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