期刊
JOURNAL OF RARE EARTHS
卷 30, 期 9, 页码 871-877出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1002-0721(12)60148-3
关键词
Mn-Cu mixed oxide catalysts; catalytic combustion; benzene; rare earths
资金
- National Natural Science Foundation of China [20773090]
- National High Technology Research and Development Program of China (863 Program) [2006AA06Z347]
- Youth Fund of Sichuan University [2008119]
A series of Mn-Cu mixed oxide catalysts were prepared by precipitation method. The catalysts were characterized by N-2 adsorption-desorption, H-2-TPR and XPS. When the loading ratio of manganese oxides to copper oxides was 8:2 or 7:3, the catalysts possessed better catalytic activity, and benzene was converted completely at 558 K. Results of H-2-TPR showed that the loading of a small amount of copper oxides decreased the reduction temperature of catalysts. Results of XPS showed that the loading of a small amount of copper oxides increased the proportion of manganese and defective oxygen on the surface of catalysts, and stabilized manganese at higher oxidation state. And the catalyst with the loading ratio 7:3 was a little worse than 8:2, since the interaction between manganese oxides and copper oxides is too strong, copper oxides migrate to the surface of catalysts and manganese oxides in excess are immerged.
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