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Relationship between Differential Heats of Adsorption and Brønsted Acid Strengths of Acidic Zeolites: H-ZSM-5 and H-Mordenite

✍ Scribed by Lee, C.; Parrillo, D. J.; Gorte, R. J.; Farneth, W. E.

Book ID
125529700
Publisher
American Chemical Society
Year
1996
Tongue
English
Weight
189 KB
Volume
118
Category
Article
ISSN
0002-7863

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1H solid-state NMR studies of the geomet
1H solid-state NMR studies of the geometry of Brønsted acid sites in zeolites H-ZSM-5
✍ Michael Hunger; Dieter Freude; Dieter Fenzke; Harry Pfeifer 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 419 KB

Broad-line 'H NMR and 'H MAS NMR were used to determine the geometry of the Bransted acidic sites in zeolites H-ZSM-5. The signals obtained correspond to bridging hydroxyl groups in Si-OH-Al arrangements with an H-Al distance of 0.246-0.252 nm. The concentration of hypothetical SiOHSi groups must be