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Senken and Carbonsate Strike Major Deal for Carbon Removal

In a landmark agreement announced on August 17, 2026, Senken has secured the largest biomass storage deal in Europe to date, partnering with the Berlin-based company Carbonsate. This multi-year contract is aimed at delivering 50,000 tons of permanent carbon dioxide (CO2) removal, set to take place between 2026 and 2028.

Background of the Agreement

The deal represents not just a significant milestone for both companies but also underscores a growing trend in the market towards more sustainable practices. The agreement marks the second-largest of its kind globally in the category of geological biomass storage, also known as biomass burial. This innovative approach prevents carbon bound in leftover wood from re-entering the atmosphere, offering an enduring solution to the climate crisis.

Commencing this year, the deliveries will take place in specially constructed underground chambers designed to store the wood securely, ensuring it neither burns nor decays, thus maintaining the carbon for centuries. According to industry experts, the need for permanent carbon removal far exceeds the current supply, with most companies vying for a limited pool of verified removal capacity.

Adrian Wons, CEO of Senken, highlighted the context of the deal, stating, "The demand for permanent CO2 removal already surpasses the available supply. The net-zero goals of companies are all targeting the same small pool of verified capacity. This gap will significantly shape the market in the coming decade."

Wons emphasized the importance of securing such long-term commitments to support European buyers in accessing credible removal solutions at predictable prices.

Significance of the Project

Johanna Bröll, co-founder, and CEO of Carbonsate, added that contracts like these provide project developers with the confidence to build capacities ahead of demand. "This agreement supports the expansion of our storage sites in Namibia and introduces a substantial new supply of verified CO2 removal with high integrity to the market."

It's important to note that the entire carbon removal market has managed to deliver approximately 1.5 million tons thus far, and this specific offtake agreement from Senken and Carbonsate accounts for around 4% of that total.

The uniqueness of biomass burial lies in its efficient operational model, which avoids the energy-intensive capture steps associated with direct air capture methods, thus offering a lower-cost solution while ensuring permanence. This makes biomass storage not just an environmentally friendly option, but also a financially viable one.

Who are Senken and Carbonsate?

Senken acts as a supply partner for CO2 certificates, delivering high-integrity certifications along with the necessary documentation to support claims during audits and public disclosures. Utilizing its proprietary Sustainability Integrity Index (SII) comprising over 600 data points, Senken rigorously assesses each certificate, rejecting 95% of the projects in the market that do not meet their standards. Among its clients are major European companies, including Deutsche Telekom, Vodafone, and DZ Bank.

Carbonsate specializes in developing biomass storage projects that deliver permanent CO2 removal by sequestering leftover wood in purpose-built underground storage chambers. Each storage site is supported by an individual monitoring, reporting, and verification (MRV) system, ensuring compliance with the Puro.earth standards through independent verification.

In conclusion, this agreement not only highlights the growing need for innovative carbon removal solutions but also opens the door for similar future collaborations in the field of sustainability. As the race towards net-zero targets intensifies, deals like that of Senken and Carbonsate will likely become a focal point in Europe’s response to combating climate change.