铜离子的引入对甲烷无氧芳构化催化剂Mo/CuH-ZSM-5中Mo物种化学状态的影响  

The Effect of Cu Species on the Chemical State of Mo in the Mo/CuH-ZSM-5 Catalyst for Methane Non-oxidative Aromatization

作　　者：李爽[1] 王东阳[1] 傅颖寰[1] 吴鹏[1] 吴通好[1] 刘颖[2] 张春雷[3] 林励吾[3] 包信和[3] 

机构地区：[1]吉林大学化学系,长春130023 [2]大庆油田化工总厂,大庆163712 [3]中国科学院大连化学物理研究所,大连116023

出　　处：《高等学校化学学报》2000年第3期427-430,共4页Chemical Journal of Chinese Universities

基　　金：中国博士后科学基金;国家"九五"攀登计划!(批准号 :95 -预 -36 -2.1);国家重点基础研究发展规划!(批准号:G19990 2 2 40 0 )资助

摘　　要：对比考察了 Mo/Cu H-ZSM-5和 Mo/H-ZSM-5催化剂的甲烷无氧芳构化性能 ,并用 XRD,XPS,ESR等多种测试手段对反应前后催化剂上的 Mo物种及铜助剂的价态变化进行了详细研究 ,发现 Cu( )部分取代 H-ZSM-5交换位上的 H+后 ,抑制了活性组分 Mo O3的还原 ,而 Cu物种自身被还原 。The catalytic performance of Mo/CuH ZSM 5 was compared with that of Mo/H ZSM 5 for methane aromatization in the absence of oxygen. The Cu ions acted as promoters, and the activity and stability of catalysts for methane aromatization were enhanced to some extent. The fresh and reacted catalysts was studied by XRD, ESR and XPS methods, and it is found that by the addition of Cu species, the reduction of MoO 3 was suppressed and the Cu species itself was reduced. It is supposed that the Mo species with a higher oxidative state is responsible for the activation and conversion of methane.

关 键 词：甲烷无氧芳构化 苯 铜离子 催化剂 催化活性 

分 类 号：O623.11[理学—有机化学] O643.361[理学—化学]