CO2 Adsorption and Desorption by Waste Ion-Exchange Resin–Based Activated Carbon on Fixed Bed

• Published in: Frontiers in energy research Vol. 9
• Main Authors: Wei, Mengqi, Zhao, Qiuyue
• Format: Journal Article
• Language: English
• Published: Frontiers Media S.A 02.11.2021
• Subjects: breakthrough curve; CO2 adsorption; desorption; fixed bed; waste ion-exchange resin–based activated carbon
• ISSN: 2296-598X; 2296-598X
• DOI: 10.3389/fenrg.2021.772710

The waste ion-exchange resin–based activated carbon (WIRAC) was utilized for CO 2 adsorption. The effect of adsorption temperature, gas flow, CO 2 concentration, and adsorbent filling content on CO 2 adsorption properties of WIRAC and the effect of desorption temperature and sweep gas flow on CO 2 desorption performances of WIRAC were researched. In the adsorption process, with the increase of adsorption temperature, the CO 2 adsorption capacity and adsorption rate decrease; as the gas flow increases, the CO 2 adsorption capacity decreases, but the adsorption rate increases; with the increase of CO 2 concentration and adsorbent filling content, the CO 2 adsorption capacity and adsorption rate both increase. In the desorption process, the higher the desorption temperature and the smaller the sweep gas flow, the higher the CO 2 purity of product gas and the longer the desorption time. In order to make sure the adsorbent be used efficiently and the higher CO 2 concentration of product gas, the adsorption and desorption conditions selected should be a suitable choice.