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A Effect of H2O-H2 Pretreatment on VOCs Oxidation over Noble Catalysts on Titania  

Kim, Moon-Chan (Department of Environmental Engineering, Cheongiu University)
Ko, Sun-Hwan (Department of Environmental Engineering, Cheongiu University)
Publication Information
Applied Chemistry for Engineering / v.18, no.6, 2007 , pp. 552-556 More about this Journal
Abstract
In this study, noble metals (Pd, Ru, Ir) were supported to $TiO_2$ catalyst. In order to distribute metals uniformly, $H_2O-H_2$ pretreatment technique was used. Xylene, toluene, and MEK were used as reactants. The monometallic or bimetallic catalysts were prepared by the excess wetness impregnation method and were characterized by XRD, and XPS analysis. Pd-Ru, Pd-Ir bimetallic catalysts had multipoint active sites which improved the range of Pd metal state. Bimetallic catalysts had a higher conversion of VOCs than that of monometallic one. The effect of $H_2O-H_2$ pretreatment technique was the enhancement of uniform distribution of Pd particles and promotion of catalytic efficiency. In this study, addition of Ru and Ir metals to Pd promoted oxidation conversion of VOCs. In addition, $H_2O-H_2$ pretreatment promoted removal efficiency of VOCs on the $TiO_2$ support.
Keywords
volatile organic compounds (VOCs); Pd-Ru; Pd-Ir; titania; $H_2O-H_2$-pretreatment;
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