Oxidation of sulfur dioxide to sulfur trioxide over supported vanadia catalysts Joseph P. Dunn, Prashanth R. Koppula, Harvey G. Stenger, Israel E. Wachs* Zettlemoyer Center for Surface Studies, Department of Chemical Engineering, Lehigh University,...
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Oxidation of sulfur dioxide to sulfur trioxide over supported vanadia catalysts Joseph P. Dunn, Prashanth R. Koppula, Harvey G. Stenger, Israel E. Wachs* Zettlemoyer Center for Surface Studies, Department of Chemical Engineering, Lehigh University, Bethlehem, PA 18015, USA Accepted 2 June 1998 Abstract The objectives of this research are to establish the fundamental kinetics and mechanism of sulfur dioxide oxidation over supported vanadia catalysts and use these insights to facilitate the design of SCR DeNOx catalysts with minimal sulfur dioxide oxidation activity. A series of supported vanadia catalysts were prepared on various metal-oxide supports: ceria, zirconia, titania, alumina and silica. Raman spectroscopy was used to determine the coordination of surface species. At low vanadia loadings, vanadia preferentially exists on oxide support surfaces as isolated tetrahedrally coordinated (M±O)3V5 O species. At higher vanadia loadings, the isolated (M±O)3V5 O species polymerize on
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