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题名: Dehydrogenation of n-dodecane over Pt-Sn/Mg-Al-O catalysts: Investigating the catalyst performance while monitoring the products
作者: Lai, Yulong1, 2;  He, Songbo1;  Li, Xianru1, 2;  Sun, Chenglin1;  Seshan, K.3
关键词: Dehydrogenation ;  Long chain paraffin ;  Pt-Sn ;  Mg-Al-O oxide ;  In situ ;  TOF-MS
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2014-01-17
DOI: 10.1016/j.apcata.2013.09.042
卷: 469, 页:74-80
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: n-Dodecane was dehydrogenated over Pt-Sn/Mg-Al-O catalysts. Al2O3 and Mg Al-O supports with different Mg/AI mole ratio were prepared using a chemical co-precipitation method. The supports and supported Pt Sn catalysts were characterized using BET, XRD, CO-chemisorption, NH3-TPD, and TG. The dehydrogenation products were analyzed by GC. A single photon ionization time-of-flight mass spectrometer (SPI-TOF-MS) was developed and used to monitor the dehydrogenation products on-line during continuous reactions. Adding Mg to the supports decreased the specific surface area, increased the pore volume and diameter, moderated the acidity, and changed the strong acidic sites to weak ones. The dehydrogenation activity of the catalysts was inhibited, while the mono-olefin selectivity and yield were enhanced by Mg addition. Using a 1/3 Mg/A1 molar ratio generated the optimal n-dodecene yield over the Pt Sn/Mg Al-O catalysts. The TOF-MS was reliable for detecting the dehydrogenation products of the long-chain paraffins rapidly, continuously, and accurately. Interestingly, TOF-MS can be used to monitor the reactions on-line and in situ, providing analyses of the products during high temperature reactions. (C) 2013 Elsevier B.V. All rights reserved.
关键词[WOS]: MAL2O4 M-MG ;  ISOBUTANE DEHYDROGENATION ;  BUTANE DEHYDROGENATION ;  PT-SN/AL2O3 CATALYSTS ;  METAL PRECURSORS ;  REGENERATION ;  PARAFFINS ;  SELECTIVITY ;  SUPPORT ;  LITHIUM
语种: 英语
WOS记录号: WOS:000329266500008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143203
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, Dalian Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

Recommended Citation:
Lai, Yulong,He, Songbo,Li, Xianru,et al. Dehydrogenation of n-dodecane over Pt-Sn/Mg-Al-O catalysts: Investigating the catalyst performance while monitoring the products[J]. APPLIED CATALYSIS A-GENERAL,2014,469:74-80.
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