Paebbl raises $25m for its CO2 sequestration tech

European startup Paebbl has secured $25m Series A funding to scale up its carbon capture technology that sequesters CO2 in building materials.

Paebbl technology stores captured carbon in building materials like concrete
Paebbl technology stores captured carbon in building materials like concrete - Paebbl

Founded in 2021, the company’s patented mineralisation process converts CO2 into CO3, mimicking natural rock weathering by combining water and ​​ground silicate rocks to produce a solid carbonate-based material. For every tonne of CO2 stored, around three tonnes of material is created. According to Paebbl, the silica-enriched mineral can be used as an inert industrial filler or as an ingredient in building materials, reducing the CO2 footprint of concrete by as much as 70 per cent. 

The past 18 months has seen the company move from gram-scale lab tests to a fully functioning pilot unit, producing 250kg of CO2-storing product daily. In May 2024 Paebbl reached its first full ton of sequestered CO2 in its mineral product and has cast the first concrete structures in the field with captured carbon. 

The latest funding round was led by investors including DACH-focused VC Capnamic, with participation from additional new investors including The Climate Pledge Fund (Amazon) and global construction and materials firm Holcim. Existing Paebbl investors 2050, Pale Blue Dot, and the Grantham Foundation also participated in the Series A raise.

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