作　　者： ; ; ;

机构地区： 广州大学化学化工学院

出　　处： 《天然气化工—C1化学与化工》 2011年第3期1-4,共4页

摘　　要： 采用等体积浸渍法结合程序升温还原技术制备了一系列碳纳米管负载的钴钼氮化物催化剂,考察了氮化空速、氮化气比例等制备条件对其催化性能的影响;结合XRD、BET、元素分析等表征手段,研究了催化剂的物化性能。研究结果表明:在XRD图谱中出现了Co3Mo3N的微弱衍射峰;元素分析结果表明催化剂结构中的确有N元素的引入;氮化空速、氮化气比例对催化剂的性能有较大影响,当氮化空速为10000h-1,氢氮体积比为5∶1,反应温度为600℃时,Co3Mo3N/CNTs催化剂的活性最好,氨分解率达到98.72%。 A series of nitrides of cobalt and molybdenum supported on carbon nanotubes were prepared by incipient wet impregnation and temperature programmed reduction methods,and the effects of the preparation conditions on their catalytic behaviors for ammonia decomposition were investigated.The catalysts were characterized by XRD,BET and EA.The results showed that the Co-Mo bimetallic nitride species in the materials appeared to be crystallized,which was proofed by the corresponding XRD peaks,and the element N was really introduced into the catalysts which was observed from the results of EA.The nitriding gas space velocity and the H2/N2 ratio of nitriding gas for preparation of catalysts had great effects on the performances of the catalysts,and the Co3Mo3N/CNTs catalyst prepared by using the nitriding gas space velocity of 10,000 h-1 and the H2/N2 volume ratio of nitriding gas of 5∶1 exhibited the best catalytic activity under the reaction temperature of 600℃ with a ammonia conversion up to 98.72%.

关 键 词： 钴 钼 氮化物 碳纳米管 氨分解 制氢 催化剂

领　　域： [理学] [理学]