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Citation: ZHU Ling, WANG Xue-zhong, YU Jun-jie, HAO Zheng-ping. Catalytic Performance of K-Ce_0.5Zr_0.5O₂ Catalysts for Soot Combustion[J]. Acta Physico-Chimica Sinica, ;2005, 21(08): 840-845. doi: 10.3866/PKU.WHXB20050804 shu

Catalytic Performance of K-Ce_0.5Zr_0.5O₂ Catalysts for Soot Combustion

1.
Research Center of Eco-environmental Sciences, Chinese Academic Sciences, Beijing 100085; Chinese Research Academy of Environmental Sciences, Beijing 100012

Received Date: 6 December 2004
Available Online: 15 August 2005

xKNO₃-Ce_0.5Zr_0.5O₂ catalysts were prepared by incipient-wetness impregnation method, and the catalytic activities for the soot combustion were studied using TPO. XRD, BET, FT-IR and XPS were used to investigate the influences of KNO₃ concentration on the catalytic activities for soot combustion. It was found that the KNO3 had great effect on the surface area and the chemical environment. Compare with Ce_0.5Zr_0.5O₂, the catalytic activities of xKNO₃-Ce0.5Zr0.5O2 for soot combustion were improved significantly; the catalyst with x=0.5 had the best catalytic performance, on which Ti and Tp were 290 ℃ and 360 ℃, respectively. The results suggested that the formation of K₂CO₃ and molten KNO₃ phase during the reaction course promoted the catalytic activities obviously.
- Ce_0.5Zr_0.5O₂;KNO₃;Soot; Catalytic combustion
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沈阳化工大学材料科学与工程学院沈阳 110142

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通讯作者: 陈斌, bchen63@163.com

Catalytic Performance of K-Ce_0.5Zr_0.5O₂ Catalysts for Soot Combustion