Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
638839 | Journal of Membrane Science | 2006 | 7 Pages |
Abstract
Porous titanium oxide membranes with pore sizes in the range of 2.5-22Â nm were prepared by a sol-gel procedure, and were applied for decomposition of methanol and ethanol as model volatile organic compounds (VOCs) in a photocatalytic membrane reactor, where oxidation reaction occurs both on the surface and inside the porous TiO2 membrane while reactants are permeating via one-pass flow. Methanol was completely photo-oxidized by black-light irradiation to CO2 when methanol at a concentration of 100Â ppm was used at a feed flow rate of 500Â ÃÂ 10â6Â m3/min, but the conversion decreased when the MeOH concentration in the feed was increased. Pt-modification was carried out by photo-deposition, and led to a decrease in pore diameter. Using Pt-modified membranes, a nearly complete oxidation of methanol up to 10,000Â ppm at a feed flow rate of 500Â ÃÂ 10â6Â m3/min was observed. Thus, such membranes would be effective for purifying a permeate stream after one-pass permeation through the TiO2 membranes. The decomposition of ethanol is also discussed.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Toshinori Tsuru, Takehiro Kan-no, Tomohisa Yoshioka, Masashi Asaeda,