Dynamic desorption of adsorbing species under cross membrane pressure difference: a new defect characterisation approach in zeolite membranes

Alumina–zeolite composite membranes were prepared on alumina porous tubular supports by single-step in situ hydrothermal synthesis. Hydrogen/ n-butane separation factor was used as a criterion to evaluate the presence of defects. Five membranes of different qualities were selected. The hydrogen perm...

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Bibliographic Details
Published in:Journal of membrane science 2003-12, Vol.226 (1), p.101-110
Main Authors: Pachtová, Olga, Kumakiri, Izumi, Kočiřik, Milan, Miachon, Sylvain, Dalmon, Jean-Alain
Format: Article
Language:English
Subjects:
Catalysis
Chemical Sciences
Desorption
Membrane defect
n-Butane
Water
Zeolite membrane
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Summary:Alumina–zeolite composite membranes were prepared on alumina porous tubular supports by single-step in situ hydrothermal synthesis. Hydrogen/ n-butane separation factor was used as a criterion to evaluate the presence of defects. Five membranes of different qualities were selected. The hydrogen permeance through the membranes, plugged beforehand with two strongly adsorbing gases (water and n-butane), was followed with time at room temperature. The dynamic desorption thus observed was correlated to the quality of the membrane.
ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2003.07.017