Abstract
TiO 2/activated carbon composite photocatalyst was prepared by a microwave-assisted impregnation method and was employed for the removal of methanol from humid air streams. A commercial microwave oven (800 W) was used as the microwave source. Under 2450 MHz microwave irradiation, titanium tetra-isopropoxide (TTIP) was quickly hydrolyzed and anatase TiO 2 was formed in a short time (<20 min). As a result of the volumetric heating and selective heating of the microwave, the solvent and byproducts were quickly removed which reduced energy consumption and processing time. The formed submicrometer TiO 2 particles mainly deposited on the external surface of carbon. In a packed bed reactor with an empty bed contact time of 0.35 s, the prepared materials maintained a 40% removal efficiency at an inlet methanol concentration of 39 ppm. When the TTIP-conversion was complete, neither the irradiation time nor the water/TTIP ratio could further change the photocatalytic activity.
Original language | English (US) |
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Pages (from-to) | 5110-5116 |
Number of pages | 7 |
Journal | Industrial and Engineering Chemistry Research |
Volume | 45 |
Issue number | 14 |
DOIs | |
State | Published - Jul 5 2006 |
All Science Journal Classification (ASJC) codes
- General Chemistry
- General Chemical Engineering
- Industrial and Manufacturing Engineering