Abstract
The similar physico-chemical properties of propylene and propane molecules have made the separation process of propylene/propane challenging. Membrane separation techniques show substantial prospects in propylene/propane separation due to their low energy consumption and investment costs, and they have been proposed to replace or to be combined with the conventional cryogenic distillation process. Over the past decade, organosilica membranes have attracted considerable attention due to their significant features, such as their good molecular sieving properties and high hydrothermal stability. In the present review, holistic insight is provided to summarize the recent progress in propylene/propane separation using polymeric, inorganic, and hybrid membranes, and a particular inspection of organosilica membranes is conducted. The importance of the pore subnano-environment of organosilica membranes is highlighted, and future directions and perspectives for propylene/propane separation are also provided.
Highlights
The similar physico-chemical properties of propylene and propane molecules have made the separation process of propylene/propane challenging
In comparison to polymeric membranes, inorganic membranes composed of molecular sieves, such as carbon molecular sieve (CMS), zeolites, and zeolite imidazolate frameworks (ZIFs), are important candidates for C3H6/C3H8 separation because of their high separation performances and excellent chemical and thermal stabilities
ZIF-8 membrane fabricated by a hydrothermal seeded growth method showed fect-free ZIF-8 membrane fabricated by a hydrothermal seeded growth method showed superior performance for C3H6 and C3H8 mixtures
Summary
1b [13,41]. Polymeric membranes are ever, most of reviews focused only on the the polymeric membranes memdominated bythese a solution-diffusion model, where adsorbed
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