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题名: On the reactivity of Mo species for methane partial oxidation on Mo/HMCM-22 catalysts
作者: Miao, SJ;  Liu, L;  Lian, YX;  Zhu, XX;  Zhou, ST;  Wang, Y;  Bao, XH
关键词: methane partial oxidation ;  formaldehyde ;  Mo/HMCM-22 ;  tetrahedral molybdate ;  octahedral polyoxomolybdate
刊名: CATALYSIS LETTERS
发表日期: 2004-09-01
卷: 97, 期:3-4, 页:209-215
收录类别: SCI
文章类型: Article
项目归属: 502
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: By characterizing fresh and used Mo/HMCM-22 catalysts with ICP-AES, XRD, NH3-TPD technique, UV - Vis DRS and UV Raman spectroscopy, the reactivity of Mo species for methane partial oxidation into formaldehyde were directly studied with a new point of view. By comparing the fresh and used catalysts, it was found that the tetrahedral Mo species bonding chemically to the support surface were practically unchanged after the reaction, while the polymolybdate octahedral Mo species, which had a rather weak interaction with the MCM-22 zeolite, leached out during the reaction, especially when the Mo loading was high. Correspondingly, it was found from the time-on-stream reaction data that the HCHO yield remained unchanged, while COx decreased with the reaction time during the reaction. By combining the characterization results and the reaction data, it can be drawn that the isolated tetrahedral molybdenum oxo-species (T-d) is responsible for HCHO formation, while the octahedral polyoxomolybdate species (O-h) will lead to the total oxidation of methane.
关键词[WOS]: SUPPORTED MOLYBDENUM OXIDE ;  DEHYDRO-AROMATIZATION ;  MO/MCM-22 CATALYSTS ;  MOO3/SIO2 CATALYSTS ;  SELECTIVE OXIDATION ;  EXCESS AMOUNT ;  WATER-VAPOR ;  FORMALDEHYDE ;  SILICA ;  ALUMINA
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000223403000017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/82083
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Nat Gas Utilizat & Appl Catalysis Lab, Dalian 116023, Peoples R China

Recommended Citation:
Miao, SJ,Liu, L,Lian, YX,et al. On the reactivity of Mo species for methane partial oxidation on Mo/HMCM-22 catalysts[J]. CATALYSIS LETTERS,2004,97(3-4):209-215.
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