Heteropolyacid modified Cerium-based MOFs catalyst for amine solution regeneration in CO2 capture

Abstract

The CO2 desorption process consuming excessive energy in traditional CCUS technology becomes a great challenge to achieve the goal of carbon neutrality. The multi-acid site on solid acid catalyst promote regeneration reaction proceeds. In order to solve the property defects of a single type of catalyst, we introduced heteropolyacids into cerium-based MOFs materials to increase acid sites. The composite catalyst named CeO2-MOF-HPW (CeM-HPW) shows good catalytic performance. The CO2 desorption capacity and rate were increased by 38.1% and 166%, respectively, and the desorption energy consumption was reduced by 29.4% in comparison with the uncatalytic process. CeO2 and HPW synergistically promote the decomposition of carbamate. Heteropolyacid anions help the deprotonation process for proton transfer. The catalytic approach reduces the energy barrier of the desorption reaction so as to obtain a desorption effect with high efficiency and low energy consumption. This catalyst provides a new idea for low energy consumption CCUS technology.