Coupling atomic layer deposition with supercritical fluid processing to provide a highly C3H6 ‐selective ZIF‐8 membrane

In this study, a solvent-free protocol was developed for sustainable production of ZIF-8 membranes with exceptional C3H6/C3H8 selectivity through combining atomic layer deposition (ALD) technique with in situ supercritical fluid (SCF) processing. Experimental results indicated that maintaining appropriate deposition number and conducting SCF processing in gas-like supercritical carbon dioxide region were crucial for obtaining ZIF-8 membranes with excellent C3H6/C3H8 selectivity (~185), one of the highest among ZIF-8 membranes reported in the literature. Noteworthy, not only residual 2-methylimidazole ligands along with vented gaseous CO2 could be fully recycled and repetitively utilized, but also obsoleting ZIF-8 membranes could be effectively patched upon SCF-based treatment. The above-mentioned solvent-free protocol holds great application prospects for sustainable production of diverse high-performance metal –organic framework membranes.

Source: AIChE Journal - February 12, 2024 Category: Science Authors: Liangliang Liu, Wenjing Hu, Yanwei Sun, Taotao Ji, Yongfu He, Kunpeng Yu, Mingming Wu, Gaohong He, Yi Liu Tags: RESEARCH ARTICLE Source Type: research