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题名: Effect of K Promoter on the Performance of Pt-Sn-K/gamma-Al2O3 Catalyst for n-Hexadecane Dehydrogenation
作者: He Songbo1;  Lai Yulong1;  Bi Wenjun1;  Yang Xu1;  Rong Xin1;  Sun Chenglin1
关键词: platinum ;  tin ;  alkali metal ;  long-chain paraffin ;  dehydrogenation ;  acidity ;  coking
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2010-04-01
DOI: 10.3724/SP.J.1088.2010.90946
卷: 31, 期:4, 页:435-440
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
英文摘要: A Pt-Sn-K/gamma-Al2O3 catalyst was prepared by complex impregnation under vacuum. The effect of the K promoter on the catalytic properties of the Pt-Sn-K/gamma-Al2O3 catalyst for the dehydrogenation of long-chain paraffins to mono-olefins was investigated using n-hexadecane dehydrogenation as a test reaction. The catalyst was characterized by infrared spectroscopy of pyridine adsorption, CO pulse chemisorption, temperature-programmed reduction with H-2, thermogravimetric analysis, and temperature-programmed oxidation with O-2. The results show that the addition of K decreases the interaction of SnOx and Al2O3, promotes the reduction of SnOx species, and suppresses the catalyst activity for dehydrogenation. The K promoter also neutralizes the acidity and decreases the amount of strong acidic centers of the catalyst. Thus, the side reactions on the catalyst are inhibited, and the selectivity for monoolefins is increased. The stability of the catalyst is slightly enhanced with the addition of K because of the increased resistance to coke formation on the catalyst. However, the synergistic effect of active sites and acidic sites is weakened by the excess addition of the K promoter, which results in a great decrease in the activity and a low stability of the catalyst.
关键词[WOS]: CHAIN PARAFFIN DEHYDROGENATION ;  PT-SN CATALYSTS ;  ISOBUTANE DEHYDROGENATION ;  PT-SN/AL2O3 CATALYSTS ;  METAL PRECURSORS ;  POTASSIUM ;  BEHAVIOR ;  SUPPORT ;  LITHIUM ;  LI
语种: 英语
WOS记录号: WOS:000278046900013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141721
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, Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
He Songbo,Lai Yulong,Bi Wenjun,et al. Effect of K Promoter on the Performance of Pt-Sn-K/gamma-Al2O3 Catalyst for n-Hexadecane Dehydrogenation[J]. CHINESE JOURNAL OF CATALYSIS,2010,31(4):435-440.
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