Shi Xiaoyang, Li Qibin, Wang Tao, Lackner Klaus S
Department of Earth and Environmental Engineering, Columbia University, New York, NY, United States of America.
College of Aerospace Engineering, Chongqing University, Chongqing, China.
PLoS One. 2017 Jun 22;12(6):e0179828. doi: 10.1371/journal.pone.0179828. eCollection 2017.
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.
本研究报道了一种用于从空气中捕获二氧化碳的新型湿度摆动吸附剂的制备方法。新型吸附剂成分包括离子交换树脂（IER）和作为粘合剂的聚氯乙烯（PVC）。IER在周围环境干燥时能吸收二氧化碳，在周围环境潮湿时释放二氧化碳。该论文介绍了膜结构、吸收过程的动力学模型、解吸过程的性能以及水分子在二氧化碳吸收剂中的扩散率的研究。已证明通过使用薄粘合剂和热水处理可以提高二氧化碳吸收/解吸的动力学性能。P-100-90C吸收剂的快速动力学归因于薄的PVC粘合剂以及样品中H2O分子的高扩散速率。令人印象深刻的是，这种新型二氧化碳吸收剂在其他最新文献报道的所有吸收剂中具有最快的二氧化碳吸收速率。
