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镧助剂对Fe/ZrO2催化剂结构及F-T反应性能的影响
引用本文:陈开东,颜其洁.镧助剂对Fe/ZrO2催化剂结构及F-T反应性能的影响[J].催化学报,1997,18(3):199-202.
作者姓名:陈开东  颜其洁
作者单位:南京大学化学系
摘    要:用XRD,Mossbauer谱,TPR,CO-TPD和CO加氢反应性能测试等手段研究了镧助剂对Fe/ZrO2催化剂结构及F-T合成催化剂性能的影响。结果表明,不同的制备方法明显影响催化剂的结构及反应的性能,镧助剂以La2O3形式存在时,催化剂上甲烷选择降低,烯烃选择性提高;镧助剂以LaFeO3形式存在时,催化剂的催化活性大大提高,但同时甲烷选择性上升,烯烃选择性下降。

关 键 词:助剂  Fe  F-T合成  氧化物  CO  加氢  CO加氢
收稿时间:1997-06-25

INFLUENCE OF LANTHANUM ON THE STRUCTURE AND CATALYTIC PERFORMANCE OF Fe/ZrO 2 CATALYSTS FOR CO HYDROGENATION
Chen Kaidong,Yan Qijie.INFLUENCE OF LANTHANUM ON THE STRUCTURE AND CATALYTIC PERFORMANCE OF Fe/ZrO 2 CATALYSTS FOR CO HYDROGENATION[J].Chinese Journal of Catalysis,1997,18(3):199-202.
Authors:Chen Kaidong  Yan Qijie
Abstract:La promoted Fe/ZrO 2 catalysts were prepared by different impregnation methods. The structure, reduction behavior, CO desorption behavior and catalytic performance of the catalysts were studied by XRD, Mssbauer spectroscopy, TPR, CO TPD and CO hydrogenation. It is shown that the impregnation sequence seriously affects the characteristic of the catalysts. For Fe La samples prepared by co impregnation method, perovskite type LaFeO 3 phase was formed in the preparation process. For Fe/La sample prepared by sequential impregnation method, La 3+ cations formed La 2O 3. CO hydrogenation results show that the catalytic activity is much higher when lanthanum promoter exists in perovskite type LaFeO 3 state than in La 2O 3 state.
Keywords:Iron oxide  Zirconia  Supported catalyst  Lanthanum  Promoter  Structure  Carbon monoxide  Hydrogenation  
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