Identification of ZSM-type and other 5-ring containing zeolites by i.r. spectroscopy
β Scribed by J.C. Jansen; F.J. van der Gaag; H. van Bekkum
- Book ID
- 103550450
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 307 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0144-2449
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π SIMILAR VOLUMES
HZSM-5 zeolites and H mordenite were studied using diffuse reflectance i.r. spectroscopy in the region of stretching vibrations of hydroxyls. A new type of acidic OH groups was detected that represents a bridged hydroxyl forming a strained intramolecular hydrogen bond with a neighboring oxygen atom.
Different iron-containing H-ZSM-5 type zeolites have been used as catalysts for the coupled methanol-hydrocarbon cracking (CMHC) process with n-butane as hydrocarbon feed. Furthermore, these iron-containing zeolites (synthesis: silicon-to-iron ratio = 15 : 150 and silicon-to-ironto-aluminium ratio =
The combined use of thermal analysis (t.g.-d.t.a.) and 13C-n.m.r. spectroscopy allows one to identify four different structural environments for TPA + ions occluded in the ZSM-5 channels. A first low-temperature (ca. 380Β°C) d.t.a, peak is assigned to less strongly held or outer shell "strained" TPA