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题名: Effect of Oxide Phase of Promoters on Coke Resistance over Pt/gamma-Al2O3 Catalyst
作者: Yu Jiafeng1, 3;  Fang Wen1, 3;  Ge Qingjie1;  Xu Hengyong1, 2
关键词: metal oxide ;  platinum ;  alumina ;  cyclohexane dehydrogenation ;  coke resistance
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2011-08-01
DOI: 10.3724/SP.J.1088.2011.10324
卷: 32, 期:8, 页:1364-1369
收录类别: SCI
文章类型: Article
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: The effects of different promoters on coke deposition over Pt/Al2O3 catalyst for hydrogen-free cyclohexane dehydrogenation were investigated by catalytic tests and a series of analytical techniques such as X-ray diffraction, CO and H-2 chemisorption, temperature-programmed desorption of NH3, and temperature-programmed reduction. The stability of different promoters modified catalysts is in the order of Zr-Pt/Al2O3 > Ca-Pt/Al2O3 > Ce-Pt/Al2O3 > Zn-Pt/Al2O3 > Ba-Pt/Al2O3. The results clearly show that the addition of promoters to the Pt/Al2O3 catalyst could inhibit coke deposition by increasing Pt dispersion and promoting hydrogen spillover. That is attributed to the high thermodynamic and chemical stability of the metal oxide promoters. They must be highly dispersed and stable without reacting with Al2O3 in calcination or forming alloy with Pt in reduction. The catalytic property of CaLa-Pt/Al2O3 is worse than either Ca-Pt/Al2O3 or La-Pt/Al2O3 because the acidity of catalyst is enhanced and the spillover hydrogen is reduced due to Ca-La strong interaction.
关键词[WOS]: LIQUID ORGANIC HYDRIDES ;  SPRAY-PULSED CONDITIONS ;  PROPANE DEHYDROGENATION ;  HETEROGENEOUS CATALYSIS ;  ALKANE DEHYDROGENATION ;  PLATINUM CATALYSTS ;  SEASONAL STORAGE ;  CYCLOHEXANE ;  PERFORMANCE ;  HYDROGEN
语种: 英语
WOS记录号: WOS:000294314000009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142589
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, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Yu Jiafeng,Fang Wen,Ge Qingjie,et al. Effect of Oxide Phase of Promoters on Coke Resistance over Pt/gamma-Al2O3 Catalyst[J]. CHINESE JOURNAL OF CATALYSIS,2011,32(8):1364-1369.
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