High performance valuation of CO2 gas separation ceramic membrane system.

Atmospheric carbon dioxide emissions are considered as the greatest environmental challenge the world is facing today. The tasks to control the emissions include the recovery of CO2 from flue gas. This concern has been improved due to recent advances in materials process engineering resulting in the development of inorganic gas separation membranes with excellent thermal and mechanical stability required for most gas separations. This paper therefore evaluates the performance of a highly selective inorganic membrane for CO2 recovery applications. Analysis of results obtained is in agreement with experimental literature data. Further results show the prediction performance of the membranes for gas separation and the future direction of research. The materials selection and the membrane preparation techniques are discussed. Method of improving the interface defects in the membrane and its effect on the separation performance has also been reviewed and in addition advances to totally exploit the potential usage of this innovative membrane

Structural characteristic and permeation of gases through a supported silica inorganic ceramic membrane.

The present paper describes the synthesis and hydrodynamic properties of a surface-modified ceramic membrane composed of a porous support which consists of gamma alumina and a titania wash-coat. Single gas permeation through the membranes was measured at 298 and 373K using H2, N2, Ar and CH4. The membranes showed high separation factors of gases consistent with Knudsen diffusion mechanisms. Structural characteristic and pore size distribution of the porous and surface modified silica membrane was analysed with Liquid Nitrogen adsorption at 77K to obtain gas adsorption/desorption isotherm of membrane materials. Both surface area of the porous support and surface-modified silica membrane was determined using Brunauer-Emmett-Teller(BET) model to reproducible isotherms while the pore diameter of both membranes was determined using Barrette- Joyner-Halenda (BJH) curve. The adsorption/desorption curve for the surface-modified silica ceramic membrane showed a type IV/V isotherm which indicates a mesoporous makeup. This surface-modified membrane, therefore, displayed high thermal stability and high permeance. Further results obtained from the experiments conducted have helped explain the effect of dissimilarity in the mass-transfer on the gas permeation through the hybrid ceramic membranes

Unconventional composite inorganic membrane fabrication for carbon emissions mitigation.

An unconventional composite inorganic ceramic membrane capable of enhancing carbon dioxide emission decline was fabricated and tested at laboratory scale in conformism to various environmental guidelines and also to mitigate the effect of global warming. A review of the existing membrane technologies for carbon capture including the relevant gas transport mechanisms is presented. Single gas permeation experiments using silica modified ceramic membrane with internal diameter 20mm, outside diameter 25mm and length of 368mm deposited on a macro porous support was carried out to investigate individual gas permeation behaviours at different pressures at room temperature. Membrane fabrication was achieved using after a dip coating method. Nitrogen, Carbon dioxide, Argon, Oxygen and Methane pure gases were used to investigate their individual permeation rates at various pressures. Results show that the gas flow rate increases with pressure drop. However above a pressure of 3bar, CO2 permeability ratio to that of the other gases indicated control of more selective adorptive transport mechanism