Investigation and application of gas transport mechanisms for alumina support and silica membranes

In the present study, the gas transport mechanisms were first studied and then experimental permeation data were fitted on available models. Finally, the appropriate models which showed the best conformity with experimental data, were selected. The H2, CH4 and CO2 permeances through silica membrane was very smaller than those of alumina support. Good conformity was found between viscous flow model and experimental data of gas permeances through alumina support. The H2, CH4 and CO2 permeances through silica membrane showed good conformity with configurational diffusion model. Transport model parameters were derived for alumina support, non-templated and templated silica membranes.