A novel catalytic approach to the production of aromatics and ethene directly from methane (Ⅱ)——TPSHR and characterization of the surface carbonaceous species on Mo/HZSM-5  

作　　者：王林胜 崔巍 刘宪春 徐奕德 郭燮贤 

机构地区：[1]State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

出　　处：《Progress in Natural Science:Materials International》1999年第2期30-34,共5页自然科学进展·国际材料（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 2939200).

摘　　要：The surface carbonaceous species on Mo/HZSM-5, which are formed from methane dehydrogena-non and aromatization, are characterized by temperature programmed oxidation (TPO), 13 C CPMAS NMR and stud-red by Temperature programmed surface hydrogenation reaction (TPSHR). According to their peak temperatures in the profile of TPO, three carbonaceous species of Cα, Cβ, and Cγ on Mo/HZSM-5 can be detected. Cα is the most ac-tise and Cβ second as far as the reaction with hydrogen is concerned. Cγ is inert and deposited on HZSM-5. Two types of surface carbonaceous species of Cσ and Cπ on used Mo/HZSM-5 can be identified by 13C CPMAS-NMR, whereas only Cσ on HZSM-5 Cσ is sp3 coordinated carbon and Cπ is sp2 coordinated.The surface carbonaceous species on Mo/HZSM-5, which are formed from methane dehydrogena-non and aromatization, are characterized by temperature programmed oxidation (TPO), 13 C CPMAS NMR and stud-red by Temperature programmed surface hydrogenation reaction (TPSHR). According to their peak temperatures in the profile of TPO, three carbonaceous species of Cα, Cβ, and Cγ on Mo/HZSM-5 can be detected. Cα is the most ac-tise and Cβ second as far as the reaction with hydrogen is concerned. Cγ is inert and deposited on HZSM-5. Two types of surface carbonaceous species of Cσ and Cπ on used Mo/HZSM-5 can be identified by 13C CPMAS-NMR, whereas only Cσ on HZSM-5 Cσ is sp3 coordinated carbon and Cπ is sp2 coordinated.

关 键 词：TPO TPSHR CARBONACEOUS DEPOSIT Mo/HZSM-5. 

分 类 号：N[自然科学总论]