Kinetic study of dehydration of calcium oxalate trihydrate

The dehydration of calcium oxalate trihydrate was studied using DSC method and open sample crucibles. The dehydration proceeds in two steps where first two molecules of water are released around 80 °C and consequently the last molecule of water is released at a temperature around 130 °C. The kinetic...

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Veröffentlicht in:	Journal of thermal analysis and calorimetry 2016-04, Vol.124 (1), p.151-158
Hauptverfasser:	Honcová, P., Svoboda, R., Pilný, P., Sádovská, G., Barták, J., Beneš, L., Honc, D.
Format:	Artikel
Sprache:	eng
Schlagworte:	Analysis Analytical Chemistry Calcium Calorimetry Chemistry Chemistry and Materials Science Crucibles Dehydration Exponents Hydrates Inorganic Chemistry Mathematical models Measurement Science and Instrumentation Oxalates Oxalic acid Physical Chemistry Polymer Sciences Reaction kinetics
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Beschreibung
Zusammenfassung:	The dehydration of calcium oxalate trihydrate was studied using DSC method and open sample crucibles. The dehydration proceeds in two steps where first two molecules of water are released around 80 °C and consequently the last molecule of water is released at a temperature around 130 °C. The kinetic analysis of overlapping peaks was performed, and the apparent activation energy, pre-exponential factor, and kinetic exponents of kinetic model (reaction order model) were evaluated for both effects.
ISSN:	1388-6150 1588-2926 1572-8943
DOI:	10.1007/s10973-015-5110-2