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dc.contributor.authorLiang, Yin
dc.contributor.authorLi, Zhikao
dc.contributor.authorNourdine, Mohamed
dc.contributor.authorShahid, Salman
dc.contributor.authorTakanabe, Kazuhiro
dc.date.accessioned2015-08-03T11:51:53Z
dc.date.available2015-08-03T11:51:53Z
dc.date.issued2014-03-24
dc.identifier.issn18673880
dc.identifier.doi10.1002/cctc.201400018
dc.identifier.urihttp://hdl.handle.net/10754/563453
dc.description.abstractA universal reaction mechanism involved in the oxidative coupling of methane (OCM) is demonstrated under oxy-steam conditions using alkali-metal-based catalysts. Rigorous kinetic measurements indicated a reaction mechanism that is consistent with OH radical formation from a H 2O-O2 reaction followed by C-H activation in CH 4 with an OH radical. Thus, the presence of water enhances both the CH4 conversion rate and the C2 selectivity. This OH radical pathway that is selective for the OCM was observed for the catalyst without Mn, which suggests clearly that Mn is not the essential component in a selective OCM catalyst. The experiments with different catalyst compositions revealed that the OH.-mediated pathway proceeded in the presence of catalysts with different alkali metals (Na, K) and different oxo anions (W, Mo). This difference in catalytic activity for OH radical generation accounts for the different OCM selectivities. As a result, a high C2 yield is achievable by using Na2WO4/SiO2, which catalyzes the OH.-mediated pathway selectively. Make it methane: A universal reaction mechanism involved in the oxidative coupling of methane is demonstrated under oxy-stream conditions by using alkali-metal-based catalysts. Rigorous kinetic measurements indicated a reaction mechanism that is consistent with OH radical formation from an H2O-O2 reaction, followed by C-H activation in CH4 with an OH radical. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
dc.publisherWiley
dc.subjectalkali metals
dc.subjectkinetics
dc.subjectoxidative coupling
dc.subjectradicals
dc.subjectreaction mechanisms
dc.subjectsupported catalysts
dc.titleMethane coupling reaction in an oxy-steam stream through an OH radical pathway by using supported alkali metal catalysts
dc.typeArticle
dc.contributor.departmentCatalysis for Energy Conversion (CatEC)
dc.contributor.departmentChemical Engineering Program
dc.contributor.departmentChemical Science Program
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalChemCatChem
dc.contributor.institutionDepartment of Chemical Engineering, Universiti Teknologi Petronas, Tronoh, Perak, Malaysia
dc.contributor.institutionDepartment of Chemical Engineering, Indian Institute of Technology Kharagpur, 721302, Kharagpur West-Bengal, India
kaust.personTakanabe, Kazuhiro
kaust.personLiang, Yin
kaust.personLi, Zhikao
dc.date.published-online2014-03-24
dc.date.published-print2014-03-24


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