Catalytic carbon dioxide(CO_(2))desorption has emerged as a promising approach to enhance the efficiency of CO_(2)capture while minimizing energy demands,crucial for advancing chemical absorption methods.This study in...Catalytic carbon dioxide(CO_(2))desorption has emerged as a promising approach to enhance the efficiency of CO_(2)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(Co_(3)(PO_(4))_(2)),and zinc phosphate(Zn_(3)(PO_(4))_(2)))in improving the MEA(monoethanolamine)-based CO_(2)absorption-desorption performance.Among the catalysts tested,AlPO_(4)demonstrated superior performance,enhancing CO_(2)absorption capacity by 4.2%to 9.3%and desorption capacity by 12.3%to 22.7%across five cycles.Notably,AlPO_(4)increased the CO_(2)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 AlPO_(4)'s ability to effectively transfer hydrogen protons from protonated MEA to carbamate,thereby facilitating the decomposition of carbamate and regenerating CO_(2).This research introduces a viable,cost-effective,and eco-friendly solid acid catalyst strategy for CO_(2)desorption,contributing to the development of more energy-efficient CO_(2)capture technologies.展开更多
基金supports from the China Postdoctoral Science Foundation(2023M743768)National Natural Science Foundation of China(52006112)Xuzhou Bureau of Science and Technology(KC23293).
文摘Catalytic carbon dioxide(CO_(2))desorption has emerged as a promising approach to enhance the efficiency of CO_(2)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(Co_(3)(PO_(4))_(2)),and zinc phosphate(Zn_(3)(PO_(4))_(2)))in improving the MEA(monoethanolamine)-based CO_(2)absorption-desorption performance.Among the catalysts tested,AlPO_(4)demonstrated superior performance,enhancing CO_(2)absorption capacity by 4.2%to 9.3%and desorption capacity by 12.3%to 22.7%across five cycles.Notably,AlPO_(4)increased the CO_(2)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 AlPO_(4)'s ability to effectively transfer hydrogen protons from protonated MEA to carbamate,thereby facilitating the decomposition of carbamate and regenerating CO_(2).This research introduces a viable,cost-effective,and eco-friendly solid acid catalyst strategy for CO_(2)desorption,contributing to the development of more energy-efficient CO_(2)capture technologies.
