Greenhouse gas control in steel manufacturing: inventory, assurance, and strategic reduction review

Greenhouse gas control in steel manufacturing: inventory, assurance, and strategic reduction review

(2024) 3:27 | Yibo Qian, Yuanzhe Li, Yu Hao, Tong Yu, Haoqian Hu
The global steel industry is a significant contributor to greenhouse gas (GHG) emissions, necessitating accurate GHG inventory practices and sustainable production methods. This mini-review examines current methodologies for GHG accounting in the steel sector, emphasizing the importance of transparent emissions data for effective climate change mitigation. The paper evaluates the traditional carbon-intensive blast furnace-basic oxygen furnace (BF-BOF) production route and contrasts it with innovative reduction initiatives, particularly those aligned with green steel production. Key advancements include electric arc furnace (EAF) technology, direct reduced iron (DRI) processes using green hydrogen, and carbon capture, utilization, and storage (CCUS) systems. The analysis highlights the challenges and opportunities these technologies face, including economic viability, scalability, and energy infrastructure readiness. Verification and validation of GHG inventories are crucial for credibility, especially in the context of evolving regulatory frameworks and stakeholder expectations. The review also discusses the materiality of reported emissions and the need for standardized and rigorous assurance practices. Case studies of ArcelorMittal and POSCO illustrate the design and implementation of reduction projects, showcasing the transition to more sustainable and environmentally friendly production methods. The paper concludes by emphasizing the importance of industry-wide collaboration, policy support, and technological advancements in facilitating the transition to green steel production.The global steel industry is a significant contributor to greenhouse gas (GHG) emissions, necessitating accurate GHG inventory practices and sustainable production methods. This mini-review examines current methodologies for GHG accounting in the steel sector, emphasizing the importance of transparent emissions data for effective climate change mitigation. The paper evaluates the traditional carbon-intensive blast furnace-basic oxygen furnace (BF-BOF) production route and contrasts it with innovative reduction initiatives, particularly those aligned with green steel production. Key advancements include electric arc furnace (EAF) technology, direct reduced iron (DRI) processes using green hydrogen, and carbon capture, utilization, and storage (CCUS) systems. The analysis highlights the challenges and opportunities these technologies face, including economic viability, scalability, and energy infrastructure readiness. Verification and validation of GHG inventories are crucial for credibility, especially in the context of evolving regulatory frameworks and stakeholder expectations. The review also discusses the materiality of reported emissions and the need for standardized and rigorous assurance practices. Case studies of ArcelorMittal and POSCO illustrate the design and implementation of reduction projects, showcasing the transition to more sustainable and environmentally friendly production methods. The paper concludes by emphasizing the importance of industry-wide collaboration, policy support, and technological advancements in facilitating the transition to green steel production.
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