Transport mechanism in weakly branched silica films

Diniz Da Costa, J. C., Rudolph, V. and Lu, M. G. (2000). Transport mechanism in weakly branched silica films. In: D. Do Duong, Adsorption Science and Technology. Proceedings of the Second Pacific Basin Conference on Adsorption Science and Technology. 2nd Pacific Basin Conference on Adsorption Science and Technology, Brisbane, Australia, (381-385). 14-18 May 2000.


Author Diniz Da Costa, J. C.
Rudolph, V.
Lu, M. G.
Title of paper Transport mechanism in weakly branched silica films
Conference name 2nd Pacific Basin Conference on Adsorption Science and Technology
Conference location Brisbane, Australia
Conference dates 14-18 May 2000
Proceedings title Adsorption Science and Technology. Proceedings of the Second Pacific Basin Conference on Adsorption Science and Technology   Check publisher's open access policy
Journal name Adsorption Science and Technology   Check publisher's open access policy
Place of Publication Singapore; River Edge, N.J., U.S.A.
Publisher World Scientific Publishing
Publication Year 2000
Sub-type Fully published paper
ISBN 9789810242633
9810242638
ISSN 0263-6174
Editor D. Do Duong
Start page 381
End page 385
Total pages 5
Language eng
Abstract/Summary Activated transport is one of the most important properties of microporous membranes which results in molecular sieving separation with very high selectivities. The flux J (mol.m(-2).s(-1)) through microporous membranes as a function of temperature can be derived from the isosteric heat of adsorption Q (st) and the mobility energy E-m (kJ.mol(-1)). In this work, high quality molecular sieving membranes have been successfully synthesised using sol-gel process to prepare weakly branched silica films. Maximum permselectivities calculated are 846 (He/CH4), 130 (CO2/CH4) and 58 (H-2/CO2). The effect of mobility energy on silica films is demonstrated by preparation methods such as single-step and two-step catalysed hydrolysis of tetraethoxysilane (TEOS) which leads to the production of weakly branched silica films.
Subjects 290603 Membrane and Separation Technologies
660199 Energy transformation not elsewhere classified
E1
Q-Index Code E1

Document type: Conference Paper
Collection: School of Chemical Engineering Publications
 
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Created: Tue, 10 Jun 2008, 12:42:18 EST