Kinetics and thermodynamics of thermal decomposition of synthetic AlPO 4•2H2O

Simple item page
dc.contributor.authorBoonchom, Banjong
dc.contributor.authorDanvirutai, Chanaiporn
dc.date.accessioned2026-08-06T09:59:19Z
dc.date.available2026-08-06T09:59:19Z
dc.date.issued2009-12-01
dc.description.abstractThe non-isothermal kinetics of dehydration of AlPO<inf>4</inf>•2H <inf>2</inf>O was studied in dynamic air atmosphere by TG-DTG-DTA at different heating rates. The result implies an important theoretical support for preparing AlPO<inf>4</inf>. The AlPO<inf>4</inf>•2H<inf>2</inf>O decomposes in two step reactions occurring in the range of 80-150 °C. The activation energy of the second dehydration reaction of AlPO<inf>4</inf>•2H<inf>2</inf>O as calculated by Kissinger method was found to be 69.68 kJ mol<sup>-1</sup>, while the Avrami exponent value was 1.49. The results confirmed the elimination of water of crystallization, which related with the crystal growth mechanism. The thermodynamic functions (ΔH*, ΔG*and ΔS*) of the dehydration reaction are calculated by the activated complex theory. These values in the dehydration step showed that it is directly related to the introduction of heat and is non-spontaneous process. © 2009 Akadémiai Kiadó, Budapest, Hungary.
dc.identifier.citationJournal of Thermal Analysis and Calorimetry, 98(3), 771-777, 2009
dc.identifier.doi10.1007/s10973-009-0292-0
dc.identifier.issn13886150
dc.identifier.other2-s2.0-75149153700
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/2784
dc.sourceJournal of Thermal Analysis and Calorimetry
dc.subjectAlPO4•2H2O
dc.subjectAluminium phosphate
dc.subjectNon-isothermal kinetics
dc.subjectThermal decomposition
dc.titleKinetics and thermodynamics of thermal decomposition of synthetic AlPO 4•2H2O
dc.typeArticle

Files

Collections

Research