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Kinetics of thermal decomposition of manganese(ii) oxalate

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Abstract

The kinetics of manganese(II) oxalate thermal decomposition in the helium atmosphere was studied on the basis of isothermal measurements in the temperature range from 608 to 623 K. Manganese(II) oxide, MnO, was found to be the final product of reaction. The Avrami-Erofeev kinetic equation was used to describe all the experimental data in the range of decomposition degrees from 0.1 to 0.9. The determined activation energy equals 184.7 kJ mol-1 with standard deviation ±5.2 kJ mol-1. The estimated value of parameter n is 1.9 with standard deviation ±0.01 what suggests that the rate limiting step of MnC2O4 decomposition is the nucleation of new MnO phase and that the rate of nuclei growth is rising during decomposition.

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Authors and Affiliations

  1. Faculty of Materials Science and Ceramics, Department of Inorganic Chemistry, AGH University of Science and Technology, 30 Mickiewicz Av., 30-059, Cracow, Poland

    Barbara Małecka & Ewa Drożdż-Cieíla

  2. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 8 Niezapominajek St., 30-239, Cracow, Poland

    P. K. Olszewski

Authors
  1. Barbara Małecka
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  2. Ewa Drożdż-Cieíla
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  3. P. K. Olszewski
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Małecka, B., Drożdż-Cieíla, E. & Olszewski, P.K. Kinetics of thermal decomposition of manganese(ii) oxalate. Journal of Thermal Analysis and Calorimetry 74, 485–490 (2003). https://doi.org/10.1023/B:JTAN.0000005184.81064.f6

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  • DOI: https://doi.org/10.1023/B:JTAN.0000005184.81064.f6

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