Abstract
The elementary reactions in the catalytic oxidative coupling of methane are not completely understood yet, especially those leading to side products. Methyl radicals are produced at the catalyst surface and react further in the gas phase. Ethane is largely produced in the gas phase as primary C 2 product, which is subsequently dehydrogenated to ethane. The oxidative coupling of methane over Sn/Li/MgO in the presence of both methane and oxygen at a temperature of 973 K proceeds as follows. Methyl radicals are produced at the surface and combine in the gas phase to form ethane. Ethene is produced from ethane via a gas phase reaction in which dioxygen is involved. This reaction may involve ethyl radicals produced by the catalyst. Both ethane and ethane are oxidized to carbon monoxide at the surface. Carbon monoxide is oxidized to carbon dioxide by interaction with the surface. Parallel to the formation of ethane, methane is directly converted to carbon dioxide by involvement of adsorbed oxygen. It seems likely that the latter also proceeds via lattice oxygen. Both lattice and adsorbed oxygen are involved in the non selective reaction path of ethane.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
