Evaluation of by-product-gas utilization options for carbon reduction at an integrated iron and steel mill

Tingting Xu, Zhaoyi Huo, Wenjing Wang, Ning Xie, Lili Li, Yingjie Liu and Lin Mu

Energy, 2024, vol. 294, issue C

Abstract: The comprehensive utilization of steel mill by-product gases is an important method for achieving climate goals. In this study, a comprehensive model is proposed for analyzing carbon-emission reduction strategies of by-product gases comprehensive utilization system at an integrated iron and steel mill. The model is used to explore carbon-emission reduction performance applying blast furnace with top-gas recycling (TGR-BF) and carbon capture and storage (CCS) applications, as well as consequent influence on steam and power cogeneration system (SPCS) operation. Carbon-emission intensity, total emission reduction and unit reduction cost are used to evaluate the carbon reduction result of by-product gases comprehensive utilization system. The results of the study indicate that the upgrade of SPCS can achieve an emission reduction of 311,200 tCO2, and the carbon-emission intensity of the power and heat supply can be reduced by 0.14 tCO2/104 kWh and 0.02 tCO2/GJ, respectively. After TGR-BF technology is applied, the total emission reduction peaks at the top-gas recovery rate of 6%, which is 85,100 tCO2. The unit reduction cost is also minimized at the top-gas recovery rate of 6%. Sensitivity analysis indicates that the reduction of power price significantly reduces the unit reduction cost.

Keywords: Carbon-emission reduction; By-product gases; Steam and power cogeneration system (SPCS); Blast furnace with top-gas recycling (TGR-BF) (search for similar items in EconPapers)
Date: 2024
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:294:y:2024:i:c:s036054422400731x

DOI: 10.1016/j.energy.2024.130959

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