沉淀剂对Cu-Mn-Ce复合氧化物催化剂结构和性能的影响

doi:10.11949/j.issn.0438-1157.20141930

化工学报 ›› 2015, Vol. 66 ›› Issue (6): 2105-2111.DOI: 10.11949/j.issn.0438-1157.20141930

• 催化、动力学与反应器 • 上一篇下一篇

沉淀剂对Cu-Mn-Ce复合氧化物催化剂结构和性能的影响

卢晗锋, 黄金星, 周瑛, 朱秋莲, 陈银飞

浙江工业大学化学工程学院, 催化反应工程研究所, 浙江杭州 310014

收稿日期:2014-12-29 修回日期:2015-03-03 出版日期:2015-06-05 发布日期:2015-06-05
通讯作者: 陈银飞
基金资助:
国家自然科学基金项目(21107096);浙江省自然科学基金项目(LY14E080008);浙江省重大科技专项(2013C03021)。

Effect of precipitants on structure and performance of Cu-Mn-Ce mixed oxide catalysts

LU Hanfeng, HUANG Jinxing, ZHOU Ying, ZHU Qiulian, CHEN Yinfei

Institute of Catalytic Reaction Engineering, School of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China

Received:2014-12-29 Revised:2015-03-03 Online:2015-06-05 Published:2015-06-05
Supported by:
supported by the National Natural Science Foundation of China (21107096) and the Natural Science Foundation of Zhejiang Province(LY14E080008).

摘要/Abstract

摘要：

为了避免柠檬酸溶胶-凝胶法制备过程中环境问题, 采用共沉淀法制备了Cu-Mn-Ce复合氧化物催化剂, 以催化燃烧甲苯为模型反应, 考察了沉淀剂对Cu-Mn-Ce催化结构和性能的影响。结果表明, 以NaOH作为沉淀剂催化剂效果最佳, 其次为NH₃·H₂O、K₂CO₃、Na₂C₂O₄。采用NaOH作为沉淀剂, 氢氧化物前体在焙烧活化过程中更易使Cu、Mn离子进入CeO₂的立方结构, 形成具有缺陷结构的CeO₂固溶体, 从而提高了表面氧浓度和活动性, 在燃烧反应中表现出更优异的催化特性。

关键词: 催化燃烧, VOCs, Cu-Mn-Ce复合氧化物, 共沉淀, 催化剂, 氧化, 有机化合物

Abstract:

Cu-Mn-Ce(CMC) ternary mixed oxides were prepared by the co-precipitation method with different precipitants, and evaluated in catalytic combustion of toluene. The catalyst prepared with NaOH(CMC-NaOH)exhibited the highest catalytic activity, followed by the catalyst prepared with NH₃•H₂O, K₂CO₃, and Na₂C₂O₄. The precursors of hydroxide derived from NaOH had strong interaction, and Cu, Mn ions more easily entered the lattice of CeO₂ fluorite structure to form CeO₂ solid solution during calcination. As a result, the structure containing Cu-Mn mixed oxides and CeO₂ solid solution enhanced the mobility of active oxygen owing to abundant defective sites on the surface, which benefited catalytic combustion of toluene.

Key words: catalytic combustion, VOCs, Cu-Mn-Ce oxide, co-precipitation, catalyst, oxidation, organic compounds

中图分类号:

TQ032
O643

卢晗锋, 黄金星, 周瑛, 朱秋莲, 陈银飞. 沉淀剂对Cu-Mn-Ce复合氧化物催化剂结构和性能的影响[J]. 化工学报, 2015, 66(6): 2105-2111.

LU Hanfeng, HUANG Jinxing, ZHOU Ying, ZHU Qiulian, CHEN Yinfei. Effect of precipitants on structure and performance of Cu-Mn-Ce mixed oxide catalysts[J]. CIESC Journal, 2015, 66(6): 2105-2111.

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沉淀剂对Cu-Mn-Ce复合氧化物催化剂结构和性能的影响

Effect of precipitants on structure and performance of Cu-Mn-Ce mixed oxide catalysts

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