Transition metal/fluorite-type oxides as active catalysts for reduction of sulfur dioxide to elemental sulfur by carbon monoxide
نویسندگان
چکیده
Reduction of SO, by CO to elemental sulfur on fluorite oxide and transition metal/fluorite oxide composite catalysts is discussed within the redox framework. The oxygen vacancies on the fluorite oxide are active catalyst sites and their creation is a key step to initiate the redox reaction. Transition metal/fluorite oxide composites demonstrate a strong synergism for the reaction. A reduction kinetics study of the copper/ceria system as a model composite catalyst has found that surface oxygen is highly active but its activity is inhibited by SO, adsorption. The TPR profile of the copper/ceria catalyst shows a significantly lower reduction peak than the individual components.
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