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首页> 外文期刊>Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications >The effect of copper on benzene hydrogenation to cyclohexane over Ni/Al2O3 catalyst
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The effect of copper on benzene hydrogenation to cyclohexane over Ni/Al2O3 catalyst

机译：Ni / Al2O3催化剂上铜对苯加氢制环己烷的影响

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摘要

The effect of a copper modifier on physicochemical properties of coprecipitated precursors and final Ni-Cu/Al2O3 catalysts for benzene to cyclohexane hydrogenation was investigated. Based on the studies of physicochemical properties, the influence of copper on the catalytic activity and selectivity of Ni-Cu/Al2O3 systems was discussed. The addition of copper resulted in a decrease of the specific and nickel surface area, improvement of the selectivity and a slight decrease of the benzene hydrogenation activity compared to the reference catalyst. A decrease of methylcyclopentane and methylcyclohexane by-products formation on the surface of Ni-Cu/Al2O3 catalyst containing 10-17 wt% CuO by, respectively, 70% and 10% was observed. The results reveal a distinct, beneficial effect of the Ni/Al2O3 modification by copper on the catalyst selectivity. However, this effect depends on temperature and is limited to ca. 20 wt% CuO, above this content the activity was found to decrease considerably. (C) 2016 Elsevier B.V. All rights reserved.
机译：研究了铜改性剂对共沉淀前体和最终Ni-Cu / Al2O3催化剂用于苯到环己烷加氢的物理化学性质的影响。在理化性质研究的基础上，探讨了铜对Ni-Cu / Al2O3体系催化活性和选择性的影响。与参考催化剂相比，铜的添加导致比表面积和镍表面积的减少，选择性的改善以及苯氢化活性的轻微降低。观察到在含有10-17 wt％CuO的Ni-Cu / Al2O3催化剂表面上分别减少了70％和10％的甲基环戊烷和甲基环己烷副产物形成。结果表明，铜对Ni / Al2O3的修饰对催化剂的选择性具有明显的有益作用。但是，这种影响取决于温度，并且仅限于约200℃。 20wt％CuO，超过该含量，发现活性显着降低。 （C）2016 Elsevier B.V.保留所有权利。

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