CO Selective Oxidation in Hydrogen-Rich Gas over Copper-Series Catalysts

摘要/Abstract

摘要： The performances of CO selective oxidation in hydrogen-rich gas over four catalytic systems of CuO/ZrO2, CuO/MnO2, CuO/CoO and CuO/CeO2 were compared. The reducibility of these catalysts and the effect of CuO and CeO2 molar ratio of CuO/CeO2 catalysts on the activity of selective CO oxidation are investigated by XRD and TPR methods. The results show that the catalysts with the exception of CuO/ZrO2 have the interactions between CuO and CoO, CeO2 or MnO2, which result in a decrease in the reduction temperature. Among the catalysts studied, CuO/ZrO2 catalyst shows the lowest catalytic activity while CuO/CeO2 catalyst exhibits the best catalytic performance. The CuO(10%)/CeO2 catalyst attains the highest CO conversion and selectivity at 140 and 160oC. The addition of 9% H2O in the reactant feed decreases the activity of CuO/CeO2 catalyst but increases its CO selectivity.

关键词: hydrogen-rich gas, copper-series catalyst, CuO/CeO2 catalyst, selective oxidation, carbon

Abstract: The performances of CO selective oxidation in hydrogen-rich gas over four catalytic systems of CuO/ZrO2, CuO/MnO2, CuO/CoO and CuO/CeO2 were compared. The reducibility of these catalysts and the effect of CuO and CeO2 molar ratio of CuO/CeO2 catalysts on the activity of selective CO oxidation are investigated by XRD and TPR methods. The results show that the catalysts with the exception of CuO/ZrO2 have the interactions between CuO and CoO, CeO2 or MnO2, which result in a decrease in the reduction temperature. Among the catalysts studied, CuO/ZrO2 catalyst shows the lowest catalytic activity while CuO/CeO2 catalyst exhibits the best catalytic performance. The CuO(10%)/CeO2 catalyst attains the highest CO conversion and selectivity at 140 and 160oC. The addition of 9% H2O in the reactant feed decreases the activity of CuO/CeO2 catalyst but increases its CO selectivity.

Key words: hydrogen-rich gas, copper-series catalyst, CuO/CeO2 catalyst, selective oxidation, carbon

Hanbo Zou;Xinfa Dong;Weiming Lin. CO Selective Oxidation in Hydrogen-Rich Gas over Copper-Series Catalysts[J]. 能源化学(英文), 2005, 14 (1): 29-34.

Hanbo Zou;Xinfa Dong;Weiming Lin. CO Selective Oxidation in Hydrogen-Rich Gas over Copper-Series Catalysts[J]. Journal of Energy Chemistry, 2005, 14 (1): 29-34.

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