HIGH-PRESSURE GAS-PERMEABILITY OF MICROPOROUS CARBON MEMBRANES

Microporous carbon membranes are prepared, characterised structurally and tested in terms of high pressure CO2 permeability at temperatures around the critical. A maximum in the permeance versus relative pressu re curve is observed in close analogy to the case of mesoporous membra nes. This weakens considerably as the temperature is increased above t he critical. The results offer significant input for an improved under standing and theoretical modelling of the process and may be potential ly useful for the identification of the optimal pressure and temperatu re conditions for efficient gas separations.