Life Cycle Assessment and Environmental Impact Evaluation of CCU Technology Schemes in Steel Plants

Chaoke Yu, Yingnan Li, Lulin Wang, Yifan Jiang, Siyi Wang, Tao Du and Yisong Wang ()
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Chaoke Yu: State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China
Yingnan Li: Institute for Frontier Technologies of Low-Carbon Steelmaking, Northeastern University, Shenyang 110819, China
Lulin Wang: State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China
Yifan Jiang: State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China
Siyi Wang: State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China
Tao Du: State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China
Yisong Wang: State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China

Sustainability, 2024, vol. 16, issue 23, 1-17

Abstract: Greenhouse gas emissions are significant contributors to global warming, and steel enterprises need to find more efficient and environmentally friendly solutions to reduce CO 2 emissions while maintaining high process efficiency and low production costs. Carbon capture and utilization (CCU) is a promising approach which can convert captured CO 2 into valuable chemicals, reducing dependence on fossil fuels and mitigating climate change. This study uses life cycle assessment (LCA) to compare the environmental impacts of BF-BOF steel plants with and without CCU. When evaluating seven scenarios, including three carbon capture and two carbon utilization technologies, against a baseline, the results demonstrate significant environmental benefits from implementing CCU technologies. Although the activated carbon TSA route for CO 2 -based methanol production showed good environmental performance, its toxicity risks highlight the advantages of combining TSA with steel slag carbonation as a better non-toxic solution.

Keywords: industrial decarbonization; life cycle assessment; carbon capture and utilization; BF-BOF process steelmaking; carbon capture after combustion (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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