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Zeolite Membranes – The Importance of Support Analysis
Author(s) -
Kapteijn Freek,
Wang Xuerui
Publication year - 2022
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.202100136
Subject(s) - zeolite , membrane , selectivity , chemical engineering , adsorption , materials science , diffusion , porosity , flux (metallurgy) , chemistry , composite material , organic chemistry , catalysis , engineering , thermodynamics , biochemistry , physics , metallurgy
Zeolite membranes are highly attractive in energy efficient, selective separation technologies. Their high selectivity originates from selective adsorption, diffusion and even molecular sieving. High flux zeolite membranes (> 1 mol s −1 m −2 ) with a sub‐micrometer thickness are mechanically stabilized by a porous, often multilayer, support. Transport mechanisms in zeolite layer and support, however, are counteracting regarding selectivity, and a support may also act as a flux resistance. Several examples are analyzed quantifying the impact of the support on the observed performance, showing the effect of layer thickness, orientation of the asymmetric membrane and operational conditions, resulting in recommendations for the configuration of zeolite membrane modules.