Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Insight in the crystallization kinetics of AlPO4-11 molecular sieve using di-isopropylamine as template

Version 1 : Received: 31 May 2021 / Approved: 1 June 2021 / Online: 1 June 2021 (09:22:55 CEST)

How to cite: Mapele, R.O.; Silva, A.O.S.; Souza, M.J.B.; Pedrosa, A.M.; Coriolano, A.C.F.; Fernandes, G.J.; Fernandes, V.J.; Araujo, A.S. Insight in the crystallization kinetics of AlPO4-11 molecular sieve using di-isopropylamine as template. Preprints 2021, 2021060005 (doi: 10.20944/preprints202106.0005.v1). Mapele, R.O.; Silva, A.O.S.; Souza, M.J.B.; Pedrosa, A.M.; Coriolano, A.C.F.; Fernandes, G.J.; Fernandes, V.J.; Araujo, A.S. Insight in the crystallization kinetics of AlPO4-11 molecular sieve using di-isopropylamine as template. Preprints 2021, 2021060005 (doi: 10.20944/preprints202106.0005.v1).

Abstract

The hydrothermal synthesis of aluminophosphate molecular sieve type AlPO4-11 was processed from chemicals containing psueudobohemite, 85% phosphoric acid, water, and di-isopropylamine as templating agent. The crystallization of the samples was studied by taking samples in times from 2 to 74 hours. The obtained white powder products have been characterized by XRD patterns, FT-IR spectra, thermogravimetric data, scanning electron microscopy and pH measurement of the mother liquor. The pore volume, as determined from TG and DTG curves, was ca. 0.17 cm3g-1. The crystallization process of the aluminophosphate exhibited in its initial phase a behavior of first order reaction with a specific velocity constant of ca. 0.25 h-1, as determined from XRD and FT-IR data.

Subject Areas

Hydrothermal synthesis; Microporous materials; Aluminophosphate; Crystallization kinetics

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