Abstract
The exchange of Eu 3+ for Na + cations into the sodalite cages of X zeolite (Eu 25Na 11X) leads selectively to the isomerization reaction of cyclopropane to propylene. The latter reaction is catalyzed by Brønsted acid sites with an apparent activation energy of 10.6 kcal/mol. Sorption measurements of cyclopropane and propylene with Eu/NaX and NaX zeolites at 40°C support the view that Na + cations might be considered as sites for sorption of these molecules. Force fields created by Eu 4O 10+ present in Eu/NaX zeolite may affect sorption. On the other hand, Brønsted acid sites in Eu/NaX enhance sorption of cyclopropane and propylene at 40°C. Chemisorption of propylene on the Brønsted acid sites of Eu/NaX is reversible and may occur via a propylene carbenium cation intermediate. Small amounts of hexene are formed during this sorption. The amount of Brønsted acid sites in the present Eu/NaX is at least 0.6 mmol/g cat
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.
