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2005•Zeitschrift für Physikalische ChemieRequires access

The Thermal Decomposition Kinetics of [Co(bipy)(H2O)4](C4H4O4)·4H2O

F. Yakuphanoğlu, Shao‐Ming Ying

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Abstract

Abstract The thermal decomposition kinetics of [Co(bipy)(H2O)4](C4H4O4) · 4H2O was carried out by thermogravimetry (TG) and derivate thermogravimetry (DTG) analysis at four heating rates of 5, 8, 11 and 14 °C/min in nitrogen atmosphere. TG confirmed that thermal decomposition of the compound takes place in a single step. The kinetic parameters (activation energy, frequency factor, and activation entropy) were calculated using various forms of non-isothermal methods. The activation energy obtained by the Ozawa method is in agreement with the value determined by the Coats–Redfern technique. However, a much lower activation energy was obtained by the Kissinger method.

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What this paper is about

Abstract The thermal decomposition kinetics of [Co(bipy)(H2O)4](C4H4O4) · 4H2O was carried out by thermogravimetry (TG) and derivate thermogravimetry (DTG) analysis at four heating rates of 5, 8, 11 and 14 °C/min in nitrogen atmosphere. TG confirmed that thermal decomposition of the compound takes place in a single step. The kinetic parameters (activation energy, frequency factor, and activation entropy) were calculated using various forms of non-isothermal methods. The activation energy obtained by the Ozawa method is in agreement with the value determined by the Coats–Redfern technique. However, a much lower activation energy was obtained by the Kissinger method.

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Available abstract

Abstract The thermal decomposition kinetics of [Co(bipy)(H2O)4](C4H4O4) · 4H2O was carried out by thermogravimetry (TG) and derivate thermogravimetry (DTG) analysis at four heating rates of 5, 8, 11 and 14 °C/min in nitrogen atmosphere. TG confirmed that thermal decomposition of the compound takes place in a single step. The kinetic parameters (activation energy, frequency factor, and activation entropy) were calculated using various forms of non-isothermal methods. The activation energy obtained by the Ozawa method is in agreement with the value determined by the Coats–Redfern technique. However, a much lower activation energy was obtained by the Kissinger method.

Key concepts: Thermogravimetry, Activation energy, Thermal decomposition, Kinetics, Isothermal process, Decomposition, Kinetic energy, Physical chemistry

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