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Methanol—hydrogen separation by capillary condensation in inorganic membranes |
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| Authors: | David P. Sperry John L. Falconer Richard D. Noble |
| Affiliation: | Department of Chemical Engineering, University of Colorado, Boulder, CO 80309-0424 USA |
| Abstract: | A NaOH-poisoned γ-alumina membrane with 4-nm diameter pores was used to separate CH3OH from a H2/CH3OH mixture. Between 373 and 473 K, CH3OH condensed in the pores for certain pressure ranges, and was preferentially removed through the pores. Separation factors as high as 600 for CH3OH over H2 were obtained. Capillary condensation was observed at CH3OH pressures (0.60 ± 0.05 Psat) much lower than those predicted by the Kelvin equation. Causes for the deviations are indicated. |
| Keywords: | ceramic membranes diffusion gas and vapor permeation gas separation inorganic membranes separation of hydrogen/methanol alumina membrane |
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