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题名: Dehydrogenation of ethylbenzene to styrene with CO(2) over iron oxide-based catalysts
作者: Ji, Min1;  Chen, Guili1;  Wang, Junhu2;  Wang, Xinkui1;  Zhang, Tao2
关键词: Ethylbenzene ;  Oxidative dehydrogenation ;  Carbon dioxide ;  Iron oxide-based catalysts
刊名: CATALYSIS TODAY
发表日期: 2010-12-22
DOI: 10.1016/j.cattod.2010.07.014
卷: 158, 期:3-4, 页:464-469
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: This paper describes dehydrogenation reaction of ethylbenzene to styrene with CO(2) over iron oxide-based catalysts. Three catalysts of Fe(2)O(3)-MgO/gamma-Al(2)O(3), Fe(2)O(3)/MgAl(2)O(4) and MgFe(0.1)Al(1.9)O(4) with the same molar ratio of Mg/Fe/Al were prepared by impregnation and sol-gel methods. At 580 degrees C, the ethylbenzene conversion over MgFe(0.1)Al(1.9)O(4) kept a value of 40% during the time on stream of 20 h, whereas that over Fe(2)O(3)/MgAl(2)O(4) decreased rapidly from initial 50.0% to 27.4%. The properties of the catalysts were characterized by several techniques such as N(2) adsorption/desorption, X-ray diffraction, thermogravimetry, energy dispersive X-ray spectroscopy, Fourier transform-infrared spectroscopy, (57)Fe Mossbauer spectroscopy, temperature-programmed reduction, and temperature-programmed desorption of NH(3) and CO(2). It was found that the iron species of these catalysts are different. In MgFe(0.1)Al(1.9)O(4), all Fe(3+) species are incorporated in the spinel lattice. MgFe(0.1)Al(1.9)O(4) shows high catalytic activity and stability in ethylbenzene dehydrogenation reaction with CO(2). Moreover, the weak surface acidity of MgFe(0.1)Al(1.9)O(4) prevents from the carbon formation during the reaction. (C) 2010 Elsevier B.V. All rights reserved.
关键词[WOS]: CARBON-DIOXIDE ;  OXIDATIVE DEHYDROGENATION ;  MOSSBAUER-SPECTROSCOPY ;  FE2O3/AL2O3 CATALYSTS ;  HYDROTALCITE ;  MGAL2O4 ;  PRECURSORS ;  REDUCTION ;  BEHAVIOR ;  POWDERS
语种: 英语
WOS记录号: WOS:000284583300043
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142258
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.Dalian Univ Technol, Sch Chem Engn, Dept Chem, Dalian 116012, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Ji, Min,Chen, Guili,Wang, Junhu,et al. Dehydrogenation of ethylbenzene to styrene with CO(2) over iron oxide-based catalysts[J]. CATALYSIS TODAY,2010,158(3-4):464-469.
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