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TRIMET to Power Recycling Furnaces with Hydrogen-Rich Coke-Oven Gases

© by Trimet

TRIMET Aluminium SE will soon use hydrogen-rich energy to power its recycling plant in Gelsenkirchen, Germany. Switching to this climate-friendly fuel is part of a basic conversion program under which the materials specialist is expanding its recycling plant for climate-neutral production in the long term.

The recycling plant is expected to start drawing hydrogen-rich energy gas from Uniper Energy Sales from the ArcelorMittal coking plant in Bottrop as early as September 2023 to generate process heat for its smelting furnaces. Since the coke-oven gas produced during coke production contains more than 60% hydrogen, it releases significantly less CO2 emissions than fossil fuels.

Cutting Emissions

TRIMET will use existing infrastructure to transport the environmentally-friendly energy source: the coke oven gas is transported through gas pipelines from Bottrop, around 15 kilometers away, to the Gelsenkirchen city port. Only the last 700 meters will require the installation of a new pipeline. This new fuel will save the company about 4,000 tons of CO2 annually at the Gelsenkirchen site, or around one-quarter of the carbon dioxide emissions currently generated. Consequently, this investment will enable the future use of hydrogen as a fuel, as long as it is commercially available.

“Demand for recycled aluminium will continue to rise in the future,” said Thomas Reuther, member of the Executive Board of TRIMET Aluminium SE. For that reason, we are continually making investments in capacity expansion and plant modernization. We would like to become the greenest aluminium recycling plant in Europe.”

The comprehensive expansion program includes further steps toward more sustainable production. Various resource and energy efficiency projects are being planned or have already been implemented. For example, all forklifts have been converted to electric power. Furthermore, TRIMET will use the waste heat from the smelting furnaces to generate electricity for its own use and also feed around 20 gigawatt hours into the public district heating network. Solar cells spanning an area of 3,000 square meters on the production and storage hall roofs will cover the site’s remaining electricity requirements, making the recycling plant self-sufficient in terms of its power supply.

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