{"id":1203,"date":"2026-01-19T09:46:48","date_gmt":"2026-01-19T09:46:48","guid":{"rendered":"https:\/\/www.tataconsultingengineers.com\/blogs\/?p=1203"},"modified":"2026-01-19T09:56:53","modified_gmt":"2026-01-19T09:56:53","slug":"towards-zero-carbon-steel-how-hydrogen-and-renewables-can-transform-the-industry","status":"publish","type":"post","link":"https:\/\/www.tataconsultingengineers.com\/blogs\/towards-zero-carbon-steel-how-hydrogen-and-renewables-can-transform-the-industry\/","title":{"rendered":"Towards Zero Carbon Steel: How Hydrogen and Renewables Can Transform the Industry"},"content":{"rendered":"<p>The iron and steel industry is one of the most challenging to decarbonise. A high\u2011impact pathway replaces carbon\u2011intensive reductants with hydrogen produced via electrolysis powered by renewable energy. Doing so cuts process emissions at the ironmaking stage, supports high\u2011purity output, and strengthens long\u2011term competitiveness. Barriers remain, cost, energy demand, infrastructure and metallurgy, requiring investment, innovation and enabling policy. This article outlines the main mitigation pathways (CDA, PI and CCU), explains the <strong>hydrogen\u2011based DRI \u2192 EAF<\/strong> route, sets out current benchmarks, highlights challenges and operating essentials, and spotlights momentum from leading industrial projects.<\/p>\n<p><strong>Steel\u2019s Emissions Reality and Why It Must Change Now<\/strong><\/p>\n<p>Fossil inputs, coal, gas and around 1,400 TWh of electricity, still underpin global steelmaking. Producing one tonne of steel emits roughly two tonnes of CO\u2082, accounting for about 8% of global emissions. Global output reached 1.95 billion tonnes in 2021 and could approach ~2.19 billion tonnes by 2050 as demand converges. Today, about 22% of steel is made via DRI and scrap\u2011based EAF routes; this could rise to ~50% by 2050, driven by the shift to low\u2011carbon pathways.<\/p>\n<p>The sector\u2019s three headline routes are <strong>Carbon Direct Avoidance (CDA)<\/strong>, <strong>Process Integration (PI)<\/strong> and <strong>Carbon Capture &amp; Usage (CCU)<\/strong>.<\/p>\n<ul>\n<li><strong>CDA:<\/strong> Hydrogen\u2011based direct reduction (H\u2082\u2011DR), hydrogen plasma smelting reduction (HPSR), molten oxide electrolysis (MOE), alkaline iron electrolysis (AIE).<\/li>\n<li><strong>PI:<\/strong> Gas injection into the blast furnace, iron bath reactor smelting reduction (IBRSR), high\u2011quality steelmaking with increased scrap, substitution of fossil energy carriers by biomass.<\/li>\n<li><strong>CCU:<\/strong> Converting captured carbon oxides into useful products, closing loops and reducing net emissions.<\/li>\n<\/ul>\n<p><strong>From Carbon to Hydrogen: The Chemistry That Changes the Outcome<\/strong><\/p>\n<p>In the conventional blast furnace route, coke reduces iron oxides to hot metal and generates large volumes of CO\u2082. Hydrogen can replace carbon monoxide as the reductant so that water vapour becomes the by\u2011product, dramatically lowering process emissions when hydrogen and electricity are renewable.<\/p>\n<p><strong>Hydrogen\u2011Based Green Steel Process Flow<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1206 size-large\" src=\"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-03-1024x487.png\" alt=\"\" width=\"1024\" height=\"487\" srcset=\"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-03-1024x487.png 1024w, https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-03-300x143.png 300w, https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-03-768x365.png 768w, https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-03-1536x730.png 1536w, https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-03.png 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<p>Renewable electricity \u2192 Electrolyser \u2192 Green H\u2082 \u2192 DRI shaft furnace \u2192 EAF \u2192 Finished steel.<\/p>\n<p><strong>Conventional (coke\u2011based) reduction<\/strong><\/p>\n<p>3C + 2Fe2O3 \u2192 4Fe + 3CO2<\/p>\n<p><strong>Hydrogen\u2011based reduction<\/strong><\/p>\n<p>Fe2O3 + 3H2 \u2192 2Fe + 3H2O<\/p>\n<p>FeO + H2 \u2192 Fe + H2O<\/p>\n<p>With green hydrogen and renewable power end\u2011to\u2011end, <strong>direct emissions can fall by roughly 90\u201395% at the ironmaking stage<\/strong>, while maintaining high product quality.<\/p>\n<p><strong>Inside a Hydrogen\u2011Ready Plant: <\/strong>DRI, EAF and the Power of Renewables<\/p>\n<ul>\n<li><strong>Hydrogen Reduction (DRI).<\/strong> Iron ore pellets are reduced in a <strong>shaft furnace<\/strong> using hydrogen, producing water vapour rather than CO\u2082.<\/li>\n<li><strong>Electric Arc Furnace (EAF).<\/strong> Reduced iron and scrap are melted using electricity\u2014ideally renewable\u2014to produce high\u2011quality steel.<\/li>\n<li><strong>Electrolysis for Green Hydrogen.<\/strong> Water is split into hydrogen and oxygen using renewable electricity.<\/li>\n<li><strong>CCS for Blue Hydrogen.<\/strong> Where hydrogen is produced from natural gas, <strong>carbon capture and storage<\/strong> can limit emissions as a transitional step.<\/li>\n<li><strong>Advanced Control Systems.<\/strong> Automation and sensors improve energy efficiency, process stability and safety in hydrogen\u2011rich environments.<\/li>\n<\/ul>\n<p><strong>Performance and Design Benchmarks<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1207 size-large\" src=\"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-02-1024x315.png\" alt=\"\" width=\"1024\" height=\"315\" srcset=\"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-02-1024x315.png 1024w, https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-02-300x92.png 300w, https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-02-768x236.png 768w, https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-02-1536x472.png 1536w, https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-02.png 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<p><strong>Reference plants already in operation:<\/strong><\/p>\n<ul>\n<li><strong>Baosteel Zhanjiang (China)<\/strong> \u2014 Energiron Zero Reformer; natural gas, coke oven gas and hydrogen.<\/li>\n<li><strong>voestalpine Texas LLC (USA)<\/strong> \u2014 2 MTPA Midrex.<\/li>\n<li><strong>Lebedinskiy GOK III (Russia)<\/strong> \u2014 1.8 MTPA Midrex.<\/li>\n<\/ul>\n<p><strong>What Improves and What\u2019s Hard: Benefits and Real\u2011World Constraints<\/strong><\/p>\n<ul>\n<li><strong>Benefits:<\/strong> Deep reductions in greenhouse gases; renewable\u2011backed production systems; new economic opportunities in hydrogen and advanced steelmaking.<\/li>\n<li><strong>Constraints:<\/strong> High cost of green hydrogen, significant energy requirements, infrastructure for production\/storage\/transport, high\u2011grade ore (&gt;65% Fe) availability, metallurgical control (e.g., embrittlement), and the need for enabling regulation and supportive markets.<\/li>\n<\/ul>\n<p><strong>Hydrogen DRI Enablers and Challenges<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1208 size-large\" src=\"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-05-1024x454.png\" alt=\"\" width=\"1024\" height=\"454\" srcset=\"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-05-1024x454.png 1024w, https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-05-300x133.png 300w, https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-05-768x340.png 768w, https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-05-1536x681.png 1536w, https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-05.png 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<p><strong>How Hydrogen Is Made: Grey, Blue and Green Pathways<\/strong><\/p>\n<p>Hydrogen for steel can come from different upstream routes with different carbon footprints.<\/p>\n<p><strong>Hydrogen Types (Grey vs Blue vs Green)]<\/strong><\/p>\n<p><strong> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1209 size-full\" src=\"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-01.jpg\" alt=\"\" width=\"800\" height=\"309\" srcset=\"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-01.jpg 800w, https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-01-300x116.jpg 300w, https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-01-768x297.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/strong><\/p>\n<p><strong>Projected Green Hydrogen Cost Reduction<\/strong><\/p>\n<p>Cost trajectory driven by falling renewable electricity prices and electrolyser capex; convergence is expected as scale and utilisation rise.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1210 \" src=\"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-content\/uploads\/2026\/01\/Blog-Infographics-04-1024x869.png\" alt=\"\" width=\"730\" height=\"620\" \/><br \/>\n<em>Source:<\/em> <em>IRENA\u2011derived trend<\/em><\/p>\n<p><strong>What It Takes to Run a Hydrogen\u2011Ready Operation Safely and Efficiently<\/strong><\/p>\n<ul>\n<li><strong>Hydrogen infrastructure.<\/strong> On\u2011site electrolysers or pipeline supply, compression and buffer storage, and safety\u2011led distribution networks.<\/li>\n<li><strong>Hydrogen injection.<\/strong> Proven options for blast furnaces and shaft furnaces can reduce CO\u2082 quickly without compromising metallurgical quality.<\/li>\n<li><strong>Process adaptation.<\/strong> Converters, ladles and handling systems must be engineered for hydrogen\u2011rich atmospheres, with robust safety protocols.<\/li>\n<li><strong>Renewable integration.<\/strong> Solar, wind and hydro should power electrolysis and EAFs to maximise abatement and stabilise operating costs.<\/li>\n<li><strong>CCU with hydrogen.<\/strong> Capturing and converting residual CO\u2082 streams helps legacy assets progress towards neutrality.<\/li>\n<li><strong>Supply\u2011chain orchestration.<\/strong> Coordinated partnerships among green hydrogen producers, OEMs\/EPCs and high\u2011grade ore suppliers are essential.<\/li>\n<\/ul>\n<p><strong>Momentum Signals from Industry: Sweden and Belgium Lead the Way<\/strong><\/p>\n<ol>\n<li><strong>Stegra (formerly H2 Green Steel), Sweden.<\/strong> Europe\u2019s first commercial, fully integrated green steel facility is under construction. It combines hydrogen production, DRI, EAFs and finishing lines, underpinned by more than 1.5 million tonnes of off\u2011take from 2025. The plant is designed for carbon\u2011neutral operations from inception and demonstrates that hydrogen\u2011based steel is both technically and commercially viable at scale.<\/li>\n<li><strong>ArcelorMittal Gent, Belgium.<\/strong> ArcelorMittal is advancing a multi\u2011year carbon\u2011capture pilot with Mitsubishi Heavy Industries\u2019 KM CDR Process\u2122 to deliver high\u2011purity CO\u2082 and partnering with D\u2011CRBN to plasma\u2011convert CO\u2082 to CO for reuse in steel and chemical production. A dedicated pipeline links the capture units to validate gas purity and integration\u2014illustrating how hydrogen pathways and circular\u2011carbon solutions can work in tandem at complex legacy sites.<\/li>\n<\/ol>\n<p><strong>What to Expect Through 2030\u20132040: A Clearer Path from Pilots to Scale<\/strong><\/p>\n<ul>\n<li><strong>Hydrogen as the principal reductant<\/strong> across new DRI assets, with broader use of scrap\u2011EAF.<\/li>\n<li><strong>Rapid growth<\/strong> of renewable capacity dedicated to hydrogen production.<\/li>\n<li><strong>Electrolyser efficiency gains<\/strong> and cost declines, improving hydrogen availability and economics.<\/li>\n<li><strong>Wider adoption<\/strong> of CCUS\/CCU at integrated sites that cannot switch immediately.<\/li>\n<li><strong>Premium markets<\/strong> for certified low\u2011carbon steel with robust traceability.<\/li>\n<li><strong>Deeper collaboration<\/strong> across energy, mining, technology and steel to secure ore quality and resilient supply chains.<\/li>\n<\/ul>\n<p><strong>Conclusion \u2014 The Case for Accelerating Hydrogen\u2011Based Steelmaking<\/strong><\/p>\n<p>Hydrogen\u2011based steelmaking offers a practical, high\u2011impact route to decarbonise a sector central to global development. While cost, energy and infrastructure challenges remain, the combination of renewable hydrogen, DRI \u2192 EAF, CCU\/CCS where needed, and strong supply\u2011chain partnerships can deliver decisive emissions cuts. With credible pilots, early commercial plants and rapidly improving economics, the path from pilot to scale is now clear\u2014placing green steel at the heart of a climate\u2011aligned, competitive industrial future.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The iron and steel industry is one of the most challenging to decarbonise. A high\u2011impact pathway replaces carbon\u2011intensive reductants with hydrogen produced via electrolysis powered by renewable energy. Doing so cuts process emissions at&#46;&#46;&#46;<\/p>\n","protected":false},"author":90,"featured_media":1212,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"ppma_author":[169,170,171],"class_list":["post-1203","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-company"],"acf":[],"authors":[{"term_id":169,"user_id":90,"is_guest":0,"slug":"subhajit-pan","display_name":"Subhajit Pan","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/99bdac0ab5b3afe9bcfe57e761b730d07674a67dcb4b6aea6be8ffb408d9a18f?s=96&d=mm&r=g","first_name":"","last_name":"","user_url":"","description":""},{"term_id":170,"user_id":91,"is_guest":0,"slug":"soumitra-saha","display_name":"Soumitra Saha","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/99bdac0ab5b3afe9bcfe57e761b730d07674a67dcb4b6aea6be8ffb408d9a18f?s=96&d=mm&r=g","first_name":"","last_name":"","user_url":"","description":""},{"term_id":171,"user_id":92,"is_guest":0,"slug":"jayabrata-chakraborty","display_name":"Jayabrata Chakraborty","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/99bdac0ab5b3afe9bcfe57e761b730d07674a67dcb4b6aea6be8ffb408d9a18f?s=96&d=mm&r=g","first_name":"","last_name":"","user_url":"","description":""}],"_links":{"self":[{"href":"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-json\/wp\/v2\/posts\/1203","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-json\/wp\/v2\/users\/90"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-json\/wp\/v2\/comments?post=1203"}],"version-history":[{"count":6,"href":"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-json\/wp\/v2\/posts\/1203\/revisions"}],"predecessor-version":[{"id":1216,"href":"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-json\/wp\/v2\/posts\/1203\/revisions\/1216"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-json\/wp\/v2\/media\/1212"}],"wp:attachment":[{"href":"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-json\/wp\/v2\/media?parent=1203"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-json\/wp\/v2\/categories?post=1203"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-json\/wp\/v2\/tags?post=1203"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.tataconsultingengineers.com\/blogs\/wp-json\/wp\/v2\/ppma_author?post=1203"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}