Stegra’s green hydrogen plant in Boden moves forward at pace

Industry decarbonisation expert Stegra has announced that its green hydrogen plant located in Boden, Sweden is making significant progress.

With the four central electrolyser buildings nearing completion, installation of the process equipment that will produce green hydrogen, the lifeblood of Stegra’s green iron and steel plants, is moving forward at pace.

Piyush Mishra, who oversees construction and equipment installation at the green hydrogen plant said:  “The goal is to install one electrolyser per week.”

The first electrolyser equipment installed at Stegra's green hydrogen plant in Boden, Sweden. Image ©Stegra

The first steel was raised in late 2024, and just six months later, all four of the massive electrolyser buildings are nearing completion and the first process equipment has been installed.

The 20-megawatt electrolysers from thyssenkrupp nucera each measure 40 meters long and nine meters high. Using alkaline water electrolysis (AWE), they will split water into hydrogen and oxygen using 100 per cent renewable electricity, producing more than 100,000 tonnes of green hydrogen annually.

The green hydrogen will then be used to purify iron ore in the green iron plant. In a direct reduction process, the green hydrogen reacts with the oxygen in the iron ore, producing green direct-reduced iron that is then used to make green steel. The main by-product is water, rather than the large amounts of CO2 emitted in traditional ironmaking processes.

After looking at several technology options, Stegra chose AWE due to its robustness, maturity and reliability.

Hedvig Paradis, Global Head of Hydrogen Technology said. “We needed something that could reliably deliver over 700 megawatts, and AWE was the best solution. While some technologies offer more flexibility, we needed something that could deliver a reliable supply 24 hours a day.”

Today, the green hydrogen facility is dominated by the four electrolyser buildings. In the coming months, they will be joined by additional structures that will contain, among other things, an electrical substation, purifiers and compressors.  

Stegra’s first steel production lines will go live in 2026 using recycled steel scrap as raw material, with green hydrogen-based iron and steelmaking beginning shortly thereafter and a full-scale ramp in 2027. By 2028, the company aims to reach steady-state operations across the green hydrogen, green iron and green steel plants.

For more information, visit www.stegra.com.