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The non-isothermal kinetics of zinc ferrite reduction with carbon monoxide

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Abstract

This study aims to reduce zinc ferrite using carbon monoxide in the temperature range of 25–1000 °C using temperature-programmed reduction. The kinetic parameters were evaluated using the Friedman isoconversional method, and multi-step reaction models were determined by nonlinear regression methods. The reduction of zinc ferrite is a stepwise process according to the thermodynamic calculation and the variation of the activation energy Ea. Ea generally remained between 100 and 120 kJ mol−1 during the reduction process. The mechanism was determined based on an F-test of the fit quality. The corresponding kinetic parameters were obtained and employed to predict the isothermal reduction of zinc ferrite. The experimental data were found to be consistent with the predicted data, suggesting that the reduction can be satisfactorily described by the presented mechanism.

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Acknowledgements

The authors would like to thank the Natural Science Foundation of China (51574295) for financial support for this study.

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Authors and Affiliations

  1. School of Material Science and Engineering, Central South University, Changsha, 410083, Hunan, China

    Ning Peng

  2. Institute of Environmental Science and Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, Hunan, China

    Zhongbing Wang, Yanjie Liang, Ning Peng & Bing Peng

  3. Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Changsha, 410083, Hunan, China

    Yanjie Liang, Ning Peng & Bing Peng

Authors
  1. Zhongbing Wang
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  2. Yanjie Liang
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  3. Ning Peng
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  4. Bing Peng
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Correspondence to Ning Peng.

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Wang, Z., Liang, Y., Peng, N. et al. The non-isothermal kinetics of zinc ferrite reduction with carbon monoxide. J Therm Anal Calorim 136, 2157–2164 (2019). https://doi.org/10.1007/s10973-018-7841-3

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  • DOI: https://doi.org/10.1007/s10973-018-7841-3

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