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Citation: SUN Haijie, CHEN Lingxia, LI Shuaihui, ZHANG Yuanxin, LIU Shouchang, LIU Zhongyi, REN Baozeng. Effect of Y₂O₃-Doped ZrO₂ on the Catalytic Performance of Ru-La-B/ZrO₂ for Selective Hydrogenation of Benzene to Cyclohexene[J]. Chinese Journal of Applied Chemistry, ;2014, 31(11): 1317-1322. doi: 10.3724/SP.J.1095.2014.40022 shu

Effect of Y₂O₃-Doped ZrO₂ on the Catalytic Performance of Ru-La-B/ZrO₂ for Selective Hydrogenation of Benzene to Cyclohexene

1.
a College of Chemistry and Molecular Engnineering, Zhengzhou University, Zhengzhou 450001, China;
2.
b Institute of Environmental and Catalytic Engineering, Department of Chemistry, Zhengzhou Normal University, Zhengzhou 450044, China;
3.
c School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China

Corresponding author: LIU Zhongyi,
Received Date: 20 January 2014
Available Online: 20 January 2014
Fund Project: 国家自然科学基金资助项目(21273205,U1304204) (21273205,U1304204)国家科技型中小企业创新基金(10C26214104505) (10C26214104505)河南省博士后科研项目资助(2013006) (2013006)

The nano-scale pure ZrO₂ and the Y₂O₃-doped ZrO₂(ZrO₂-Y) were prepared by the hydrothermal synthesis method,and investigated as supports of Ru-La-B/ZrO₂ catalysts.It was confirmed that both of them have similar crystallite size,texture property and particle size distribution.ZrO₂ only has a monoclinic phase.ZrO₂-Y not only has a monoclinic phase,but also some of the tetragonal phase.Y₂O₃ doping can affect the composition and the phase structure of ZrO₂.The Y₂O₃ doping can cover some of the active sites which are unsuitable for the formation of cyclohexene.Thus the activity of the catalyst supported on ZrO₂-Y is lower than that of catalyst supported on ZrO₂,and the selectivity to cyclohexene of the former is higher than that of the latter at low benzene conversion.The Ru-La-B catalysts supported on ZrO₂-Y has a poorer hydrophilicity than that supported on ZrO₂ due to the lower content of the surface hydroxyl groups on the tetragonal phase of ZrO₂-Y.It is difficult for cyclohexne to be desorbed from the surface of the catalyst with ZrO₂-Y as supports.Thus the selectivity to cyclohexene of the catalyst supported on ZrO₂-Y is lower than that supported on ZrO₂ when the benzene conversion exceeds 52.0%.A cyclohexene yield of 52.1% is achieved on the Ru-La-B catalysts supported on ZrO₂ at 20 min,however,only 45.2% is obtained on that supported on ZrO₂-Y.Therefore,the nano-scale monoclinic ZrO₂ is more suitable support of the catalyst for the selective hydrogenation of benzene to cyclohexene.
- benzene,
- selective hydrogenation,
- cyclohexene,
- ZrO₂,
- YM₂O₃ doping
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Effect of Y2O3-Doped ZrO2 on the Catalytic Performance of Ru-La-B/ZrO2 for Selective Hydrogenation of Benzene to Cyclohexene

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通讯作者: 陈斌, bchen63@163.com

Effect of Y₂O₃-Doped ZrO₂ on the Catalytic Performance of Ru-La-B/ZrO₂ for Selective Hydrogenation of Benzene to Cyclohexene