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J Colloid Interface Sci. 2008 Feb 1;318(1):50-8. Epub 2007 Oct 22.

Synthesis and characterization of silicalite-1/carbon-graphite membranes.

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Chemical Engineering and Applied Chemistry, SEAS, Aston University, Birmingham B4 7ET, UK.


Silicalite-1/carbon-graphite composite membranes have been prepared using a standard hydrothermal synthesis method and characterized by XRD, SEM, TGA, BET and permeation experiments. Single gas permeation fluxes and binary mixtures separation and selectivity data are reported for methane, ethane and propane using the composite membranes. Carbon-graphite oxidized for 4 h prior to membrane preparation had the most promising separation properties. The permeation fluxes for the binary mixtures reflect that of the single component flux ratios. At 20 degrees C the membranes show high separation selectivity toward lighter component in binary mixtures. Single gas permeances for methane and ethane were found to decrease with increasing temperatures while that of propane fluctuates.


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