The Unique Role of CaO in Stabilizing the Pt/Al2O3 Catalyst for the Dehydrogenation of Cyclohexane

	The Unique Role of CaO in Stabilizing the Pt/Al2O3 Catalyst for the Dehydrogenation of Cyclohexane
	Yu, Jiafeng 1,3; Wang, Rui 2; Ren, Shiyuan 2; Sun, Xiaoyan 2,3; Chen, Chunlin 2; Ge, Qingjie 1; Fang, Wen 1,3; Zhang, Jian 2; Xu, Hengyong 1; Su, Dang Sheng 2
刊名	chemcatchem
	2012-09-01
卷号	4 期号:9 页码:1376-1381
关键词	calcium coke dehydrogenation heterogeneous catalysis platinum
英文摘要	coke-induced deactivation is one of the major challenges in the field of heterogeneous catalysis. herein, the performance of the pt/al2o3 catalyst for the hydrogen-free dehydrogenation of cyclohexane was improved by doping with a small amount of ca. the ca-modified pt/al2o3 catalyst exhibited a cyclohexane conversion of 97.0?% and maintained a conversion above 75?% after 48 h, whilst the unmodified catalyst was deactivated from 87.0 to 2.7?% under the same conditions. characterization techniques, including in situ drift, xps, thermal analysis, and temperature-programmed techniques, revealed that the presence of ca effectively suppressed the deep dehydrogenation of h-rich carbonaceous components and promoted coke desorption by increasing the h/c ratio of h-deficient coke. this promotion effect of ca was also associated with neutralizing the residual cl ions and promoting immediate dehydrogenation.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, physical
研究领域[WOS]	chemistry
关键词[WOS]	transform infrared-spectroscopy ; pt/gamma-al2o3 catalyst ; alkane dehydrogenation ; coke characterization ; platinum ; xps ; adsorption ; metal ; methylcyclohexane ; isomerization
收录类别	SCI
语种	英语
WOS记录号	WOS:000308037400022
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/143142]
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, Dept State Key Lab Catalysis Inst, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Yu, Jiafeng,Wang, Rui,Ren, Shiyuan,et al. The Unique Role of CaO in Stabilizing the Pt/Al2O3 Catalyst for the Dehydrogenation of Cyclohexane[J]. chemcatchem,2012,4(9):1376-1381.
APA	Yu, Jiafeng.,Wang, Rui.,Ren, Shiyuan.,Sun, Xiaoyan.,Chen, Chunlin.,...&Su, Dang Sheng.(2012).The Unique Role of CaO in Stabilizing the Pt/Al2O3 Catalyst for the Dehydrogenation of Cyclohexane.chemcatchem,4(9),1376-1381.
MLA	Yu, Jiafeng,et al."The Unique Role of CaO in Stabilizing the Pt/Al2O3 Catalyst for the Dehydrogenation of Cyclohexane".chemcatchem 4.9(2012):1376-1381.