负载型钴-钼氮化物的制备及吡啶加氢脱氮活性的研究  

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

作　　者：齐兴义[1] 熊光[1] 杨树武[1] 辛勤[1] 

机构地区：[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

出　　处：《高等学校化学学报》1998年第10期1645-1649,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

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．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 K for 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 NH 3, and characterized with BET, XRD, XPS, H 2 TPD and Raman. Pyridine was selected as a model substrate in order to evaluate the HDN catalytic activity of nitrides synthesized above. It was found that CoMoN Ⅰ possesses conspicuously high pyridine HDN activity as compared to that of CoMoN Ⅱ, CoMoN Ⅲ and MoN Ⅳ.

关 键 词：氮化物 钼磷酸 吡啶 加氢脱氮 催化剂 钴 

分 类 号：O643.36[理学—物理化学] O614.812[理学—化学]