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Oxidative bromination of methane on silica-supported non-noble metal oxide catalysts
Lin, Ronghe1,3; Ding, Yunjie1,2; Gong, Leifeng1,3; Li, Jingwei1,3; Chen, Weimiao1; Yan, Li1; Lu, Yuan1; Ding YJ(丁云杰)
KeywordMethane Oxidative Bromination Non-noble Metal Oxide Bao/sio(2) (Ch(3)Oh + Ch(3)Br): Co Metathesis Deactivation Mechanism
Source PublicationAPPLIED CATALYSIS A-GENERAL
2009-01-31
DOI10.1016/j.apcata.2008.10.029
Volume353Issue:1Pages:87-92
Indexed BySCI
SubtypeArticle
Department8
Funding Project805
Contribution Rank1;1
WOS HeadingsScience & Technology ; Physical Sciences ; Life Sciences & Biomedicine
WOS SubjectChemistry, Physical ; Environmental Sciences
WOS Research AreaChemistry ; Environmental Sciences & Ecology
WOS KeywordACETIC-ACID ; HIGHER HYDROCARBONS ; INTEGRATED PROCESS ; MANGANESE OXIDE ; CH4 ; CONDENSATION ; ACTIVATION ; CONVERSION ; BA ; CO
AbstractOxidative bromination of methane, mediated by HBr/H(2)O (solution), provides an original route for the production of oxygenates and gasoline directly from natural gas. However, the reported catalysts for this reaction all involved noble metals. From the consideration of replacing noble metal catalysts with cheaper oxides, various silica-supported oxide catalysts were surveyed. It was found that the redox ability of different metals had a strong impact on the product distribution. On the catalysts with metals that lack facile redox ability, such as BaO/SiO(2), both CH(3)Br and CO were main products. Otherwise, deep oxidation proceeded. Moreover, methanol was firstly reported in this system. In order to obtain a molar ratio of (CH(3)OH + CH(3)Br): CO = 1, which can provide a perfect feedstock for the synthesis of acetic acid, the process variables were optimized on BaO/SiO(2). It was demonstrated that 44.0% methane conversion and 95% total selectivity of CH(3)Br, CH(3)OH and CO could be achieved at 620 degrees C. and the molar ratio of (CH(3)Br + CH(3)OH): CO was close to 1. Time-on-stream tests showed declined catalytic performance after 30 h. The results from N(2)-adsorption, XRF and XRD implied that aggregation of barium particles occurred, making the metathesis between BaO and BaBr(2) difficult. The functions of BaO were also proposed. Additionally, the activity data were compared with those of noble metal catalysts. (C) 2008 Elsevier B.V. All rights reserved.
Language英语
URL查看原文
WOS IDWOS:000262566900013
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/101957
Collection中国科学院大连化学物理研究所
Corresponding AuthorDing YJ(丁云杰)
Affiliation1.Chinese Acad Sci, Appl Catalysis Lab, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Lin, Ronghe,Ding, Yunjie,Gong, Leifeng,et al. Oxidative bromination of methane on silica-supported non-noble metal oxide catalysts[J]. APPLIED CATALYSIS A-GENERAL,2009,353(1):87-92.
APA Lin, Ronghe.,Ding, Yunjie.,Gong, Leifeng.,Li, Jingwei.,Chen, Weimiao.,...&丁云杰.(2009).Oxidative bromination of methane on silica-supported non-noble metal oxide catalysts.APPLIED CATALYSIS A-GENERAL,353(1),87-92.
MLA Lin, Ronghe,et al."Oxidative bromination of methane on silica-supported non-noble metal oxide catalysts".APPLIED CATALYSIS A-GENERAL 353.1(2009):87-92.
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