Please use this identifier to cite or link to this item: https://doi.org/10.1023/A:1014960702381
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dc.titleStepwise conversion of methane over supported metal-boron amorphous alloy catalysts
dc.contributor.authorLu, Y.
dc.contributor.authorXiong, Z.
dc.contributor.authorLi, J.
dc.contributor.authorLin, J.
dc.date.accessioned2014-11-30T06:40:58Z
dc.date.available2014-11-30T06:40:58Z
dc.date.issued2002-03
dc.identifier.citationLu, Y., Xiong, Z., Li, J., Lin, J. (2002-03). Stepwise conversion of methane over supported metal-boron amorphous alloy catalysts. Catalysis Letters 78 (1-4) : 231-237. ScholarBank@NUS Repository. https://doi.org/10.1023/A:1014960702381
dc.identifier.issn1011372X
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/113206
dc.description.abstractThe stepwise conversion of CH4 to higher hydrocarbons over HMCM-22 zeolite supported metal-boron amorphous alloy catalysts has been investigated, including: (1) the influence of metals (Co, Ni, Pt, Rh and Ru) of the catalysts on the reaction; (2) the promotional effect of V on the catalytic behavior of the catalysts; (3) the influence of hydrogenation pressure and CH4 decomposition temperature; and (4) the nature of carbon species. It is found that the yield of C2 + hydrocarbons is strongly dependent on the metals. Good yields of C2 + hydrocarbon are reached only on the supported NiB and CoB catalysts. The probability of C-C chain growth is increased by V promotion without seriously affecting the activities of CH4 decomposition and hydrogenation. The ease of carbon removal via hydrogenation is strongly affected by the CH4 decomposition temperature. Increasing hydrogenation temperature has a negative effect on the yield of C2 + hydrocarbons. XPS measurements show that a carbide-(like) carbon species is active and selective for hydrogenation to produce higher hydrocarbons. Its activity/selectivity is greatly reduced at high CH4 decomposition temperatures, mainly due to transition of the reactive carbidic to un-reactive graphitic form. Graphite/filamental carbons were found to be formed at high CH4 decomposition temperature.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1023/A:1014960702381
dc.sourceScopus
dc.subjectAmorphous alloy catalyst
dc.subjectCarbon
dc.subjectHigher hydrocarbon formation
dc.subjectHydrogen production
dc.subjectHydrogenation
dc.subjectStepwise conversion of methane
dc.typeArticle
dc.contributor.departmentCHEMICAL AND PROCESS ENGINEERING CENTRE
dc.contributor.departmentPHYSICS
dc.description.doi10.1023/A:1014960702381
dc.description.sourcetitleCatalysis Letters
dc.description.volume78
dc.description.issue1-4
dc.description.page231-237
dc.description.codenCALEE
dc.identifier.isiut000175691600036
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