Molecular sieve silica membranes for H2/CO separation

Duke, M. C., Diniz da Costa, J. C., Gray, P. G. and Lu, G. Q. (2001). Molecular sieve silica membranes for H2/CO separation. In: D. G. Wood, 6th World Congress of Chemical Engineering: Proceedings. 6th World Congress of Chemical Engineering, Melbourne, Australia, (1-6). 23-28 September 2001.

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Author Duke, M. C.
Diniz da Costa, J. C.
Gray, P. G.
Lu, G. Q.
Title of paper Molecular sieve silica membranes for H2/CO separation
Conference name 6th World Congress of Chemical Engineering
Conference location Melbourne, Australia
Conference dates 23-28 September 2001
Proceedings title 6th World Congress of Chemical Engineering: Proceedings
Place of Publication Melbourne, Australia
Publisher I. E. Aust
Publication Year 2001
Sub-type Fully published paper
Editor D. G. Wood
Volume CD-ROM
Start page 1
End page 6
Total pages 6
Language eng
Abstract/Summary Efficient separation of fuel gas (H2) from other gases in reformed gas mixtures is becoming increasingly important in the development of alternative energy systems. A highly efficient and new technology available for these separations is molecular sieve silica (MSS) membranes derived from tetraethyl-orthosilicate (TEOS). A permeation model is developed from an analogous electronic system and compared to transport theory to determine permeation, selectivity and apparent activation of energy based on experimental values. Experimental results for high quality membranes show single gas permselectivity peaking at 57 for H2/CO at 150°C with a H2 permeation of 5.14 x 10^-8 mol.m^-2.s^-1.Pa^-1. Higher permeance was also achieved, but at the expense of selectivity. This is the case for low quality membranes with peak H2 permeation at 1.78 x 10-7 mol.m-2.s-1.Pa-1 at 22°C and H2/CO permselectivity of 4.5. High quality membranes are characterised with positive apparent activation energy while the low quality membranes have negative values. The model had a good fit of r-squared of 0.99-1.00 using the experimental data.
Subjects 290603 Membrane and Separation Technologies
1007 Nanotechnology
0302 Inorganic Chemistry
670707 Inorganic industrial chemicals
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Created: Fri, 02 Feb 2007, 09:42:52 EST by Belinda Weaver on behalf of School of Engineering