WIT Press


Hydrogen Permeation Using Nanostructured Silica Membranes

Price

Free (open access)

Paper DOI

10.2495/SDP150381

Volume

193

Pages

10

Page Range

447 - 456

Published

2015

Size

607 kb

Author(s)

M. N. Kajama, N. C. Nwogu, E. Gobina

Abstract

This study examines hydrogen (H2) transport and separation factors for various gases on mesoporous membrane for unmodified and dip-coated silica membrane. Single gas permeation of H2, N2, CH4, Ar and CO2 were determined at permeation temperature of 298–373 K and feed gauge pressure of 0.1 to 0.9 barg. H2 permaetion rose from 3.3 to about 6.4 l/min at 0.9 bar. H2 selectivity over N2, CH4, Ar and CO2 for the dip-coated silica membrane at 298 K and 0.9 bar was 2.93, 2.18, 3.51 and 3.61 respectively. Observation of the permeation of these membranes revealed that the transport of gases is governed by a combination of activated transport and knudsen flow.

Keywords

mesoporous membranes, dip-coating, gas permeation, hydrogen selectivity, permeation temperature