Typical case of CO2 capture in Chinese iron and steel enterprises: Exergy analysis

Chao Feng, Rong Zhu, Guangsheng Wei, Kai Dong and Tao Xia

Applied Energy, 2023, vol. 336, issue C, No S030626192300154X

Abstract: The iron and steel industry is not only a major energy consumer but also a major CO2 emitter. Thus, this industry is now actively improving its energy utilization efficiency and reducing carbon emissions in the production process through process development, equipment upgrades, and CO2 capture and utilization. Based on typical CO2 capture and utilization cases in Chinese iron and steel enterprises, this study analyzes the exergy efficiencies and exergy losses of different CO2 capture processes, confirming that the main reasons for low exergy efficiencies and large exergy losses in such processes are the consumption of steam, electricity, and converter gas, and further analyzes the impacts of converter gas and steam recycling on the exergy efficiency of CO2 capture. The results show that the product exergy efficiency of the C-PRO-4 process is increased by 19.97% compared with that before recycling, and 21.35%, 24.4%, and 6.8%, respectively, compared with those of the C-PRO-1, C-PRO-2, and C-PRO-3 processes after recycling, providing data reference for improving energy utilization in CO2 capture.

Keywords: Exergy efficiency; CO2 capture; Exergy loss; Oxygen enriched combustion; Energy (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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DOI: 10.1016/j.apenergy.2023.120790

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