Non-isothermal kinetics of the thermal decomposition of sodium oxalate Na2C2O4

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dc.contributor.authorChaiyo, Nopsiri
dc.contributor.authorMuanghlua, Rangson
dc.contributor.authorNiemcharoen, Surasak
dc.contributor.authorBoonchom, Banjong
dc.contributor.authorSeeharaj, Panpailin
dc.contributor.authorVittayakorn, Naratip
dc.date.accessioned2026-08-06T10:04:07Z
dc.date.available2026-08-06T10:04:07Z
dc.date.issued2012-03-01
dc.description.abstractThe thermal transformation of Na<inf>2</inf>C<inf>2</inf>O<inf>4</inf> was studied in N<inf>2</inf> atmosphere using thermo gravimetric (TG) analysis and differential thermal analysis (DTA). Na<inf>2</inf>C<inf>2</inf>O<inf>4</inf> and its decomposed product were characterized using a scanning electron microscope (SEM) and the X-ray diffraction technique (XRD). The non-isothermal kinetic of the decomposition was studied by the mean of Ozawa and Kissinger-Akahira-Sunose (KAS) methods. The activation energies (Eα) of Na<inf>2</inf>C<inf>2</inf>O<inf>4</inf> decomposition were found to be consistent. Decreasing Eα at increased decomposition temperature indicated the multi-step nature of the process. The possible conversion function estimated through the Liqing-Donghua method was 'cylindrical symmetry (R <inf>2</inf> or F<inf>1/2</inf>)' of the phase boundary mechanism. Thermodynamic functions (DH*, DG* and DS*), calculated by the Activated complex theory and kinetic parameters, indicated that the decomposition step is a high energy pathway and revealed a very hard mechanism. © Akadémiai Kiadó, Budapest, Hungary 2011.
dc.identifier.citationJournal of Thermal Analysis and Calorimetry, 107(3), 1023-1029, 2012
dc.identifier.doi10.1007/s10973-011-1675-6
dc.identifier.issn13886150
dc.identifier.other2-s2.0-84858448728
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/4155
dc.sourceJournal of Thermal Analysis and Calorimetry
dc.subjectDecomposition
dc.subjectKissinger-Akahira-Sunose method
dc.subjectOzawa method
dc.subjectSodium oxalate
dc.titleNon-isothermal kinetics of the thermal decomposition of sodium oxalate Na2C2O4
dc.typeArticle

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