially in northern heavy industrial areas. It not only Seriously affect air quality, cause harm to transportation, industrial and agricultural production, and at the same time induce respiratory system, cardiovascular and cerebrovascular diseases and even cancer, endangering human health; smog is a mixture of fog and haze, and haze weather refers to fine particles Low visibility caused by aerosols under high humidity conditions, studies have found that smog contains high concentrations of sulfates, and NO in the moisture adsorbed by atmospheric fine particles 2 with SO 2 The chemical reaction of SO is the main formation path of sulfate in the current smog; SO in the air 2 , NOx itself can not only pollute the atmosphere, reduce visibility, and form haze weather, but also can form secondary haze-causing particles through atmospheric chemical reactions, thereby increasing the probability of haze weather; more importantly, SO 2 The continuous discharge of gaseous pollutants such as gaseous pollutants and the rapid increase in the cost of economic losses caused by the aggravation of acid rain and smog have become an important environmental factor restricting my country's economic development. Therefore, the development of new and efficient SO 2 Absorbent has economic and social significance

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