Premium
Amorphous silica molecular sieving membranes by sol‐gel processing
Author(s) -
Cao Guozhong,
Lu Yunfeng,
Delattre Laurent,
Brinker C. Jeffrey,
López Gabriel P.
Publication year - 1996
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.19960080713
Subject(s) - materials science , membrane , microporous material , amorphous solid , knudsen diffusion , chemical engineering , ceramic , gas separation , zeolite , diffusion , amorphous silica , sol gel , porosity , nanotechnology , organic chemistry , composite material , catalysis , thermodynamics , chemistry , biochemistry , physics , engineering
Microporous ceramics and ceramic membranes have many potential applications, for example, in the chemical, environmental, energy conversion, and automotive industries. An organic template approach using sol‐gel processing is described by which microporous amorphous silica is synthesized. It is shown that the very narrow pore size distribution is comparable to that of the zeolite ZSM‐5 and that the membranes have ideal gas separation factors at least two orders of magnitude larger than those expected for a Knudsen diffusion separation mechanism.