CO2 adsorption and desorption performance of waste ion‐exchange resin‐based activated carbon

• Published in: Environmental progress & sustainable energy Vol. 37; no. 2; pp. 703 - 711
• Main Authors: Wei, Mengqi, Yu, Qingbo, Duan, Wenjun, Zuo, Zongliang, Hou, Limin, Dai, Jinjie
• Format: Journal Article
• Language: English
• Published: 01.03.2018
• Subjects: activated carbon; adsorption; carbon dioxide; desorption; waste ion‐exchange resin
• ISSN: 1944-7442; 1944-7450
• DOI: 10.1002/ep.12743

Activated carbons were produced using waste ion‐exchange resin, and the effects of different activation temperatures were researched in this article. The experimental results indicate that the activated carbons are microporous carbons. The BET specific surface area and total volume increase at first and then decrease as the activation temperature increases. The maximum adsorption capacity is 81.24 mg/g at 30°C. A higher adsorption temperature and lower CO2 partial pressure resulted in a lower CO2 adsorption capacity. After 20 adsorption–desorption cycles, the CO2 adsorption capacity decreases slightly, and the regeneration degree is always at a high level, which indicates that the activated carbons can be used for a long time. The results in this work suggest that waste ion‐exchange resin‐based activated carbons show great potential as adsorbents for postcombustion CO2 capture. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 703–711, 2018