Macroporous perovskite-type complex oxide catalysts of La_(1-x)K_xCo_(1-y)Fe_yO_3 for diesel soot combustion
来源期刊：JOURNAL OF RARE EARTHS2009年第6期
论文作者：JING Yanni DUAN Aijun LIU Jian ZHANG Guizhen JIANG Guiyuan XU Junfeng ZHAO Zhen
Key words：macroporous perovskite-type oxides; diesel engine exhaust; soot; catalytic combustion; rare earths;
Abstract: A facile procedure was carded out to prepare macroporous perovskite-type complex oxide catalysts of La_(1-x)K_xCo_(1-y)Fe_yO_3 (x=0,0.1, y=0, 0.1) by using the combined method of organic ligation and solution combustion. This method could ensure the formation of the de-sired macroporous structures and the desired crystal phases of the prepared catalysts. It was found that the macroporous catalysts showed higher catalytic activities for soot combustion than that of the corresponding nanometric samples, and the macroporous catalyst La_(0.9)K_(0.1)CoO_3 was the best candidate catalyst for soot combustion, the activity of which was as good as supported Pt catalysts.
JING Yanni1，DUAN Aijun1，LIU Jian1，ZHANG Guizhen1，JIANG Guiyuan1，XU Junfeng1，ZHAO Zhen1
(1.State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China)
Abstract:A facile procedure was carded out to prepare macroporous perovskite-type complex oxide catalysts of La_(1-x)K_xCo_(1-y)Fe_yO_3 (x=0,0.1, y=0, 0.1) by using the combined method of organic ligation and solution combustion. This method could ensure the formation of the de-sired macroporous structures and the desired crystal phases of the prepared catalysts. It was found that the macroporous catalysts showed higher catalytic activities for soot combustion than that of the corresponding nanometric samples, and the macroporous catalyst La_(0.9)K_(0.1)CoO_3 was the best candidate catalyst for soot combustion, the activity of which was as good as supported Pt catalysts.
Key words:macroporous perovskite-type oxides; diesel engine exhaust; soot; catalytic combustion; rare earths;
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