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题名: Effect of Structure of Pd/WO3-ZrO2 Catalyst on Its Activity for Direct Oxidation of Ethylene to Acetic Acid
作者: Wang Lixia1, 2;  Xu Shuliang1, 2;  Chu Wenling1;  Yang Weishen1
通讯作者: 楚文玲 ;  杨维慎
关键词: tungstate ;  zirconia ;  palladium ;  ethylene oxidation ;  acetic acid
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2009-09-01
卷: 30, 期:9, 页:864-872
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 504
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: A series of 1%Pd/WO3-ZrO2 catalysts with different W/Zr ratios and calcination temperatures of WO3-ZrO2 were prepared by an impregnation method. Their crystal structure, surface state, and acidity were determined using X-ray diffraction, N-2 adsorption, NH3 temperature-programmed desorption, pyridine infrared spectroscopy, and temperature-programmed reduction. Special attention was paid to the surface states of tungsten and palladium under different preparation conditions. The results revealed that WOx surface species underwent a transformation from polytungstate species to coexistent polytungstate/crystalline WO3 and further to crystalline WO3 particles with increase of W/Zr ratio and calcination temperature. The W/Zr = 0.2 sample calcined at 1 073 K showed the maximum amount of polytungstates, which were responsible for the excellent activity. Moreover, the state of palladium was only dependent on the calcination temperature. Well-dispersed Pd species were responsible for high selectivity to acetic acid, and large metallic Pd particles were favorable for ethylene combustion.
关键词[WOS]: TUNGSTATED ZIRCONIA CATALYSTS ;  SOLID ACID ;  SELECTIVE OXIDATION ;  OXIDE DOMAINS ;  PERFORMANCE ;  PALLADIUM ;  TRANSESTERIFICATION ;  SUPPORTS ;  WOX/ZRO2 ;  HYDROGEN
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000271079600004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/101995
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Wang Lixia,Xu Shuliang,Chu Wenling,et al. Effect of Structure of Pd/WO3-ZrO2 Catalyst on Its Activity for Direct Oxidation of Ethylene to Acetic Acid[J]. CHINESE JOURNAL OF CATALYSIS,2009,30(9):864-872.
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