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An experimental study on thermal decomposition behavior of magnesite

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Abstract

Thermal decomposition of magnesite is investigated by using a TG–MS. Different kinetic methods including Coats–Redfern, Flynn–Wall–Ozawa, and Kissinger–Akahira–Sunose are used to investigate the thermal decomposition kinetics of magnesite. It was observed that the activation energy values obtained by these methods are similar. The average apparent activation energy is found to be about 203 kJ mol−1. The raw magnesite and its decomposition products obtained at different temperatures are analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscope (SEM). The concentration of functional groups, crystal structure and composition, and apparent morphology of decomposition products were studied in detail. The FTIR, XRD, and SEM analyses showed that magnesite was completely decomposed at 973 K to form MgO.

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Acknowledgements

This study was supported by the Natural Science Foundation of China (21176109, U1361120, and 21210102058). The authors also acknowledge the financial support through the Liaoning Outstanding Professorship Program (2011).

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Authors and Affiliations

  1. Key Laboratory of Advanced Coal and Coking Technology of Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, People’s Republic of China

    Lu Tian, Arash Tahmasebi & Jianglong Yu

  2. Chemical Engineering, University of Newcastle, Callaghan, NSW, 2308, Australia

    Jianglong Yu

Authors
  1. Lu Tian
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  2. Arash Tahmasebi
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  3. Jianglong Yu
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Correspondence to Jianglong Yu.

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Tian, L., Tahmasebi, A. & Yu, J. An experimental study on thermal decomposition behavior of magnesite. J Therm Anal Calorim 118, 1577–1584 (2014). https://doi.org/10.1007/s10973-014-4068-9

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  • DOI: https://doi.org/10.1007/s10973-014-4068-9

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