Ru/SBA-15 catalysts for partial hydrogenation of benzene to cyclohexene: Tuning the Ru crystallite size by Ba

Ru/SBA-15 catalysts for partial hydrogenation of benzene to cyclohexene: Tuning the Ru crystallite size by Ba
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用于苯部分加氢制环己烯的 Ru/SBA-15 催化剂:通过 Ba 调节 Ru 晶粒尺寸

DOI:
10.1016/j.catcom.2008.07.024
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发表时间:
2008-09
影响因子:
3.7
通讯作者:
Liu, Jian-Liang
Liu, Jian-Liang
中科院分区:
化学3区
文献类型:
--
作者:
Fan, Kang-Nian;Zhuang, Ji-Hua;Qiao, Ming-Hua;Bu, Juan;He, He-Yong;Yan, Shi-Run;Chen, Xue-Ying;Liu, Jian-Liang

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采用“双溶剂”法制备了不同Ba/Ru摩尔比的Ru-Ba/SBA-15催化剂,该催化剂可以很容易地将活性组份引入到SBA-15分子筛的孔道中。表征结果表明,当Ba/Ru比从0.1增加到1.0时,Ru的微晶尺寸从3.6 nm平滑地调整到7.5 nm。在苯的液相加氢反应中,在Ru微晶尺寸为5.6 nm的Ru-BA/SBA-15催化剂上,环己烯的产率最高,这解释为该催化剂上存在最多有利于环己烯生成的活性中心。
Ru–Ba/SBA-15 catalysts with different Ba/Ru molar ratios were prepared by the ‘two solvents’ method, which can readily introduce the active components into the channels of SBA-15. Characterizations revealed that the crystallite size of Ru was tuned smoothly from 3.6 to 7.5nm by increasing the Ba/Ru ratio from 0.1 to 1.0. In liquid phase hydrogenation of benzene, the maximum yield of cyclohexene was obtained on the Ru–Ba/SBA-15 catalyst with Ru crystallite size of 5.6nm, which is interpreted as the presence of the highest population of the active sites favorable for the production of cyclohexene on such Ru crystallites.
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