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Hydrogen separation using silica-based composite membranes.

Kajama, Mohammed Nasir; Nwogu, Ngozi Claribelle; Gobina, Edward


Mohammed Nasir Kajama

Ngozi Claribelle Nwogu

Edward Gobina


Silica sol-gel membranes have been developed for moderate temperature (300 {deg}C) separation of hydrogen (H2) from nitrogen (N2), methane (CH4) and argon (Ar) gas molecules. Tubular ceramic support with 15 nm nominal pore diameter and 45% porosity was modified by dip-coating method. Gas permeation characteristics were evaluated. Defect free silica layer over the substrate for hydrogen gas separation was obtained. Hydrogen gas permeate flux of 4.82x10-1 mol/sec m2 at 1.0 barg feed pressure was obtained. Selectivities of H2 over N2, CH4 and Ar of 3.07, 2.23 and 3.75 at 300 {deg}C, 200 {deg}C and 300 {deg}C and 0.9 barg were obtained with the silica membranes. The gas permeation and the selectivity performance of the membrane were evaluated.

Journal Article Type Conference Paper
Start Date Sep 21, 2014
Publication Date Oct 1, 2014
Journal Advanced materials research
Print ISSN 1022-6680
Electronic ISSN 1662-8985
Publisher Trans Tech Publications
Peer Reviewed Peer Reviewed
Volume 1051
Pages 107-111
Institution Citation KAJAMA, M.N., NWOGU, N.C. and GOBINA, E. 2014. Hydrogen separation using silica-based composite membranes. Advanced materials research [online], 1051: selected papers from the 2014 international conference on green materials and environmental engineering (GMEE 2014), 21-22 September 2014, Hong Kong, China, pages 107-111. Available from:
Keywords Dip coating; Gas permeation; Hydrogen separation; Silica membrane