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题名: Light alkenes preparation by the gas phase oxidative cracking or catalytic oxidative cracking of high hydrocarbons
作者: Liu, XB;  Li, WZ;  Zhu, H;  Ge, QJ;  Chen, YX;  Xu, HY
关键词: light alkenes ;  gas phase oxidative cracking ;  catalytic oxidative cracking ;  high hydrocarbons ;  hydrogen addition
刊名: CATALYSIS LETTERS
发表日期: 2004-04-01
卷: 94, 期:1-2, 页:31-36
收录类别: SCI
文章类型: Article
项目归属: 801
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The preparation of light alkenes by the gas phase oxidative cracking (GOC) or catalytic oxidative cracking (COC) of model high hydrocarbons ( hexane, cyclohexane, isooctane and decane in the GOC process and hexane in the COC process) was investigated in this paper. The selection for the feed in the GOC process was flexible. Excellent conversion of hydrocarbons ( over 85%) and high yield of light alkenes ( about 50%) were obtained in the GOC of various hydrocarbons including cyclohexane at 750 degreesC. In the GOC process, the utilization ratio of the carbon resources was high; CO dominated the produced COX (the selectivity to CO2 was always below 1%); and the total selectivity to light alkenes and CO was near or over 70%. In the COC of hexane over three typical catalysts (HZSM-5, 10% La2O3/HZSM-5 and 0.25% Li/MgO), the selectivity to COX was hard to decrease and the conversion of hexane and yield of light alkenes could not compete with those in the GOC process. With the addition of H-2 in the feed, the selectivity to COX was reduced below 5% over 0.1% Pt/HZSM-5 or 0.1% Pt/MgAl2O4 catalyst. The latter catalyst was superior to the former catalyst due to its perfect performance at high temperature, and with the latter, excellent selectivity to light alkenes ( 70%) and the conversion of hexane (92%) were achieved at 850 degreesC ( a yield of light alkenes of 64%, correspondingly).
关键词[WOS]: HETEROGENEOUS CONTRIBUTIONS ;  OXIDE CATALYSTS ;  DEHYDROGENATION ;  ETHANE ;  ETHYLENE ;  PROPANE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000220217400006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/80963
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 116023, Peoples R China

Recommended Citation:
Liu, XB,Li, WZ,Zhu, H,et al. Light alkenes preparation by the gas phase oxidative cracking or catalytic oxidative cracking of high hydrocarbons[J]. CATALYSIS LETTERS,2004,94(1-2):31-36.
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