Catalytic Performance of Ce/Zr Oxides Catalysts for Soot Combustion
来源期刊：JOURNAL OF RARE EARTHS2004年第6期
论文作者：朱玲 王学中 郝郑平
Key words：CexZr1-xO2; soot; catalytic combustion; rare earths;
Abstract: Catalytic performances of a series Ce/Zr oxides(CexZr1-xO2)for soot combustion were investigated. The catalytic activities for soot combustion were affected by both the Ce/Zr ratio and the oxygen storage capability of Ce/Zr oxides. O2-TPD and TG-DTA results indicate that CexZr1-xO2 can release its lattice oxygen continuously and promote soot combustion even no oxygen occurs in the reaction atmosphere. Among these Ce/Zr oxides, Ce0.5Zr0.5O2 has the best catalytic activity, and the ignition temperature of soot combustion was about 410 ℃, which is close to the practical exhaust temperature of the diesel engine.
朱玲1，王学中2，郝郑平1
(1.Research Center of Eco-Environmental Sciences, Chinese Academiy of Sciences, Beijing 100085,China;
2.Chinese Research Academy of Environmental Sciences, Beijing 100012,China)
Abstract:Catalytic performances of a series Ce/Zr oxides(CexZr1-xO2)for soot combustion were investigated. The catalytic activities for soot combustion were affected by both the Ce/Zr ratio and the oxygen storage capability of Ce/Zr oxides. O2-TPD and TG-DTA results indicate that CexZr1-xO2 can release its lattice oxygen continuously and promote soot combustion even no oxygen occurs in the reaction atmosphere. Among these Ce/Zr oxides, Ce0.5Zr0.5O2 has the best catalytic activity, and the ignition temperature of soot combustion was about 410 ℃, which is close to the practical exhaust temperature of the diesel engine.
Key words:CexZr1-xO2; soot; catalytic combustion; rare earths;
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