Green Steel Revolution: The Growing Role of Hydrogen in Steelmaking Innovation
Key Ideas
  • The steel industry is rapidly adopting hydrogen and electric ironmaking technologies to reduce carbon emissions and enhance sustainability.
  • Hydrogen-based green steel output could potentially reach 46 million tonnes by 2035, with investments from major steelmakers driving this transition.
  • Various hydrogen-based methods like H2-DRI, fluidised bed reactors, and HSPR are being explored to reduce hydrogen demand and pave the way for cleaner steel production.
  • Electric ironmaking techniques like MOE and aqueous-phase electroplating offer hydrogen-free alternatives, supported by industry giants like BHP and ArcelorMittal.
The steel industry is undergoing a significant transformation to cut carbon emissions, with a strong focus on adopting hydrogen and electric ironmaking technologies. According to IDTechEx, hydrogen-based green steel production could see a substantial increase to 46 million tonnes by 2035, thanks to investments from key players in the steel industry and innovative startups. Notably, hydrogen-based direct reduced iron (H2-DRI) is leading the way in green steel production, with successful pilot projects like HYBRIT in Sweden and HBIS in China showcasing hydrogen's potential. While many green steel ventures are initially starting with natural gas before transitioning to low-carbon hydrogen, the timeline for this shift depends on cost efficiency and infrastructure development. Alternative approaches like fluidised bed reactors and hydrogen smelting plasma reduction (HSPR) offer unique pathways to reduce hydrogen consumption. Additionally, electric ironmaking methods such as molten oxide electrolysis (MOE) and aqueous-phase electroplating provide hydrogen-free options and are supported by industry giants like BHP and ArcelorMittal. Despite these promising advancements, the steel industry still faces significant challenges and will continue to rely on coal-based blast furnace infrastructure for the foreseeable future.
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