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Dehydroxylation of Hydrogen Zeolites: Conditions for the Preparation of Thermally Stable Catalysts

✍ Scribed by Dr. Laszlo Marosi

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
884 KB
Volume
19
Category
Article
ISSN
0044-8249

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✦ Synopsis

The elimination of water from hydrogen zeolites proceeds in two steps: (i) between ca. 320 and 550°C water is eliminated from hydroxy groups coordinated to adjacent framework aluminum atoms; (ii) between ca. 550 and 630°C water elimination proceeds via migration of framework aluminum atoms into the intracrystalline pore system. Suitable choice of conditions, especially in the last stage, provides a means of influencing the quality of the resulting zeolite catalysts. Too fast a heat‐up rate between 500 and 600°C causes the crystal lattice to collapse.

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