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Thermodynamic and carbon reduction analysis of a novel magnesite decomposition system with hydrogen

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  • Zhao, Liang
  • Wang, Zeye
  • Dong, Hui
  • Yu, Zitao

Abstract

Carbon dioxide emissions from magnesium carbonate decomposition account for 10 % of industrial carbon dioxide emissions in Liaoning Province, with bleak prospects for emission reduction. An ex-situ system and an in-situ system to convert carbon dioxide into carbon monoxide in flue gas by hydrogen were put forward in this paper. The results indicate that in comparison with the conventional magnesium oxide production process, both the ex-situ and in-situ systems have the potential to reduce carbon emissions by 30 % and 42 %, respectively. This is estimated to result in a reduction of CO2 emissions by 1.15 million tons per year in Liaoning Province. Furthermore, the carbon conversion rate is the most significant factor influencing the exergy efficiency of the system. The in-situ system demonstrates superior performance in comparison to the ex-situ system, exhibiting higher exergy efficiency, higher LHV, and higher CO2 concentration in flue gas.

Suggested Citation

  • Zhao, Liang & Wang, Zeye & Dong, Hui & Yu, Zitao, 2025. "Thermodynamic and carbon reduction analysis of a novel magnesite decomposition system with hydrogen," Energy, Elsevier, vol. 339(C).
    • Handle: RePEc:eee:energy:v:339:y:2025:i:c:s0360544225046183
    DOI: 10.1016/j.energy.2025.138976
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    References listed on IDEAS

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