TITLE

# Thermal decomposition kinetics of potassium iodate

AUTHOR(S)
Muraleedharan, K.
PUB. DATE
July 2012
SOURCE
Journal of Thermal Analysis & Calorimetry;Jul2012, Vol. 109 Issue 1, p237
SOURCE TYPE
DOC. TYPE
Article
ABSTRACT
The rate and kinetics of the thermal decomposition of potassium iodate (KIO) has been studied as a function of particle size, in the range 63-150 Î¼m, by isothermal thermogravimetry at different temperatures, 790, 795, 800 and 805 K in nitrogen atmosphere. The theoretical and experimental mass loss data are in good agreement for the thermal decomposition of all samples of KIO at all temperatures studied. The isothermal decomposition of all samples of KIO was subjected to both model-fitting and model-free (isoconversional) kinetic methods of analysis. It has been observed that the activation energy values are independent of the particle size. Isothermal model-fitting analysis shows that the thermal decomposition kinetics of all the samples of KIO studied can be best described by the contracting cube equation.
ACCESSION #
76447170

## Related Articles

• TG/DTA/MS of Poly(Methyl Methacrylate), The Effect of Particle Size. Dakka, S. M. // Journal of Thermal Analysis & Calorimetry;2003, Vol. 74 Issue 3, p729

Thermogravimetric analysis in conjunction with evolved gas analysis are discussed for powder PMMA, particle diameter of 0.1 mm. Furthermore, differential thermal analysis measurements were performed in both pure nitrogen and oxidative environment. These measurements are conducted to assess major...

• Effect of particle size on the oxidation of WC powders during heating. Kurlov, A.; Gusev, A. // Inorganic Materials;Feb2011, Vol. 47 Issue 2, p133

The oxidation of tungsten carbide powders ranging in average particle size -D from 20 to 6000 nm has been studied by thermal analysis. Independent of particle size, the WC powders oxidize to the higher oxide WO. With decreasing particle size, the oxidation rate increases, and the exothermic peak...

• Synthesis, characterization and thermal analysis of KM(SO)Â·6HO (M = Mg, Co, Cu). Souamti, A.; Zayani, L.; Palomino, J.; Cruz-Yusta, M.; Vicente, C.; Hassen-Chehimi, D. // Journal of Thermal Analysis & Calorimetry;Nov2015, Vol. 122 Issue 2, p929

Synthesis, characterization and thermal behavior for Tutton's salts KM(SO)Â·6HO (M = Mg, Co, Cu) are reported. These double salts crystallize in the monoclinic system, with the space group $$P\frac{{2_{1} }}{a}$$ ( Z = 2). The unit-cell parameters were affined with 'Affma' software. The IR...

• Investigation on synthesis and microstructure of potassium tetratitanate. Zaremba, Teresa // Journal of Thermal Analysis & Calorimetry;Mar2008, Vol. 91 Issue 3, p911

Potassium tetratitanate K2Ti4O9 was synthesized from the anatase-K2CO3 starting materials by the heating calcination. DTA, TG, DTG and XRD methods were used to study the formation of intermediate compounds and the final product. The characterization of the K2Ti4O9 crystals was carried out by...

• Critical nanoparticle size for thermal stability. Praserthdam, P.; Phungphadung, J.; Somrang, P.; Kunyanucharat, A.; Silveston, P.; Tanakulrungsank, W. // Journal of Materials Science Letters;Nov2003, Vol. 22 Issue 22, p1587

The article focuses on the critical nanoparticle size for thermal stability. In temperature ranges up to a few hundred degrees above ambient temperature size changes even with unstable single crystals will be small. Crystallites of nano dimension can be formed by many methods. The method...

• Effect of particle size on pyrolysis characteristics of Elbistan lignite. Ozbas, K. // Journal of Thermal Analysis & Calorimetry;Aug2008, Vol. 93 Issue 2, p641

In this study, the relationship between particle size and pyrolysis characteristics of Elbistan lignite was examined by using the thermogravimetric (TG/DTG) and differential thermal analysis (DTA) techniques. Lignite samples were separated into different size fractions. Experiments were...

• Comparative results of kinetic data obtained with different methods for complex decomposition steps. Vlase, T.; Vlase, Gabriela; Birta, Nicoleta; Doca, N. // Journal of Thermal Analysis & Calorimetry;Jun2007, Vol. 88 Issue 3, p631

A comparative kinetic analysis on the thermal decomposition of tartaric acid and potassium tartrate under non-isothermal conditions was performed. The non-isothermal kinetic parameters were determined by the following four methods: integral isoconversional method suggested by Flynn-Wall-Ozawa...

• Synthesis and characterization of Pb1â€“xLaxTiO3 nanocrystalline powders. Mesquita, A.; Bernardi, M.; Maia, L.; Mastelaro, V. // Journal of Thermal Analysis & Calorimetry;Mar2007, Vol. 87 Issue 3, p747

Pb1â€“xLaxTiO3 (PLT) nanocrystalline powders were obtained by polymeric precursor method. The samples were analyzed by differential scanning calorimetry (DSC) and thermogravimetry (TG) techniques to characterize properly the distinct thermal events occurring during synthesis. The X-ray...

• Macroalgae Pyrolysis and Its Devolatilisation Kinetics. Daneshvar, Somayeh; Salak, Feridoun; Otsuka, Koji // International Proceedings of Chemical, Biological & Environmenta;2012, Vol. 38, p77

The pyrolysis characteristics of a green macroalgae (Codium Fragile) as a model for marine biomass were studied using a thermogravimetric analyzer (TGA) to understand the devolatilization process as well as kinetic parameters as they undergo heat treatment. The sample was introduced to pyrolysis...

Share