A stable and low-energy regeneration deep eutectic solvent for carbon dioxide removal

Abstract

The present invention relates to CO 2 The field of adsorption and capture, specifically relates to a stable and low-energy regenerated deep eutectic solvent for removing carbon dioxide, which is composed of a hydrogen bond donor and a hydrogen bond acceptor, and the hydrogen bond donor and the hydrogen bond acceptor are connected through hydrogen bonds Association to form a ternary eutectic eutectic mixture, wherein the hydrogen bond acceptor is ammonium chloride or ammonium hydrochloride-ammonium chloride, and the hydrogen bond donor is composed of organic amines and polyols, which can effectively increase the reaction speed with carbon dioxide , increase the adsorption capacity; the low co-solvent prepared by the invention can effectively improve the adsorption and capture efficiency of carbon dioxide and reduce the regeneration energy consumption.

Description

technical field [0001] The present invention relates to CO 2 In the field of adsorption and capture, it specifically relates to a low eutectic solvent that can be regenerated with stable and low energy consumption to remove carbon dioxide. Background technique [0002] Carbon dioxide is the main greenhouse gas, and its emission leads to global temperature rise. The resulting environmental problems are related to the survival and development of human beings, and are one of the most severe challenges facing human society. Research shows that by the end of the 21st century CO 2 Emissions will increase the global temperature by 6°C, far exceeding the "safety line" of 2°C. If no measures are taken, it will bring disastrous consequences. Combustion of fossil fuels results in massive CO emissions 2 , resulting in accelerated global warming in recent years. However, due to the low price of coal and the mature development of combustion technology, it has caused human dependence o...

AI Technical Summary

Problems solved by technology

Amine absorbents have fast absorption speed, strong absorption capacity, and low cost, but organic amine absorbents are easily degraded by impurities such as organic, inorganic, and solid particles, resulting in solvent loss

In addition, this method needs to consume a large amount of energy in the recycling process of the amine solution, and the corrosion of the equipment is relatively serious.

Ionic liquids have promising material numbers as an alternative to organic amine solutions, but their high viscosity leads to slow mass transfer, CO 2 The adsorption rate is low, and the adsorption amount calculated per gram of adsorbent is much lower than that of organic amine solution, which cannot meet the requirements of use