| 超微粒La-Co氧化物催化剂对柴油机尾气碳黑催化燃烧性能的研究 |
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| 引用本文： | 刘坚,赵震,徐春明,王虹,姜亚昌.超微粒La-Co氧化物催化剂对柴油机尾气碳黑催化燃烧性能的研究[J].中国稀土学报,2005,23(2):133-137. |
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| 作者姓名： | 刘坚 赵震 徐春明 王虹 姜亚昌 |
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| 作者单位： | 1. 石油大学重质油国家重点实验室,北京,102249
2. 广东惠州瑞尔稀土材料公司,广东,惠州,515000 |
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| 基金项目： | 国家自然科学基金(20473053)，教育部支持留学归国人员科学研究及实验室建设重点基金资助项目 |
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| 摘 要： | 用有机酸络合法制备了Co3O4，NiCo2O4和LaCo2O43种催化剂。通过程序升温氧化反应(TPO)技术对这3种催化剂进行模拟柴油碳黑催化燃烧反应的活性评价。研究发现以Co3O4为活性成分的催化剂能显著降低碳黑燃烧的温度。以Ni和La部分取代Co3O4后形成的复合氧化物NiCo2O4和混合氧化物LaCo2O4能改进Co3O4的氧化活性。但是NiCo2O4不能改进碳黑在松散接触时的燃烧活性；而混合氧化物LaCo2O4由于形成了超微粒含缺陷的LaCoO3钙钛矿型结构，它具有良好的低温氧化活性和表面原子移动性，因而能显著改进碳黑在松散接触时的燃烧活性。
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| 关 键 词： | 超微粒 催化剂 碳黑 催化燃烧 稀土 |
| 文章编号： | 1000-4343(2005)02-0133-05 |
Catalytic Combustion of Diesel Soot over Rare Earths Ultrafine Powder La-Co Complex Oxide Catalysts |
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| Liu Jian,Zhao Zhen,Xu Chunming,Wang Hong,Jiang Yachang.Catalytic Combustion of Diesel Soot over Rare Earths Ultrafine Powder La-Co Complex Oxide Catalysts[J].Journal of the Chinese Rare Earth Society,2005,23(2):133-137. |
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| Authors: | Liu Jian Zhao Zhen Xu Chunming Wang Hong Jiang Yachang |
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| Institution: | Liu Jian~1,Zhao Zhen~ |
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| Abstract: | Three kinds of catalysts were synthesized by organic acid compound method including Co_3O_4, NiCo_2O_4 and LaCo_2O_4. The catalytic perfermances of these catalysts for diesel soot catalytic combustion were investigated using temperature-programmed oxidation reactions. The results demonstrate that the catalysts containing Co_3O_4 active components can lower largely the temperature of soot combustion. NiCo_2O_4 and LaCo_2O_4 can enhance the catalytic activity of Co_3O_4. Under the condition of loose contact NiCo_2O_4 can not promote soot combustion, but LaCo_2O_4 can effectively promote soot combustion. This suggests that ultrafine powder perovskite-type catalyst LaCoO_3 produced, and which has good low temperature oxide ability and whose surface atoms are easily mobile. |
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| Keywords: | ultrafine powder catalysts soot catalytic combustion rare earths |
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