Ternary non-aqueous phase absorption system for carbon dioxide capture and application of ternary non-aqueous phase absorption system

Abstract

The invention discloses application of a ternary non-aqueous phase absorption system for carbon dioxide capture. The absorption system is prepared by mixing 2-amino-2-methyl-1-propanol (AMP), hydroxyethyl ethylenediamine (AAEA) and n-methylpyrrolidone (NMP). A high-boiling-point organic solvent used in the ternary system has low specific heat capacity and enthalpy of vaporization, is capable of effectively reducing regeneration power consumption and has high energy-saving potential. Moreover, since a steric hindrance effect of the AMP is introduced, the viscosity of the ternary system is reduced, and the system is kept as homogeneous transparent liquid before and after CO2 absorption. Furthermore, since multi-level amine contains multiple amino, the system has ultra-high absorption load and absorption rate. In a word, the ternary system in the invention maintains the advantage of a non-aqueous phase absorbent, namely low regeneration energy consumption, also has the advantages of highCO2 absorption rate and absorption load and low solvent loss rate, and has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide emission reduction and control, and in particular relates to a ternary non-aqueous phase absorption system for carbon dioxide capture and its application. Background technique [0002] With the development of industry, a large amount of anthropogenic carbon dioxide (CO 2 ) emissions lead to CO in the atmosphere 2 The concentration continues to rise, and the resulting global warming has become one of the major environmental problems facing the world today. The key to curbing global warming lies in CO 2 control and reduction. The chemical absorption method based on organic amine is a relatively mature CO 2 capture method, but the traditional organic amine absorption method has high regeneration energy consumption. Taking a monoethanolamine solution (30wt% MEA) with a mass fraction of 30% as an example, its thermal desorption energy consumption is as high as 3.7GJ / ton CO 2 . Excessive re...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a ternary non-aqueous phase absorption system for carbon dioxide capture and its application, to solve the high Viscosity problem, also solves the problem of low efficiency and high energy consumption in the absorption process

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