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CATALYTIC OXIDATION OF DIMETHYL SULFIDE WITH OZONE: EFFECT OF PROMOTER AND PHYSICO-CHEMICAL PROPERTIES OF METAL OXIDE CATALYSTS
Citation:
DEVULAPELLI, V. AND E. SAHLE-DEMESSIE. CATALYTIC OXIDATION OF DIMETHYL SULFIDE WITH OZONE: EFFECT OF PROMOTER AND PHYSICO-CHEMICAL PROPERTIES OF METAL OXIDE CATALYSTS. Presented at American Chemical Society 234th National Meeting & Exposition, Boston, MA, August 19 - 23, 2007.
Impact/Purpose:
To inform the public.
Description:
This study reports improved catalytic activities and stabilities for the oxidation of dimethyl sulfide (DMS), a major pollutant of pulp and paper mills. Ozone was used as an oxidant and Cu, Mo, V, Cr and Mn metal oxides, and mixed metal oxides support on y-alumina as catalysts over 100-200C. Maximum conversion of DMS was obtained using 10-wt% MnO2/y-A12O3 as a catalyst, however, the selectivity towards partial oxidation products such as dimethyl sulfoxide and dimethly sulfone are high (=20%). The best catalytic activity was over 10-wt% MnO2/y-alumina catalyst with 100% DMB conversion, high selectivity (=96%) towards complete oxidation products such as CO2 and SO2. Although MoO3/y-Al2O3 catalyst shows poor catalytic activity, MoO3 acts as a good promoter when used with CuO. This study also reports the optimization of reaction parameters and effects of physico-chemical properties of various catalysts on the catalytic activity.
