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Integrating a Top-Gas Recycling and CO2 Electrolysis Process for H2-Rich Gas Injection and Reduce CO2 Emissions from an Ironmaking Blast Furnace

Yichao Hu, Yinxuan Qiu

2022Englishblast furnacehydrogen injectionCO2 reductionelectrolysisironmakingenergy consumption

Abstract

Language:

Introducing CO2 electrochemical conversion technology to the iron-making blast furnace not only reduces CO2 emissions, but also produces H2 as a byproduct that can be used as an auxiliary reductant to further decrease carbon consumption and emissions. With adequate H2 supply to the blast furnace, the injection of H2 is limited because of the disadvantageous thermodynamic characteristics of the H2 reduction reaction in the blast furnace. This paper presents thermodynamic analysis of H2 behaviour at different stages with the thermal requirement consideration of an iron-making blast furnace. The effect of injecting CO2 lean top gas and CO2 conversion products H2–CO gas through the raceway and/or shaft tuyeres are investigated under different operating conditions. H2 utilisation efficiency is analyzed alongside the overall performance, providing insights into optimizing the process for enhanced sustainability in iron production.

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Cite This Work

@article{246f46dc-ee59-47f4-bc28-7d5e7e34f70d,
  title={Integrating a Top-Gas Recycling and CO2 Electrolysis Process for H2-Rich Gas Injection and Reduce CO2 Emissions from an Ironmaking Blast Furnace},
  author={Yichao Hu and Yinxuan Qiu},
  year={2022},
  language={English}
}
TY  - JOUR
TI  - Integrating a Top-Gas Recycling and CO2 Electrolysis Process for H2-Rich Gas Injection and Reduce CO2 Emissions from an Ironmaking Blast Furnace
AU  - Yichao Hu
AU  - Yinxuan Qiu
PY  - 2022
LA  - English
ER  -

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