Abstract
Catalytic carbon dioxide(CO2)desorption has emerged as a promising approach to enhance the effi-ciency of CO2 capture while minimizing energy demands,crucial for advancing chemical absorption methods.This study investigates the catalytic potential of three metal phosphates(aluminium phosphate(AlPO4),cobaltous phosphate(Co3(PO4)2),and zinc phosphate(Zn3(PO4)2))in improving the MEA(monoethanolamine)-based CO2 absorption-desorption performance.Among the catalysts tested,AlPO4 demonstrated superior performance,enhancing CO2 absorption capacity by 4.2％to 9.3％and desorption capacity by 12.3％to 22.7％across five cycles.Notably,AlPO4 increased the CO2 desorption rate by over 104.4％at a desorption temperature of 81.3 ℃,simultaneously reducing the required sensible heat by 12.3％to 22.7％,compared to processes without catalysts.The improved efficiency is attributed to AlPO4's ability to effectively transfer hydrogen protons from protonated MEA to carbamate,thereby facilitating the decomposition of carbamate and regenerating CO2.This research introduces a viable,cost-effective,and eco-friendly solid acid catalyst strategy for CO2 desorption,contributing to the development of more energy-efficient CO2 capture technologies.
维普
万方数据