Hydrogen should be prioritised for steel sector decarbonisation over other possible applications, the OECD says in a new report seen by Kallanish.
It notes that steel needs to compete with other industries in securing limited hydrogen resources, despite the gas being used in the steelmaking process being considered a high value application.
The report says that given its significant potential to reduce emissions by up to 90% in the steel industry compared to other sectors, its use in the steel sector is considered important. It therefore calls for the prioritising of green hydrogen supplies to the industry.
Current hydrogen production is limited, mostly based on fossil fuels, and mostly feeding production processes in other sectors. Renewable or green hydrogen is only available in very limited quantities.
Recent OECD estimates expect excess capacity to reach 630 million tonnes by 2026. This corresponds roughly to the amount of hydrogen-based steelmaking capacity that needs to come online to achieve net-zero goals by 2050 in the most ambitious decarbonisation scenarios for hydrogen-based steelmaking developments.
OECD figures show that a total of 164mt of direct reduced iron capacity is in the planning and construction phase until 2030, of which only 15mt (9.2%) is based on hydrogen. The vast majority is based on natural gas DRI, with some gradually switching to hydrogen as it becomes available for steelmaking.
The range of estimates for carbon neutral steelmaking by 2050 assign a prominent role for hydrogen-based DRI solutions. These range between 370-873mt, corresponding to 20-40% of the estimates for total production in 2050. With subdued global demand projections, the build-up of these capacities needs to be accompanied by the exit of emission-intensive facilities to avoid furthering excess capacity.
The organisation also notes the importance of hydrogen-based projects being located where they make most sense from a market perspective and in regions that are not plagued by excess capacity. The opportunity to use hydrogen in steelmaking should be balanced against other possible decarbonisation routes for the sector, it adds.
While hydrogen-based steelmaking currently faces significant cost and competitiveness challenges, these will likely subside in the future as the technology matures. Cost constraints of green hydrogen should also reduce as access to renewable energy improves and electrolyser costs diminish, it says.
Steelmakers may adopt gradual phase-in strategies to keep up with the pace of developments in green hydrogen markets. It also notes the role governments are playing in bringing hydrogen to the market, with many highlighting the role the fuel will play for the steel sector in their national hydrogen strategies.
It also warns that while the majority of DRI projects are built under the premise of using natural gas as a transition fuel, it is key that support provided is conditional upon the adoption of green hydrogen at a certain stage to ensure that carbon is not locked in.
Carrie Bone UK
