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Citation: Yanhu Cheng, Fan Zhang, Yi Zhang, Changxi Miao, Weiming Hua, Yinghong Yue, Zi Gao. Oxidative dehydrogenation of ethane with CO₂ over Cr supported on submicron ZSM-5 zeolite[J]. Chinese Journal of Catalysis, ;2015, 36(8): 1242-1248. doi: 10.1016/S1872-2067(15)60893-2 shu

Oxidative dehydrogenation of ethane with CO₂ over Cr supported on submicron ZSM-5 zeolite

Yanhu Cheng ^a ,
Fan Zhang ^a ,
Yi Zhang ^a ,
Changxi Miao ^b ,
Weiming Hua ^a ,
Yinghong Yue ^a,, ,
Zi Gao ^a

1.
a Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China;

Corresponding author: Yinghong Yue,
Received Date: 28 January 2015
Available Online: 11 May 2015
Fund Project: 国家自然科学基金(20773027, 20773028和21273043) (20773027, 20773028和21273043) 上海市科学技术委员会(08DZ2270500). (08DZ2270500)

A series of submicron ZSM-5-supported chromium oxide catalysts were prepared and characterized by XRD, N₂ adsorption, ²⁷Al MAS NMR, SEM, XPS, laser Raman spectroscopy and diffuse reflectance UV-Vis spectroscopy. The catalytic performance of these materials during ethane dehydrogenation in the presence of CO₂ was investigated. The catalysts exhibited both high activity and stability, with an ethane conversion of ~65% and ethylene yield of ~49% without any obvious deactivation following 50 h. Characterization results show that the excellent catalytic performance results from the high degree of dispersion of CrO_x species on the submicron ZSM-5 surface. Both a high Si/Al ratio and the use of the Na-form of the ZSM-5 support were found to favor CrO_x dispersion. The promotional effect of CO₂ on the dehydrogenation reaction was quite evident and can be attributed to the reverse water-gas shift reaction.
- Dehydrogenation,
- Ethane,
- ZSM-5 zeolite,
- Submicron,
- Carbon dioxide
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Oxidative dehydrogenation of ethane with CO₂ over Cr supported on submicron ZSM-5 zeolite