Influences of calcination temperature on the efficiency of CaO promotion over CaO modified Pt/gamma-Al2O3 catalyst

	Influences of calcination temperature on the efficiency of CaO promotion over CaO modified Pt/gamma-Al2O3 catalyst
	Yu, Jiafeng 1,2; Ge, Qingjie 1; Fang, Wen 1,2; Xu, Hengyong 1,3
刊名	applied catalysis a-general
	2011-03-15
卷号	395 期号:1-2 页码:114-119
关键词	CaO promotion effect Calcination temperature Pt/gamma-Al2O3 catalyst CaO particle size Ca-Al interaction
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.
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
关键词[WOS]	basic catalysts ; propane dehydrogenation ; alkane dehydrogenation ; hydrogen-production ; platinum catalysts ; ni-al2o3 catalyst ; methane ; storage ; transesterification ; performance
收录类别	SCI
语种	英语
WOS记录号	WOS:000288925400015
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/142548]
专题	大连化学物理研究所_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, 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
推荐引用方式 GB/T 7714	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.
APA	Yu, Jiafeng,Ge, Qingjie,Fang, Wen,&Xu, Hengyong.(2011).Influences of calcination temperature on the efficiency of CaO promotion over CaO modified Pt/gamma-Al2O3 catalyst.applied catalysis a-general,395(1-2),114-119.
MLA	Yu, Jiafeng,et al."Influences of calcination temperature on the efficiency of CaO promotion over CaO modified Pt/gamma-Al2O3 catalyst".applied catalysis a-general 395.1-2(2011):114-119.