高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (10): 1645.

• 论文 • 上一篇    下一篇

负载型钴-钼氮化物的制备及吡啶加氢脱氮活性的研究

齐兴义, 熊光, 杨树武, 辛勤   

  1. 中国科学院大连化学物理研究所, 催化基础国家重点实验室, 大连, 116023
  • 收稿日期:1997-09-09 出版日期:1998-10-24 发布日期:1998-10-24
  • 通讯作者: 辛 勤.
  • 作者简介:齐兴义,男,41岁,博士后.
  • 基金资助:

    国家自然科学基金(批准号:29673043)资助课题.

Studies on Preparation of Supported Cobalt-molybdenum Nitrides and Their Catalytic Behaviour for Pyridine HDN

QI Xing-Yi, XIONG Guang, YANG Shu-Wu, XIN Qin   

  1. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023
  • Received:1997-09-09 Online:1998-10-24 Published:1998-10-24

摘要: 以钼磷酸+硝酸钴、仲钼酸铵+硝酸钴、仲钼酸铵为前体活性相组元及γ-Al2O3为载体,制备了负载型双(单)组元过渡金属氮化物[(CoMoN-(Ⅰ,Ⅱ,Ⅲ),MoN-Ⅳ],并利用BET、XPS、H2-TPD及Raman等手段进行了表征;以正己烷+环己烷+吡啶为模型底物考察了上述催化剂的吡啶加氢脱氮活性.与CoMoN-Ⅱ、CoMoN-Ⅲ和MoN-Ⅳ相比,CoMoN-Ⅰ具有较高的吡啶加氢脱氮活性.

关键词: 氮化物, 12-钼磷酸, &gamma, -Al2O3, 吡啶, 加氢脱氮

Abstract: γ Alumina supported bi(mono)metallic transition metal nitrides were prepared respectively with 12 phosphomolybdic acid plus cobalt nitrate(denoted as CoMoN-Ⅰ and CoMoN-Ⅱ related with the precursor of the nitride, CoMoN-Ⅰ, calcined at 773 Kfor 6 h before nitriding), ammonium heptamolybdate plus cobalt nitrate(denoted as CoMoN-Ⅲ), and only ammonium heptamolybdate(denoted as MoN-Ⅳ) as the precursor active phases, using temperature programmed reduction with NH3, and characterized with BET, XRD, XPS, H2-TPDand Raman. Pyridine was selected as a model substrate in order to evaluate the HDNcatalytic activity of nitrides synthesized above. It was found that CoMoN-Ⅰ possesses conspicuously high pyridine HDNactivity as compared to that of CoMoN-Ⅱ, CoMoN-Ⅲ and MoN-Ⅳ.

Key words: Nitride, 12-Phosphomolybdic acid, γ-Alumina, Pyridine, Hydrodenitrogenation

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