Abstract
Abstract Studies of the oxidative coupling of methane were performed by applying transient isotopic techniques on Sr promoted La 2 O 3 and Ca promoted ThO 2 catalysts. Pulses of methane with different oxygen concentrations and 13 CH 4 / 12 CH 4 isotopic switch experiments show that these catalysts do not activate methane unless oxygen is present in the gas phase. These measurements also indicate that no long lived methane species can be detected on the surface of the catalysts under reaction conditions. Results of the steady state 18 O/ 16 O switch experiments combined with temperature programmed isotopic exchange (TPIE) data show that Sr promotion of La 2 O 3 and Ca promotion of ThO 2 increase the mobility of lattice oxygen by creating oxygen vacancies in the solid structure.
Sign-in/Register to access full text options 
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.
