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Al₂O₃ TiO₂ 담체종류별 Pt, PtRu 촉매의 산화특성
김문찬,신진실,이동구,최균 한국공업화학회 2005 응용화학 Vol.9 No.1
The volatile organic compounds (VOCs) have been recognized as major contributor to air pollution. The catalytic oxidation is one of the most important processes for VOCs destruction clue to getting high efficiency at low temperature. In this study, mono metallic Pt and bimetallic Pt-Ru were supported to TiO₂ and γ-Al₂O₃. In order to distribute metals uniformly, Xylene, toluene and MEK were used as reactants. The mono metallic or bimetallic catalysts were prepared by the excess wetness impregnation method and were characterized by XRD, XPS, TEM and BET analysis. As a result, Pt-Ru bimetallic catalysts were showed higher conversion than Pt mono metallic catalyst. Pt-Ru bimetallic catalyst was showed highest conversion on the γ-Al₂O₃support. In the VOCs oxidation, Pt-Ru bimetallic catalyst had multi point active sites, so it improved the range of Pt metal state. Therefore, bimetallic catalysts were higher conversion of VOCs than mono metallic ones.
Al₂O₃ 담체상에서 귀금속 담지 촉매의 Water Pretreatment 영향
김문찬,신진실 한국공업화학회 2005 응용화학 Vol.9 No.1
In this study, monometallic Pt and bimetallic Pt-Ru, Pt-Ir were supported to γ-Al₂O₃. In order to distribute metals uniformly, H₂O-H₂ treatment method was used. Xylene and MEK were used as reactants. The monometallic or bimetallic catalysts were prepared by the excess wetness impregnation method and were characterized by XRD, XPS, TEM analysis. As a result, Pt-Ru, Pt-Ir bimetallic catalysts were showed higher conversion than Pt monometallic catalyst. The catalysts which used H₂O-H₂ treatment had better VOC's conversion than that of nothing treatment on the γ-Al₂O₃ support. Pt-Ir bimetallic catalyst was showed highest conversion on the γ-Al₂O₃ support. The effect of H₂O-H₂ treatment was uniform distribution of Pt particles. The activation energy of H₂O-H₂ treatment catalysts were lower than that of nothing treatment ones on the γ-Al₂O₃ support. In this study, the use of small amount of Ru, Ir to Pt promoted oxidation conversion of VOCs. In addition to, H₂O-H₂ treatment promoted oxidation conversion of VOCs on the γ-Al₂O₃ support.