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题名: Influences of calcination temperature on the efficiency of CaO promotion over CaO modified Pt/gamma-Al2O3 catalyst
作者: Yu, Jiafeng1, 2;  Ge, Qingjie1;  Fang, Wen1, 2;  Xu, Hengyong1, 3
关键词: CaO promotion effect ;  Calcination temperature ;  Pt/gamma-Al2O3 catalyst ;  CaO particle size ;  Ca-Al interaction
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2011-03-15
DOI: 10.1016/j.apcata.2011.01.031
卷: 395, 期:1-2, 页:114-119
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: The cyclohexane dehydrogenation on CaO modified Pth-Al2O3 was investigated with the aim of understanding the influences of calcination temperature of CaO modified gamma-Al2O3 support (Ca/Al) on the efficiency of CaO promotion. The results showed that the catalyst calcined at 600 degrees C exhibited the worst, while the one calcined at 800 degrees C showed the best catalytic performance during the variation of Ca/Al calcination temperature from 500 to 900 degrees C. The catalyst pretreated at 800 degrees C exhibited an excellent hydrogen productivity of up to 4.45 L/(g(cat) h) and high stability during 80h continuous investigation of cyclohexane dehydrogenation in the absence of co-feed hydrogen at 300 degrees C and 8000 h(-1) space velocity. That was attributed to weaker Pt-Al interaction and higher dispersed Pt, deriving from larger CaO particles. According to XRD spectra of model catalysts and CO2-TPD of Ca-Pt/Al catalysts, the efficiency of CaO promotion depended on the Ca-Al interaction strength and particle size instead of quantity of free CaO particles. The main calcium compound was free CaO in catalysts with low CaO content and low calcination temperature (below 800 degrees C). Complex CaO with high Ca-Al interaction strength and less CaO properties are formed in Ca900-Pt/AI catalyst. (c) 2011 Elsevier B.V. All rights reserved.
关键词[WOS]: BASIC CATALYSTS ;  PROPANE DEHYDROGENATION ;  ALKANE DEHYDROGENATION ;  HYDROGEN-PRODUCTION ;  PLATINUM CATALYSTS ;  NI-AL2O3 CATALYST ;  METHANE ;  STORAGE ;  TRANSESTERIFICATION ;  PERFORMANCE
语种: 英语
WOS记录号: WOS:000288925400015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142548
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, Lab Appl Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Yu, Jiafeng,Ge, Qingjie,Fang, Wen,et al. Influences of calcination temperature on the efficiency of CaO promotion over CaO modified Pt/gamma-Al2O3 catalyst[J]. APPLIED CATALYSIS A-GENERAL,2011,395(1-2):114-119.
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