Abstract
Brønsted acidity in a series of zeolites with 8- and/or 10-rings (clinoptilolite, TNU-10, SUZ-4, ZSM-57, ZSM-5, TNU-9, and IM-5) was characterized by the ammonia infrared/mass spectroscopy-temperature-programmed desorption (IRMS-TPD) technique. The zeolites with mutually intersecting 10-ring channels were found to have lower acid strength than those with intersecting 10- and 8-ring channels.
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Acknowledgments
Funding for this work was provided by the Korea Science and Engineering Foundation through the National Research Laboratory Program (R0A-2007-000-20050-0) and Grant-in-Aids for Scientific Research from Japan Society for the Promotion of Science (A 08636016, C 20560721, and B 21360396).
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Katada, N., Suzuki, K., Noda, T. et al. Ammonia IRMS-TPD Characterization of Brønsted Acid Sites in Medium-pore Zeolites with Different Framework Topologies. Top Catal 53, 664–671 (2010). https://doi.org/10.1007/s11244-010-9503-y
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DOI: https://doi.org/10.1007/s11244-010-9503-y