Abstract
The surface species formed by the interaction of methanol with HY and HZSM-5 zeolites modified with nonskeletal Al were examined using FT-IR spectroscopy and temperature-programmed desorption accompanied by conversion of preadsorbed methanol with mass spectrometric detection of the products evolved. Physisorbed methanol perturbed by various surface sites, methylcarboxonium ions, skeletal methoxyls ▪, methoxyls on nonskeletal aluminium Al nO(CH 3), and methoxyls substituting for silanol groups ▪ were found on both zeolite types. Their occurrence depended on the zeolite composition and the reaction temperature. The role of skeletal methoxyls and Al nOCH 3 in the methanol conversion is discussed. In addition to the reaction of preadsorbed methanol the conversion over ZSM-5 catalysts under on-stream conditions was found to be sensitive to the presence of nonskeletal Al n.
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.
