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首页> 外文期刊>Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications >Selective hydrogenation of benzene to cyclohexene using a Ru catalyst suspended in an aqueous solution in a mechanically agitated tetraphase reactor: a study of the influence of the catalyst preparation on the hydrogenation kinetics of benzene and of
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Selective hydrogenation of benzene to cyclohexene using a Ru catalyst suspended in an aqueous solution in a mechanically agitated tetraphase reactor: a study of the influence of the catalyst preparation on the hydrogenation kinetics of benzene and of

机译：在机械搅拌的四相反应器中使用悬浮在水溶液中的Ru催化剂将苯选择性加氢成环己烯：研究催化剂制备对苯和苯酚加氢动力学的影响。

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The reactivity of Ru based catalysts in the benzene selective hydrogenation to cyclohexene has been studied. The reaction has been carried out in a tetraphase slurry reactor at 423 K, at 5 MPa of pressure, in the presence of two liquid phases: benzene and an aqueous solution of 0.6 mol l(-1) ZnSO4. A detailed kinetic measurement has been carried out in order to study the influence of the preparation procedure and of the treatments on the catalyst activity and selectivity. Moreover, a comparison of benzene and cyclohexene hydrogenation kinetics is presented in order to evaluate the influence of the treatments carried out on the unreduced catalyst on the activity, selectivity and yield to cyclohexene. The kinetics of benzene hydrogenation indicates that the catalyst activity is influenced by the time, during which it remains in the mixture of precipitation for its preparation. The longer the time, the lower the activity is. Selectivity and yield remain practically unaffected after 18 h of permanence in the mixture of precipitation. Treatment of the unreduced catalyst with water depresses both activity and selectivity, while treatment with 1 mol l(-1) NaOH gives the best results. On the contrary, in the hydrogenation of cyclohexene, the NaOH treated catalyst is three times less active than the catalyst treated with water. These results are in agreement with the higher selectivity achieved using NaOH treated catalysts. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 26]
机译：研究了Ru基催化剂在苯选择性加氢中对环己烯的反应性。该反应已经在四相淤浆反应器中在423 K，5 MPa的压力，两种液相存在下进行：苯和0.6 mol l（-1）ZnSO4水溶液。为了研究制备方法和处理对催化剂活性和选择性的影响，进行了详细的动力学测量。此外，对苯和环己烯的氢化动力学进行了比较，以评估在未还原的催化剂上进行的处理对环己烯的活性，选择性和收率的影响。苯加氢的动力学表明，催化剂活性受时间的影响，在此期间，催化剂保留在沉淀混合物中以进行制备。时间越长，活动性越低。在沉淀混合物中永久存在18小时后，选择性和收率几乎不受影响。用水处理未还原的催化剂会降低活性和选择性，而用1 mol l（-1）NaOH处理会得到最佳结果。相反，在环己烯的氢化中，NaOH处理的催化剂的活性比用水处理的催化剂低三倍。这些结果与使用NaOH处理的催化剂获得的更高的选择性一致。 （C）2001 Elsevier Science B.V.保留所有权利。 [参考：26]

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