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硬模板法制备铈基复合氧化物及其对甲苯燃烧的催化性能

兰海,  周桂林,  杨兴会,  任圆圆,  谢红梅

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文章导航 > 燃料化学学报（中英文）  > 2015 >  43(04): 483-489
兰海, 周桂林, 杨兴会, 任圆圆, 谢红梅. 硬模板法制备铈基复合氧化物及其对甲苯燃烧的催化性能[J]. 燃料化学学报（中英文）, 2015, 43(04): 483-489.
引用本文: 兰海, 周桂林, 杨兴会, 任圆圆, 谢红梅. 硬模板法制备铈基复合氧化物及其对甲苯燃烧的催化性能[J]. 燃料化学学报（中英文）, 2015, 43(04): 483-489.
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LAN Hai, ZHOU Gui-lin, YANG Xing-hui, REN Yuan-yuan, XIE Hong-mei. Catalytic combustion of toluene over the Ce-based composite oxides prepared by hard-template methods[J]. Journal of Fuel Chemistry and Technology, 2015, 43(04): 483-489.
Citation: LAN Hai, ZHOU Gui-lin, YANG Xing-hui, REN Yuan-yuan, XIE Hong-mei. Catalytic combustion of toluene over the Ce-based composite oxides prepared by hard-template methods[J]. Journal of Fuel Chemistry and Technology, 2015, 43(04): 483-489.
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硬模板法制备铈基复合氧化物及其对甲苯燃烧的催化性能

  • 重庆工商大学材料科学与工程系 催化与功能有机分子重庆市重点实验室, 重庆 400067

基金项目: 重庆市教委科学技术研究项目(KJ1400610)。
详细信息
    通讯作者:

    周桂林, 男, 博士, 教授, 主要从事纳米材料控制合成与低碳分子催化转化的研究。E-mail:upcglzhou@sohu.com, dicpglzhou@ctbu.edu.cn。

  • 中图分类号: O643.36

Catalytic combustion of toluene over the Ce-based composite oxides prepared by hard-template methods

  • Chongqing Key Laboratory of Catalysis & Functional Organic Molecules, Department of Materials Science Engineering, Chongqing Technology and Business University, Chongqing 400067, China

    摘要
  • 摘要: 采用硬模板法制得CeM-HT(M=Cu、Mn、Fe和Co)复合氧化物催化剂,借助XRD、BET、O2-TPD和H2-TPR研究了催化剂的物理化学性质,通过甲苯催化燃烧探针反应评价了催化剂的催化性能。结果表明,CuO、MnOx、FeOx和Co3O4能溶入CeO2晶格形成Ce-O-Cu、Ce-O-Mn、Ce-O-Fe和Ce-O-Co固溶体,Cu和Mn离子的溶入导致CeO2晶格发生了较大程度的晶格畸变,Fe和Co离子对CeO2晶格的影响较小,且在CeCo-HT氧化物催化剂中还存在微量晶相Co3O4。所制得的CeM-HT氧化物催化剂表现出了优越的甲苯催化燃烧性能,在反应温度为300、270、260和230 ℃时,CeFe-HT、CeCo-HT、CeMn-HT和CeCu-HT氧化物催化剂上甲苯的催化燃烧转化率分别达93.7%、95.0%、96.5%和95.0%以上。Ce基复合氧化物催化剂的甲苯催化燃烧活性顺序与其氧脱附性能、储氧性能和可还原性能具有正相关性,遵从顺序为CeCu-HT > CeMn-HT > CeCo-HT > CeFe-HT。
    Abstract: Ce-based composite oxides (CeM-HT, M=Cu, Mn, Fe, and Co) were prepared by the hard-template method and characterized by XRD, O2-TPD, nitrogen physisorption, and H2-TPR; their catalytic performance in toluene combustion was investigated. The results show that CuO, MnOx, FeOx, and Co3O4 can be well dissolved into the CeO2 lattice, forming Ce-O-Cu, Ce-O-Mn, Ce-O-Fe, and Ce-O-Co solid solutions, respectively. The CeO2 lattice is significantly distorted by the incorporation of Cu and Mn ions, but less affected by the doping of Fe and Co ions. Moreover, a little amount of Co3O4 crystal exists in the CeCo-HT oxide catalyst. The Ce-based composite oxides exhibit excellent catalytic performance in toluene combustion; the toluene conversions over CeFe-HT, CeCo-HT, CeMn-HT, and CeCu-HT oxide catalysts reach 93.7% at 300 ℃, 95.0% at 270 ℃, 96.5% at 260 ℃, and 95.0% at 230 ℃, respectively. The catalytic activity of the Ce-based composite oxides is closely related to their oxygen desorption amount, oxygen storage capacity, and reducibility, following the order of CeCu-HT > CeMn-HT > CeCo-HT > CeFe-HT.
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出版历程
  • 收稿日期:  2014-11-05
  • 刊出日期:  2015-04-30

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