M_xo_y / Ceramic Honeycomb Catalyst Of Small Organic Molecules On The Catalytic Oxidation,

1 Selective catalytic oxidation of ethanolIn this thesis, honeycomb ceramics-supported transition metal oxides were employed as catalysts in order to investigate the selective oxidation of alcohols more precisely. The selective oxidation of ethanol to acetaldehyde was selected as a probe reaction. We also investigate the degradation of ethanol. The catalytic activity and selectivity of different catalyst has been studied extensively. The properties of the catalysts have been examined using XRD SEM BET Energy spectrum analysis, etc. For catalyst Cr2O3-Co2O3-CuO/Al2O3/ceramics, when temperature reaches 250 ℃, conversion of ethanol is 70.5%, and selectivity to acetaldehyde is 96.6%.For the reaction of selective oxidation of ethanol it is the optimal catalyst. While for catalyst Cr2O3-Co2O3-PtO2 /Al2O3/ceramics, when temperature reaches 280℃, conversion is 100%, it is the optimal catalyst for the reaction of ethanol degradation.2. Catalytic degradation of formaldehydeCatalytic combustion for controlling volatile organic compound's (vocs) emissions at relatively low operating temperatures is a well-known technology in comparison to the case of the more conventional thermal regenerative oxidation, In our study, the oxidation of formaldehyde over different catalyst was selected as a probe reaction. The reaction has been studied extensively over honeycomb ceramics-supported transition mental oxides using clean and atom-efficient oxidants such as molecular O2. The catalytic activity of different catalyst has been studied extensively. The properties of thecatalysts have been examined using XRD;SEM, BET . Energy spectrum analysis, etc. Of ten catalysts, catalyst Cr2O3-Co2O3-Rh2O3/Al2O3 /ceramics Cr2O3-Co2O3-Ag2O /Al2O3ceramics Cr2O3-Co203-PtO2/Al2O3/ceramics are better than others. When formaldehyde is totally transformed, over Cr2O3-Co2O3 Rh2O3 Al2O3/ceramics temperature needs to reach 293K. And over catalyst Cr2O3-Co2O3 / Ag2O/Al2O3 /ceramics Cr2O3-Co2O3-PtO2/Al2O3ceramics temperature needs 373K, 383K respectively. But considering the economical factor, catalyst Cr2O3-Co203-Ag20 /Al2O3ceramics is the optimal catalyst. The activities over different catalysts for degradation reaction of formaldehyde and ethanol were compared ,too.3. Catalytic degradation of acetoneIn this study, we intended to investigate catalytic combustion for controlling volatile organic compounds (vocs) emissions at relatively low operating temperatures more precisely. The oxidation of acetone over different catalyst was selected as a probe reaction. The reaction has been studied extensively over honeycomb ceramics-supported transition mental oxides using clean and atom-efficient oxidants such as molecular 02. The catalytic activity of different catalyst has been studied extensively. The properties of the catalysts have been examined using XRD SEM BET Energy spectrum analysis, etc. Over catalyst Cr2O3-Co203-PtO2/Al2O3/ceramics, acetone will not be totally transformed until the temperature reaches 533K. The temperature it needs is lower than any of the others of the ten catalysts and it is considered as the optimal catalyst. The activities over different catalysts for degradation reaction of formaldehyde,ethanol and acetone were compared,too.