Thermodynamics and kinetics of the dehydration reaction of FePO_4 2H_2O

Banjong Boonchom; Spote Puttawong

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Thermodynamics and kinetics of the dehydration reaction of FePO_4 2H_2O

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The thermal decomposition kinetics of FePO_4 2H_2O in dynamical air atmosphere was studied by mean TG–DTG–DTA. The stage and product of the thermal decomposition were determined. A number of kinetic models and calculation procedures were used to determine the kinetic triplet and thermodynamic parameters characterizing the dehydration process. The obtained activation energy and most kinetic model indicate the single kinetic mechanism and three-dimension diffusion as ‘‘Ginstling–Brounstein equation (D4 model)’’, respectively. The thermodynamic functions (△H~*, △G~* and △S~*) of the dehydration reaction are calculated by the activated complex theory and indicate that the process is non-spontaneous without connecting with the introduction of heat. The kinetic and thermodynamic results were satisfactory which present good correlation with a linear correlation coefficient close to unit a low standard deviation.

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《Physica, B. Condensed Matter》 |2010年第9期|2350-2355|共6页
作者
Banjong Boonchom; Spote Puttawong;
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作者单位

King Mongkut’s Institute of Technology Ladkrabang, Chumphon Campus, 17/1 M. 6 Pha Thiew District, Chumphon 86160, Thailand;

Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;

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正文语种英语
中图分类物理学;
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Inorganic compounds; Thermogravimetric analysis (TGA); Non-isothermal kinetics; Thermodynamic properties;

Thermodynamics and kinetics of the dehydration reaction of FePO_4 2H_2O

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