Development of high performance solid CO2 absorbing materials
Yoichi Murakami Laboratory
Background and Objectives
Low energy consumption and low cost CO2 capture technology is essential for climate change min and GX realization. The current chemical absorption method using amine solution is difficult to achieve the government target of 2,000 yen/CO2/t by 2030 due to the high cost caused by the sensible and latent heat of water as a solvent and the high reaction heat. In addition, the corrosiveness and environmental impact of amine solution are problematic. This study aims to create a new generation of solid CO2 absorbing materials that solve the problems of current technologies.
Research
Reduction of heat of adsorption is essential for low energy consumption. However, in general, lowering the heat of adsorption sacrifices "rate and CO2 selectivity. This study shows that this dilemma can be avoided by creating a "covalent organic skeleton (= crystalline porous material consisting only of light elements)" with a high density of CO2 adsorption sites as a solid absorber (see figure below).
New COF with low heat of adsorption, high CO2 selectivity ratio, and high heat resistance developed
Hostile effects on GX technology development
It is expected to be a new-generation CO2 min recovery technology that can achieve 2000 yen/CO2 x t, solving the problems (high energy consumption, corrosiveness, and environmental impact) of the current method using amine solution.