A Low-Energy Two-Phase CO2 Capture Method

Abstract

The invention discloses a low-energy two-phase CO2 capture method, comprising the following steps: (1) mixing a triazole metal salt with a solvent to prepare an absorbent, leading an exhaust gas containing CO2 to the absorbent, generating a product of fine grains by the triazole metal salt after absorbing the CO2, participating the product from a solution, so as to form a two-phase system; (2) separating the two-phase system obtained in the step (1), so as to obtain a sediment and filtrate, reusing the filtrate in the step (1); (3) carrying out heating regeneration treatment on the sediment obtained in the step (2), reusing the obtained triazole metal salt in the step (1), collecting CO2 after condensing the obtained gaseous phase, reusing the solvent generated by condensation in the step (1), wherein the mass percent of the absorbent is 10-40%. The CO2 capture and separation method has the advantages of being low in viscosity, fast in absorption / desorption speed, high in selectivity, large in absorption capacity, and especially low in regeneration energy consumption, and can be recycled.

Description

technical field [0001] The invention relates to acid gas absorption technology, in particular to a low energy consumption two-phase capture CO 2 Methods. Background technique [0002] In recent years, global warming, a climate crisis, has attracted more and more attention as a worldwide problem related to the living environment of all human beings. Since the industrial revolution, human production and life have been increasingly dependent on fossil raw materials. In current industrial production, fossil fuels provide 85% of the energy source. Due to the widespread use of fossil fuels, large amounts of CO 2 is emitted into the atmosphere, CO in the atmosphere 2 The concentration of carbon dioxide has increased from 270ppm before the industrial revolution to the current 390ppm, which is considered to be the main cause of the greenhouse effect. CO 2 Emission reduction and control has become one of the biggest technological challenges in the 21st century. Therefore, carbon...

AI Technical Summary

Problems solved by technology

However, since Ca(OH) 2 Solubility in water is very small, lime water has little effect on CO 2 The absorption capacity of calcium carbonate is low; and the regeneration energy consumption of high temperature calcined calcium carbonate is very high (179.2kJ / mol CO 2 ), so the application of this two-phase capture method is severely restricted, limewater in CO 2 Little practical application in capturing

[0005]Because of the above-mentioned shortcomings in existing capture technologies and methods, the development of new and efficient CO2 capture methods is in the ascendant in recent years

Images