| 铈铁锆三元复合氧化物上碳烟的催化燃烧 |
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| 引用本文： | 晏冬霞,王华,李孔斋,魏永刚,祝星,程显名. 铈铁锆三元复合氧化物上碳烟的催化燃烧[J]. 燃料化学学报, 2011, 39(3): 229-235 |
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| 作者姓名： | 晏冬霞 王华 李孔斋 魏永刚 祝星 程显名 |
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| 作者单位： | 1.Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650024, China;2.Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China |
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| 基金项目： | 国家自然科学基金，国家自然科学基金重大研究计划，云南省自然科学基金 |
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| 摘 要： | 采用水热法制备了纯CeO2、Fe2O3和系列Ce0.5Fe0.5-xZrxO2复合氧化物催化剂，采用XRD、Raman、H2-TPR和BET等方法对其进行了表征，并利用程序升温氧化反应(TPO)技术研究了其碳烟燃烧催化性能。结果表明，Zr4+完全进入CeO2晶格中形成了固溶体，而Fe3+较难进入CeO2晶格中，部分Fe2O3分散在固溶体表面。固溶体形成产生的氧空位和表面高度分散的氧化铁协同作用是铈铁锆三元复合氧化物具有较高碳烟燃烧催化性能的关键。同时，与单纯的铈铁二元复合氧化物相比，Zr4+的掺杂明显提高了催化剂的抗老化能力，使Ce0.5Fe0.5-xZrxO2复合氧化物显示出更好的应用前景。在系列样品中，Ce0.5Fe0.30Zr0.20O2样品由于形成了最多的固溶体并具有良好分散性的表面Fe2O3，显示出最好的催化活性和稳定性。其催化碳烟的起燃温度(ti)和峰顶温度(tp)分别为251℃和310℃，长时间高温老化后其ti和tp仍较低，分别为273℃和361℃。
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| 关 键 词： | font-size: 9pt,line-height: 150%" >铈铁锆三元复合氧化物,水热法,碳烟,催化燃烧,固溶体,协同作用, |
| 收稿时间： | 2010-04-21 |
Catalytic combustion of soot on Ce-Fe-Zr-O ternary mixed oxide catalysts |
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| YAN Dong-xia,WANG Hua,LI Kong-zhai,WEI Yong-gang,ZHU Xing,CHENG Xian-ming. Catalytic combustion of soot on Ce-Fe-Zr-O ternary mixed oxide catalysts[J]. Journal of Fuel Chemistry and Technology, 2011, 39(3): 229-235 |
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| Authors: | YAN Dong-xia WANG Hua LI Kong-zhai WEI Yong-gang ZHU Xing CHENG Xian-ming |
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| Affiliation: | YAN Dong-xia1,WANG Hua2,LI Kong-zhai2,WEI Yong-gang2,ZHU Xing2,CHENG Xian-ming1(1.Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming 650024,China,2.Faculty of Metallurgy and Energy Engineering,Kunming 650093,China) |
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| Abstract: | Pure CeO2,Fe2O3 and a series of Ce0.5Fe0.5-xZrxO2 mixed oxide catalysts for soot catalytic combustion were prepared via hydrothermal method and characterized by XRD,Raman spectroscopy,H2-TPR and BET measurements.The catalytic activities in the diesel soot oxidation were tested by using temperature-programmed oxidation(TPO) reaction apparatus.The results show that all of the Zr4+ incorporated into the CeO2 lattice to form a solid solution.On the other hand,Fe3+ is extremely difficult to dissolve into the CeO... |
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| Keywords: | Ce-Fe-Zr-O ternary mixed oxide hydrothermal method soot catalytic combustion solid solution synergetic effect |
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