Kinetic analysis of an anion exchange absorbent for CO(2) capture from ambient air

This study reports a preparation method of a new moisture swing sorbent for CO(2) capture from air. The new sorbent components include ion exchange resin (IER) and polyvinyl chloride (PVC) as a binder. The IER can absorb CO(2) when surrounding is dry and release CO(2) 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 CO(2) absorbent. It has been proved that the kinetic performance of CO(2) 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 H(2)O molecules in the sample. The impressive is this new CO(2) absorbent has the fastest CO(2) absorption rate among all absorbents which have been reported by other up-to-date literatures.