Hydrogen Permeation Using Nanostructured Silica Membranes
Free (open access)
447 - 456
M. N. Kajama, N. C. Nwogu, E. Gobina
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.
mesoporous membranes, dip-coating, gas permeation, hydrogen selectivity, permeation temperature