Abstract
In this study, gas permeability and selectivity of Vycor glass and alumina membrane were compared by using H2, CO2, CO, CH4 and N2 gases at the temperatures of 323-823 K before and afterapplying the silica coating process. H2 permeability decreased with increasing the temperature before silica coating both in Vycor glass and alumina membrane. However, H2 permeability increased with increasing the temperature, that was an indication of activated transport after silica coating both in Vycor glass and alumina membrane. Lower permeability values and higher selectivities were obtained in Vycor glass membrane than alumina membrane having higher permeability and lower selectivities.
Highlights
Membrane separation of gaseous mixtures has come to attract much attention from the viewpoint of energy-conservative recovery of gases, especially at high temperature, where most of ordinary organic membranes can not be applied because of their thermal instability
Gas permeability and selectivity of Vycor glass and alumina membrane were compared by using H2, CO2, CO, CH4 and N2 gases at the temperatures of 323-823 K before and afterapplying the silica coating process
H2 permeability decreased with increasing the temperature before silica coating both in Vycor glass and alumina membrane
Summary
Membrane separation of gaseous mixtures has come to attract much attention from the viewpoint of energy-conservative recovery of gases, especially at high temperature, where most of ordinary organic membranes can not be applied because of their thermal instability. Gas permeability and selectivity of Vycor glass and alumina membrane were compared by using H2, CO2, CO, CH4 and N2 gases at the temperatures of 323-823 K before and afterapplying the silica coating process.
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