Abstract
The conversion of n-hexane on Pt-containing dealuminated mordenites and ZSM-5 zeolites was studied. The framework composition and the concentrations of extraframework aluminum compounds in mordenites were determined by X-ray diffraction analysis. It was demonstrated that the aluminum content of the framework affected the activity in n-hexane isomerization. It was found that a Pt-mordenite catalyst containing a considerable amount of extraframework aluminum compounds exhibited maximum activity. A quantum-chemical study of the interaction of platinum with Bronsted and Lewis acid sites was performed. It was hypothesized that oxidized surface platinum nanoparticles were the active sites of Pt-containing high-silica zeolites. These nanoparticles were formed by the interaction of platinum clusters with proton sites or extraframework aluminum compounds. An alternative mechanism was proposed for the conversion of alkanes to exclude the direct participation of acid sites.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.