| 王 丰,王吉德,徐贤伦.化学通报,2014,77(5):441-445. |
| Mn修饰Al2O3载体负载Pd催化剂及其蒽醌加氢催化性能 |
| Pd supported on Mn promoted Al2O3 catalyst and its catalytic performance for Anthraquinone hydrogenation |
| 投稿时间：2014-01-12 修订日期：2014-01-20 |
| DOI： |
| 中文关键词: 催化剂 锰 Al2O3载体 Pd 蒽醌加氢 |
| 英文关键词:catalyst Mn Al2O3support Pd anthraquinone hydrogenation |
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| 中文摘要: |
| 以活性氧化铝（γ-Al2O3）为载体，分别以Mn(NO3)2溶液和酸性氯化钯（PdCl2）溶液为修饰组分和活性组分前体，采用分步浸渍法制备了锰（Mn）修饰Al2O3载体负载钯催化剂（PMA）。将催化剂应用于蒽醌加氢反应，考察了催化剂制备方法、活性组分负载量和催化剂还原温度对反应效果的影响。用X射线衍射（XRD）、氮气物理吸附（BET）、X光电能谱（XPS）和程序升温还原（TPR）对催化剂进行了表征。结果表明，催化剂活性受到制备方法和Pd负载量的影响，在对Mn修饰Al2O3载体进行焙烧，Pd负载量0.2% (wt), 还原温度300℃的条件下，催化剂蒽醌加氢活性较高，较未修饰的催化剂提高了约16%。催化剂中Mn以MnO的形式存在，影响了γ-Al2O3的组织结构，使载体与活性组分之间的作用力增强，活性组分Pd高度分散在催化剂表面，从而提高了催化剂的活性。 |
| 英文摘要: |
| Using Mn(NO3)2 and PdCl2 as promoter and active component precursor, respectively, adopting two steps impregnation method, Pd supported on Mn promoted Al2O3 catalysts were prepared . The catalytic activity of the catalysts for anthraquinone hydrogenation were tested. The influence of the preparation methods, Pd loading amount, and reducing temperature to the catalysts were investigated. The catalysts were characterized by X-ray diffraction (XRD), BET surface area, X-ray photoelectron spectroscopy (XPS), and temperature-programmed reduction（TPR）. The results show that the activities of the catalysts are affected by the preparation methods and Pd loading amount. When calcinating the promoted support, Pd content of 0.2% (wt) and reducing at 300℃, the catalyst exhibits a superior activity and is about 16 % higher than that of non Mn promoted catalyst. Mn in the catalyst exists in the form of MnO. The higher activity is attributed to the promotion effect of Mn which could affect the organizational structure of the γ-Al2O3, enhance interaction between support and active component and the high distribution of the active component. |
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