Abstract
A new simple characterization method was employed to investigate the formation of carbon deposits in reduced Co/Y zeolites. The method was based on temperature programmed surface reaction (TPSR) between adsorbed carbon deposits and hydrogen. Together with other characterization methods of FMR, TEM and H 2 chemisorption, CO hydrogenation reaction was performed on Co/Y zeolite catalysts, and the changes in CO hydrogenation activity and selectivity with metal distributions were also investigated. Especially the studies have discussions about the selectivity pattern of cobalt clusters within Y-zeolite cages and large cobalt metal aggregates on the external surface of the zeolites. The catalyst having most of cobalt metal clusters inside the zeolite cages showed much more selective synthesis of C 3 and C 4 products than the other catalysts. It is suggested that the lower hydrogenating ability induced the enhanced chain propagation and the chain growth was terminated by the surface sites of cobalt clusters.
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.
