Accelerated CO2 transport by synergy effect of ionic liquid and Zn particles

In this experiment, an ionic liquid (BMIMBF4) was used to prepare a composite membrane containing ZnO nanoparticles. Our previous study indicated that a composite membrane composed of ZnO and the ionic liquid (BMIMBF4) showed high CO2/N-2 separation performance with a GPU of 101 and a selectivity of 42.1. The oxide layer of ZnO nanoparticles with the imidazolium ring of ionic liquid (BMIMBF4) increased the solubility of CO2 and acted as a barrier for N-2, leading to an overall improvement in the performance. However, the liquid film was absorbed into support over time and became thickened, leading to instability. In order to solve this problem, a solid polymer composite film was manufactured and investigated as a solution. The polymer PEBAX2533 was used as a polymer matrix to produce a composite membrane capable of showing both high separation performance and long-term stability. (C) 2021 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.