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Gas permeation through zeolite‐alumina composite membranes
Author(s) -
Nishiyama Norikazu,
Ueyama Korekazu,
Matsukata Masahiko
Publication year - 1997
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690431318
Subject(s) - permeance , permeation , microporous material , zeolite , membrane , diffusion , ferrierite , chemical engineering , adsorption , mordenite , chemistry , gas separation , molecule , materials science , molecular sieve , thermodynamics , organic chemistry , biochemistry , engineering , catalysis , physics
Mordenite (MOR) and ferrierite (FER) membranes without any pinhole and crack were synthesized by a vapor‐phase transport method. The permeance of H 2 , He, CH 4 , N 2 , O 2 and CO 2 was determined at 290–400 K, which showed minimum with increasing temperatures for most cases. In the parallel diffusion model was proposed, molecules adsorbed in a micropore are assumed to diffuse in parallel through the central region of the pore and along the wall region of the pore. This parallel diffusion model accounts for the effect of pore size of MOR and FER on the permeation and expresses the experimental data well. The interaction between gas molecules and pore walls are evaluated for each gas.