Kinetic analysis of an anion exchange absorbent for CO2 capture from ambient air

Xiaoyang Shi; Qibin Li; Tao Wang; Klaus S Lackner

doi:10.1371/journal.pone.0179828

Kinetic analysis of an anion exchange absorbent for CO2 capture from ambient air

PLoS One. 2017 Jun 22;12(6):e0179828. doi: 10.1371/journal.pone.0179828. eCollection 2017.

Authors

Xiaoyang Shi¹, Qibin Li², Tao Wang³, Klaus S Lackner⁴

Affiliations

¹ Department of Earth and Environmental Engineering, Columbia University, New York, NY, United States of America.
² College of Aerospace Engineering, Chongqing University, Chongqing, China.
³ State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, Zhejiang, China.
⁴ School of Sustainable Engineering & Built Environment, Arizona State University, Tempe, AZ, United States of America.

Abstract

This study reports a preparation method of a new moisture swing sorbent for CO2 capture from air. The new sorbent components include ion exchange resin (IER) and polyvinyl chloride (PVC) as a binder. The IER can absorb CO2 when surrounding is dry and release CO2 when surrounding is wet. The manuscript presents the studies of membrane structure, kinetic model of absorption process, performance of desorption process and the diffusivity of water molecules in the CO2 absorbent. It has been proved that the kinetic performance of CO2 absorption/desorption can be improved by using thin binder and hot water treatment. The fast kinetics of P-100-90C absorbent is due to the thin PVC binder, and high diffusion rate of H2O molecules in the sample. The impressive is this new CO2 absorbent has the fastest CO2 absorption rate among all absorbents which have been reported by other up-to-date literatures.

MeSH terms

Absorption, Physicochemical*
Air / analysis*
Carbon Dioxide / chemistry*
Carbon Dioxide / isolation & purification*
Ion Exchange
Kinetics

Substances

Carbon Dioxide

Grants and funding

This work was partly supported by the National Natural Science Foundation of China (No. 51676169), and partly supported by a grant from the Office of Naval Research (ONR BAA 14-001). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.