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Preparation and characterization of inorganic membranes for hydrogen separation.

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

Authors

Mohammed Nasir Kajama

Ngozi Claribelle Nwogu

Edward Gobina



Abstract

A tubular commercially available alumina support was coated using the dip coating technique. The objective is to prepare silica and Pt impregnated membranes. Scanning electron microscopy (SEM), energy diffraction X-ray analysis (EDXA), nitrogen adsorption-desorption at 77{A0}K and gas permeation measurements were employed for membrane characterization. The permeation of H2, He and N2 revealed that the membranes are crack-free. H2/N2 selectivity for the silica membrane obtained the highest value of 2.93 at 0.9 barg and 25{A0}{deg}C. On the other hand, H2/He selectivity of 1.96 at 1.6 barg and 300{A0}{deg}C for the Pt membrane was obtained and found to be higher than the theoretical Knudsen selectivity. While the silica membrane realised on the thin film coating to enhance the selectivity to hydrogen, the Pt impregnated membrane on the other hand enhance hydrogen transport through an activated surface diffusion in addition to Knudsen flow.

Citation

KAJAMA, M.N. NWOGU, N.C. and GOBINA, E. 2016. Preparation and characterization of inorganic membranes for hydrogen separation. International journal of hydrogen energy [online], 41(19): specail issue on progress in hydrogen production and applications: proceedings of 6th International conference on hydrogen production 2015 (ICH2P 2015), 3-6 May 2015, Ontario, Canada, pages 8221-8227. Available from: https://doi.org/10.1016/j.ijhydene.2015.11.179

Journal Article Type Conference Paper
Conference Name 6th International conference on hydrogen production 2015 (ICH2P 2015)
Conference Location Ontario, Canada
Acceptance Date Nov 17, 2015
Online Publication Date Feb 6, 2016
Publication Date May 25, 2016
Deposit Date Sep 8, 2016
Publicly Available Date Feb 7, 2017
Journal International journal of hydrogen energy
Print ISSN 0360-3199
Electronic ISSN 1879-3487
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 41
Article Number 19
Pages 8221-8227
DOI https://doi.org/10.1016/j.ijhydene.2015.11.179
Keywords Tubular alumina support; Silica membrane; Pt membrane; Hydrogen selectivity
Public URL http://hdl.handle.net/10059/1625

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