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

Marosi Laszlo | Zendy

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

Author(s) -

Marosi Laszlo

Publication year - 1980

Publication title -

angewandte chemie international edition in english

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 0570-0833

DOI - 10.1002/anie.198007431

Subject(s) - zeolite , catalysis , hydrogen , aluminium , crystal (programming language) , chemical engineering , materials science , inorganic chemistry , chemistry , metallurgy , organic chemistry , computer science , engineering , programming language

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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