化工进展 ›› 2012, Vol. 31 ›› Issue (01 ): 107-111.

• 工业催化 • 上一篇    下一篇

添加ZrO2的Pd/Al2O3催化剂及其催化蒽醌加氢性能

王  丰1,徐贤伦2   

  1. (1Key Laboratory of Oil and Gas Fine Chemicals of Ministry of Education,Xinjiang University, College of Chemistry and Chemical Engineering of Xinjiang University,Urumqi 830046,Xinjiang,China; 2 State Key Laboratory for Oxo Synthesis and Selective Oxidation,Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences,Lanzhou 730000,Gansu,China)
  • 出版日期:2012-01-05 发布日期:2012-01-25

ZrO2 doped Pd/Al2O3 catalyst and its catalytic performance on anthraquinone hydrogenation

WANG Feng1,XU Xianlun2   

  1. 1新疆大学石油天然气教育部重点实验室,新疆大学化学化工学院,新疆 乌鲁木齐 830046
    2中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃 兰州 730000
  • Online:2012-01-05 Published:2012-01-25

摘要: 以四氯合钯(II)酸(H2PdCl4)为前体,活性氧化铝(Al2O3)为载体,硝酸锆(Zr(NO3)4)为添加组分,采用不同方式的分步浸渍法制备了添加ZrO2的Pd/Al2O3催化剂。考察了制备方法和反应条件对催化剂蒽醌加氢催化性能的影响,发现催化剂活性与制备方法有关。当对添加锆的载体进行适当焙烧,控制Pd负载量为0.3%,还原温度低于300 ℃时,催化剂的蒽醌加氢活性较高,与未添加ZrO2的催化剂相比提高了约20%。X射线衍射(XRD)、氮气物理吸附(BET)、透射电镜(TEM)、X光电子能谱(XPS)和程序升温还原(TPR)等表征对催化剂物相结构、比表面积、表面形貌及组分间相互作用的分析表明,ZrO2的掺杂提高了载体Al2O3的高温稳定性,改善了催化剂中活性组分Pd与载体间的相互作用,促进了Pd在载体表面的分散,从而提高了催化活性。

关键词: 氧化锆, Pd/Al2O3催化剂, 蒽醌加氢

Abstract: ZrO2 doped Pd/Al2O3 catalyst,in which H2PdCl4 and Zr(NO3)4 were used as a precursor and an added component respectively,was prepared. Different two step impregnation methods were used for catalyst preparation,and its catalytic activity on anthraquinone hydrogenation was investigated in different reaction conditions. It was found that the catalytic activity was influenced by the preparation methods. When the support with ZrO2 was calcinated appropriately,the load of Pd was 0.3% and reduction temperature was blow 300 ℃,the catalyst activity is about 20% higher than that of catalyst without ZrO2. The structure,specific surface area,surface topography and interaction in the components of catalyst were analyzed by X-ray diffraction(XRD),BET surface area,X ray photoelectron spectroscopy(XPS),transmission electron microscopy(TEM),and temperature-programmed reduction(TPR) respectively. The promotion of catalytic properties is attributed to the ZrO2 which could enhance the heat stability of Al2O3,improve the interaction in the components and make Pd diffused on the surface of catalyst.

Key words: ZrO2, Pd/Al2O3 catalyst, anthraquinone hydrogenation