A Swiss biomethane facility is set to supply biogenic CO2 for permanent geological storage beneath the Danish North Sea.
The cross-border chain would move liquefied CO2 by road, rail and ship-linked logistics through Switzerland, Germany and Denmark.
Carbon removal credit sales are expected to underpin the project, although the exact commercial start date has not been independently confirmed.
A Swiss biomethane facility is being positioned at the start of a cross-border carbon removal chain extending to the Danish North Sea.
The planned system would capture biogenic carbon dioxide in Niederwil, in Switzerland’s Aargau canton. Operators would then liquefy the CO2, transport it across Europe and permanently store it in an offshore geological reservoir in Denmark.
The project applies bioenergy with carbon capture and storage. The technology combines biomass-based energy production with permanent storage of the resulting biogenic carbon. When emissions accounting criteria are met, the process can generate carbon removals.
Trade publication Bioenergy-news reported details of the project on September 2. However, no independent official statement confirming the exact commercial launch date has been identified.
Three companies divide the Swiss operations
The Niederwil site divides the production and capture process among three entities.
Recycling Energie AG operates anaerobic digestion of agricultural and food waste. That process produces raw biogas.
Regionalwerke AG Baden, then upgrades the biogas into biomethane and injects it into the gas grid.
A joint venture between the two companies, CO2 Energie AG, operates the facility responsible for capturing and liquefying the resulting biogenic CO2.
Philippe Lehmann leads CO2 Energie AG while also overseeing the CO2 and eGas division at RWB.
The structure reflects an increasingly specialized carbon management market. Energy production, carbon capture, transport and permanent storage can involve different companies operating across several jurisdictions.
That creates both commercial opportunities and governance challenges. Contracts must allocate responsibility for emissions accounting, custody transfers, storage performance and carbon credit integrity.
CO2 travels across three countries
After liquefaction, the carbon would leave Niederwil by road and move to a Swiss rail terminal.
Rail transport would carry the material across Germany to a northern port. A further road segment would then connect the shipment to a Danish North Sea port.
HOYER Group is coordinating the multimodal logistics. Project developer Airfix has described the arrangement as an early European example of a complete cross-border biogenic CO2 transport chain.
Airfix worked with South Pole on commercial arrangements supporting the value chain.
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Denmark’s Greensand project would provide permanent storage for the captured CO2. INEOS Energy operates the offshore storage development alongside Harbour Energy and Danish state-owned investment fund Nordsøfonden.
Captured carbon is injected into a depleted reservoir beneath the North Sea seabed. The geological formation underwent technical assessment as part of the storage project’s investment process.
Carbon credits underpin project economics
The commercial model relies heavily on certified carbon removal credits.
The Climate Cent Foundation has reportedly agreed to pre-purchase a significant share of the project’s future removals. Certification would be handled through Switzerland’s Federal Office for the Environment, according to the developer.
The Migros Pioneer Fund and Carbon Impact also provided early financial support.
For corporate buyers, such structures are becoming increasingly important as the carbon removal market moves toward longer-term procurement contracts. Advance purchases can provide developers with bankable revenue while giving buyers access to limited removal capacity.
The project also sits within Switzerland’s broader climate policy framework. The country’s Climate and Innovation Act establishes a national objective of reaching net-zero greenhouse gas emissions by 2050.
Cross-border projects add another layer of complexity. Regulators and buyers need clarity over monitoring, verification, liability and the treatment of removals across national accounting systems.
For European carbon management, the Niederwil-to-North Sea route illustrates how that market could develop. Capture sites may sit hundreds of kilometres from suitable geological storage.
Building a viable removal industry will therefore depend not only on capture technology, but also on transport infrastructure, storage regulation and credible long-term demand.
The proposed Swiss-Danish chain brings those elements together. Its next test will be moving from reported commercial plans to independently confirmed operations at scale.
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