Thermodynamic performance analysis and environmental impact assessment of an integrated system for hydrogen generation and steelmaking

Feng Li, Mansheng Chu, Jue Tang, Zhenggen Liu, Jun Guo, Ruijun Yan and Peijun Liu

Energy, 2022, vol. 241, issue C

Abstract: Hydrogen metallurgy is considered to be an effective way to achieve decarbonization for the iron and steel industry. In this work, the thermodynamic and environmental performance of a novel steelmaking process that consists of hydrogen generation, shaft furnace direct reduction, and electric furnace steelmaking (HSE process) is evaluated through energy analysis, exergy analysis, and life cycle assessments (LCA). The results show that the energy and exergy efficiency is 50.54% and 48.44% respectively. The hydrogen production system yields the largest energy and exergy loss. The water-gas shift reaction and the large demand volume of H2 in SF are the main reasons that cause low efficiency of H2 generation system. The LCA is conducted following the ISO 14040 International Standards, and the total environmental impact of the HSE process is 2.56 E−11, which is much smaller than 9.31 E−11 of the BF-BOF process. The energy consumption and CO2 emission of the HSE process are 9.08 GJ/t and 1079.56 kg/t, achieving a 53.75% of energy saving and a 47.45% of CO2 emission reduction when compared with the BF-BOF process. The HSE process proposed in this work is hoped to be helpful in the realization of low-carbon development of the iron and steel industry.

Keywords: Hydrogen generation; Steelmaking; Energy; Exergy; Life cycle assessment; Decarbonization (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:241:y:2022:i:c:s0360544221031716

DOI: 10.1016/j.energy.2021.122922

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