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Effect of Oxide Phase of Promoters on Coke Resistance over Pt/gamma-Al2O3 Catalyst
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
2011-08-01
DOI10.3724/SP.J.1088.2011.10324
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
关键词[WOS]LIQUID ORGANIC HYDRIDES ; SPRAY-PULSED CONDITIONS ; PROPANE DEHYDROGENATION ; HETEROGENEOUS CATALYSIS ; ALKANE DEHYDROGENATION ; PLATINUM CATALYSTS ; SEASONAL STORAGE ; CYCLOHEXANE ; PERFORMANCE ; HYDROGEN
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.
语种英语
WOS记录号WOS:000294314000009
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142589
专题中国科学院大连化学物理研究所
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
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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.
APA Yu Jiafeng,Fang Wen,Ge Qingjie,&Xu Hengyong.(2011).Effect of Oxide Phase of Promoters on Coke Resistance over Pt/gamma-Al2O3 Catalyst.CHINESE JOURNAL OF CATALYSIS,32(8),1364-1369.
MLA Yu Jiafeng,et al."Effect of Oxide Phase of Promoters on Coke Resistance over Pt/gamma-Al2O3 Catalyst".CHINESE JOURNAL OF CATALYSIS 32.8(2011):1364-1369.
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