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On the reactivity of Mo species for methane partial oxidation on Mo/HMCM-22 catalysts
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
2004-09-01
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
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
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.
语种英语
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WOS记录号WOS:000223403000017
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/82083
专题中国科学院大连化学物理研究所
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
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GB/T 7714
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.
APA Miao, SJ.,Liu, L.,Lian, YX.,Zhu, XX.,Zhou, ST.,...&Bao, XH.(2004).On the reactivity of Mo species for methane partial oxidation on Mo/HMCM-22 catalysts.CATALYSIS LETTERS,97(3-4),209-215.
MLA Miao, SJ,et al."On the reactivity of Mo species for methane partial oxidation on Mo/HMCM-22 catalysts".CATALYSIS LETTERS 97.3-4(2004):209-215.
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