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Autoclave synthesis and thermal transformations of the aluminophosphate molecular sieve VPI-5: an in situ X-ray diffraction study

✍ Scribed by Heyong He; Paul Barnes; Juliet Munn; Xavier Turrillas; Jacek Klinowski

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 824 KB
Volume: 196
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(92)85966-e

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✦ Synopsis

The synthesis of DPA-VPI-5 and TBA-VPI-5 and their phase transformation to AIPO4-8 have been studied by X-ray diffraction in situ. The synchrotron radiation-energy dispersive diffraction is shown to be able to monitor these two fast reactions in real time. The results indicate that nucleation may occur already during the aging of the synthesis gel. The different rates oftransformtion of DPA-VPI-5 and TBA-VPI-5 show that the microstructure of the two materials is different.

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