Barriers to Steel Decarbonization

Carbon dioxide (CO 2 ) emissions are a leading contributor to global climate change, necessitating urgent mitigation strategies. While various metrics—such as total national emissions, per‐capita output, and historical contributions—define responsibility, determining accountability remains complex. Historically, emissions were minimal before the Industrial Revolution, but fossil fuel combustion has triggered an exponential rise in CO 2 levels since the mid‐20th century. The geographic distribution of emissions has shifted over time. The United States and Europe dominated emissions throughout the 20th century, but Asia's industrial expansion has altered global patterns. China now leads in emissions, followed by the United States and the European Union, with per‐capita outputs differing significantly across regions. Fossil fuel combustion, particularly through coal, oil, and natural gas, remains the primary source of emissions, with the energy sector alone contributing approximately 40% of global CO 2 output. In response, the renewable energy market has expanded, with nations setting ambitious decarbonization targets through investments in solar, wind, hydropower, and other clean technologies. Steel production is a key contributor to industrial emissions, with conventional blast furnace–basic oxygen furnace (BF–BOF) methods dominating global output. However, sustainability concerns have accelerated the shift toward electric arc furnace (EAF) technology and direct reduced iron (DRI) integration, which offer efficiency benefits and lower emissions. Despite efforts to decarbonize, the iron and steel sector continues to rely heavily on coal, complicating global climate goals. This industry accounts for 11% of global CO 2 emissions, making net‐zero commitments crucial for long‐term environmental sustainability. Major steel manufacturers have pledged to reduce emissions, with technological innovations such as hydrogen‐based production and carbon capture playing a vital role. Projects like SSAB's HYBRIT initiative highlight the feasibility of fossil‐free steel production, but economic, technological, and logistical challenges remain. Investment in infrastructure, electrolyzer technology, and hydrogen storage solutions is necessary to ensure long‐term viability. Policy interventions, including financial incentives and regulatory frameworks, will be critical in scaling green steel initiatives. The transition to low‐emission steelmaking requires collaboration across industries, technological innovation, and supportive policy frameworks. Nations worldwide are adopting various decarbonization strategies, prioritizing electric arc furnace (EAF) expansion, DRI integration, and the retrofitting of existing BFs. Hydrogen‐based steel production presents unique challenges but offers a pathway to achieving net‐zero emissions in the sector.