Hiroyuki Kamata

SO2 oxidation over the V2O5/TiO2 SCR catalyst

The effects of V2O5 loading of the V2O5/TiO2 SCR catalyst on SO2 oxidation activity were examined by infrared spectroscopy (DRIFT) and SO2 oxidation measurement. Vanadium oxide added to the catalyst was found to be well dispersed over the TiO2 carrier until covered with monolayer V2O5. The rate of SO2 oxidation increased almost linearly with V2O5 loading below the monolayer capacity and attained saturation with further increase. The hydroxyl groups bonded to vanadium atoms, V–OH, might be altered by SO2 oxidation. Both V=O and V–OH groups are likely involved in the adsorption and desorption of SO2 and SO3.

112 Comparative study on the hydrogen production from methanol over Cu/ZnO/Al2O3 and Pd/ZnO Catalysts

Abstract Hydrogen production from methanol through both non-oxidative and oxidative steam reforming over Cu/ZnO/Al 2 O 3 and Pd/ZnO catalysts was investigated by catalyst characterizations, and CH 3 OH reforming reactions. Over both Cu/ZnO/Al 2 O 3 and Pd/ZnO, CH 3 OH steam reforming, both non-oxidative and oxidative, was observed to proceed efficiently. For Cu/ZnO/Al 2 O 3 , hydrogen production rate and CO 2 selectivity were greatly dependent on Cu/Zn/Al metal ratio and preparation temperature. For Pd/ZnO, hydrogen production rate and CO 2 selectivity were found to be improved by an appropriate increase of Pd loading. PdZn alloy formed by pre-treatment reduction was confirmed to be stable under oxidative steam reforming conditions by X-ray analyses.