Abstract
AbstractZIF‐8 membranes have emerged as the most promising candidate for propylene/propane (C3H6/C3H8) separation through its precise molecular sieving characteristics. The poor reproducibility and durability, and high cost, thus far hinder the scalable synthesis and industrial application of ZIF‐8 membranes. Herein, we report a semi‐solid process featuring ultrafast and high‐yield synthesis, and outstanding scalability for reproducible fabrication of ZIF‐8 membranes. The membranes show excellent C3H6/C3H8 separation performance in a wide temperature and pressure range, and remarkable stability over 6 months. The ZIF‐8 membrane features dimethylacetamide entrapped ZIF‐8 crystals retaining the same diffusion characteristics but offering enhanced adsorptive selectivity for C3H6/C3H8. The ZIF‐8 membrane was prepared on a commercial flat‐sheet ceramic substrate. A prototypical plate‐and‐frame membrane module with an effective membrane area of about 300 cm2 was used for efficient C3H6/C3H8 separation.
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