ICCAS OpenIR
Bromine-mediated conversion of methane to C1 oxygenates over Zn-MCM-41 supported mercuric oxide
Li, Fengbo; Yuan, Guoqing; Yan, Fang; Yan, Fengwen
2008-02-01
Source PublicationAPPLIED CATALYSIS A-GENERAL
ISSN0926-860X
Volume335Issue:1Pages:82-87
AbstractThe structure mobility of the zigzag mercuric oxide chains and the strong preference of mercuric (11) cation sites for bromine lead to a novel bromine-mediated partial methane oxidation at relatively low reaction temperature (220 degrees C). Zn-MCM-41 supported mercuric oxide nanophases were used as the model catalyst to investigate the role of bromine in the catalytic cycle. The introduction of bromine to feed gas consisting of CH4/O-2/Ar (3:1:6) leads to a sharp increase in the methane conversion. Meanwhile, a transient high product selectivity to C 1 oxygenates was observed. Two bromine-mediated routes can be identified: MeHgBrn as the intermediate species and mercuric hypobromite as the active agent for methane oxidation, which occur simultaneously in the methane conversion. The controlling mechanism transfers from the former to the latter with the gradual fixation of bromine into mercuric oxide lattice. The catalyst was characterized detailedly by XRD, XPS, and N-2 Sorption. The chemical composite changes of active species were detected by XPS, which provide some direct information about the mediator role of bromine in the catalytic cycle. (C) 2007 Elsevier B.V. All rights reserved.
KeywordBromine Methane Selective Oxidation C1 Oxygenates Mercuric Oxide
DOI10.1016/j.apcata.2007.11.014
Indexed BySCI
Language英语
WOS IDWOS:000253366100011
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63870
Collection中国科学院化学研究所
Corresponding AuthorYuan, Guoqing
AffiliationChinese Acad Sci, BNLMS, Inst Chem, Lab New Mat, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Li, Fengbo,Yuan, Guoqing,Yan, Fang,et al. Bromine-mediated conversion of methane to C1 oxygenates over Zn-MCM-41 supported mercuric oxide[J]. APPLIED CATALYSIS A-GENERAL,2008,335(1):82-87.
APA Li, Fengbo,Yuan, Guoqing,Yan, Fang,&Yan, Fengwen.(2008).Bromine-mediated conversion of methane to C1 oxygenates over Zn-MCM-41 supported mercuric oxide.APPLIED CATALYSIS A-GENERAL,335(1),82-87.
MLA Li, Fengbo,et al."Bromine-mediated conversion of methane to C1 oxygenates over Zn-MCM-41 supported mercuric oxide".APPLIED CATALYSIS A-GENERAL 335.1(2008):82-87.
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