Anhydrous suspension absorbent for carbon dioxide and absorption method thereof

Abstract

The invention particularly relates to an anhydrous suspension absorbent for carbon dioxide and an absorption method of the anhydrous suspension absorbent, and belongs to the technical field of carbon dioxide trapping. Theanhydrous suspension absorbent comprisestetramethyl ammonium glycine and sulfone. The method comprises the following steps: preparing an absorbent in a suspended state by taking functional ionic liquid, namely tetramethyl ammonium glycine ([N1111] [Gly]) as a main absorbent and taking sulfone as a solvent; the ionic liquid [N1111] [Gly] and the sulfone cannot be completely dissolved mutually, a suspension is formed in the sulfone, the specific surface area of [N1111] [Gly] liquid drops is increased, the viscosity of the sulfone is lower than that of the ionic liquid, CO2 is easier to diffuse in the sulfone, and compared with pure ionic liquid on the whole, the mixed absorbent enhances the mass transfer efficiency of CO2 and has higher CO2 absorption rate and higher absorption capacity.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide capture, and in particular relates to an anhydrous suspension absorbent of carbon dioxide and an absorption method thereof. Background technique [0002] In recent years, as the greenhouse effect has become increasingly prominent, the capture, utilization and storage of greenhouse gases, especially carbon dioxide, have drawn great attention from the scientific community and governments. The intensification of the greenhouse effect leads to global warming, which will lead to a series of ecological and environmental problems, and will aggravate regional natural disasters, which will also have a non-negligible impact on human survival and development. [0003] Carbon dioxide mainly comes from the combustion of fossil fuels, concentrated in industries such as industry, power and transportation. Carbon capture is considered to be an important method to effectively reduce the amount of carbon di...

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Problems solved by technology

[0006] The purpose of this application is to provide an anhydrous suspension absorbent of carbon dioxide and its absorption method to solve the problem of low absorption capacity, slow absorption rate, and low absorption rate of traditional organic amine aqueous solutions. Large loss of solvent and disadvantages of existing aqueous absorbents for subsequent treatment of water pollution

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