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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
KeywordMetal Oxide Platinum Alumina Cyclohexane Dehydrogenation Coke Resistance
Source PublicationCHINESE JOURNAL OF CATALYSIS
2011-08-01
DOI10.3724/SP.J.1088.2011.10324
Volume32Issue:8Pages:1364-1369
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordLIQUID ORGANIC HYDRIDES ; SPRAY-PULSED CONDITIONS ; PROPANE DEHYDROGENATION ; HETEROGENEOUS CATALYSIS ; ALKANE DEHYDROGENATION ; PLATINUM CATALYSTS ; SEASONAL STORAGE ; CYCLOHEXANE ; PERFORMANCE ; HYDROGEN
AbstractThe 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.
Language英语
WOS IDWOS:000294314000009
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/142589
Collection中国科学院大连化学物理研究所
Affiliation1.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
GB/T 7714
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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