纳米自组装催化剂活性金属的分散及其加氢活性  

Dispersion of metal active species and hydrogenation activity of nano self-assembly catalyst

作　　者：石振[1] 赵杉林[1] 王鼎聪[2] 李萍[1] 

机构地区：[1]辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001 [2]中国石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《现代化工》2015年第3期101-104,共4页Modern Chemical Industry

基　　金：中国石油化工集团公司内部课题(030801)

摘　　要：利用不同共浸剂制备纳米自组装催化剂,用BET、XRD和H2-TPR手段考察催化剂中活性金属的分散状态、晶型及其还原性质。结果表明,活性金属在催化剂中的分散状态与催化剂中活性金属的晶型、催化剂的还原性能以及加氢活性密切相关。当催化剂中的活性金属呈单层分散时,八面体配位Mo物种的数量最高,此时催化剂的还原性能和加氢活性最好;当活性金属在载体表面的分散状态变差时,催化剂中八面体配位Mo物种数量逐渐减少,同时催化剂的还原性能和加氢活性也随着变低。The nano self-assembly catalysts are prepared by using co-infussion method. BET, XRD and TPR techniques are used to characterize the obtained nano-assembly catalysts. The results show that the dispersion of the metal active species of the catalysts has close relationship with the crystal, reduction properties and hydrogenation activity. When the active phase is dispersed as monolayer on the support, the highest amount of octahedral coordinated Mo species, the best reduction properties and hydrogenation activity can be achieved. On the other hand, when the dispersion of the active phase becomes worse, the amount of octahedral coordinated and the reduction porperties and hydrogenation activity decrease.

关 键 词：纳米自组装 催化剂 活性金属 分散状态 

分 类 号：O643.38[理学—物理化学]