氧化铝负载氮化钼的表面性质及加氢脱氢性能  

Surface Properties and Hydrogenation/Dehydrogenation Performance of Alumina-Supported Molybdenum Nitride

作　　者：肖进兵[1,2] 罗有训[1] 罗根祥[1] 孙兆林[1] 辛勤[3] 李灿[3] 

机构地区：[1]抚顺石油学院石油化工分院 [2]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 [3]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：《催化学报》2001年第6期571-574,共4页

摘　　要：研究了氧化铝负载氮化钼的表面性质及加氢脱氢性能 .结果表明 :负载型氮化钼处于高度分散状态 ,钝化态氮化钼表面为氮氧化钼或氧修饰的氮化钼 ,与真正的氮化钼有很大的区别 ;在苯、环己烯和环己烷的转化反应中 ,氮化钼对苯无加氢活性 ,但对环己烯和环己烷具有很高的脱氢活性和一定的裂化活性 ;钝化态氮化钼具有一定的苯加氢活性和环己烷裂化活性 .实验结果表明 ,氮化钼的加氢 /脱氢活性中心为钼 ,裂化活性中心与氮原子有关 .同时 ,还考察了Ni(Co)The surface properties and hydrogenation/dehydrogenation performance of Mo2N/gamma -Al2O3 were studied. It was showed that the supported molybdenum nitride was highly dispersed, and that the surface species of passivated molybdenum nitride was molybdenum oxynitride or molybdenum nitride modified by oxygen, which was very different from fresh molybdenum nitride. The molybdenum nitride was not active for C6H6 hydrogenation, but highly active for dehydrogenation of cyclohexene/cyclohexane and cracking of cyclohexane. The passivated molybdenum nitride was active for C6H6 hydrogenation and more active for C6H6 cracking than molybdenum nitride and H-2-reduced molybdenum oxide. All results showed that the hydrogenation/dehydrogenation sites are Mo and the cracking sites are related to N atom. The catalytic performance of Ni(Co)Mo/gamma -Al2O3 for cracking of benzene and cyclohexane were also studied.

关 键 词：氮化物 氧化铝 苯 环已烯 环已烷 加氢 脱氢 裂化 负载型催化剂 催化性能 表面性质 

分 类 号：O643.3[理学—物理化学]