Our portfolio

We work with a multidisciplinary group of top scientific experts to help us evaluate promising carbon removal technologies. You can explore our growing portfolio of projects below or review our selection process here, or read our purchasing perspectives.

53 total projects
Splash image for Leilac

Leilac

Leilac’s calcination technology uses indirect heating to convert abundant carbonate rocks, such as limestone, into an alkaline product with low carbon emissions. The process is compatible with renewable energy sources, captures CO₂ released from the feedstock, and prevents contamination from combustion gases. The resulting alkaline material can be used for carbon removal (via ocean alkalinity enhancement or direct air capture) or to mitigate local ocean acidification.

Track
R&D - 2026
Contracted tons
-
Location
Salisbury, UK
Splash image for SaltX

SaltX

SaltX builds electric arc calciners (EAC) which use plasma torches to heat limestone, converting it to high quality quick lime and releasing high purity CO₂ for storage. The plasma torch can generate heat at over 4,000℃ allowing a compact low-cost reactor. The quick lime is suitable for carbon removal uses like ocean alkalinity enhancement and mineral looping Direct Air Capture (DAC).

Track
R&D - 2026
Contracted tons
-
Location
Stockholm, Sweden
Splash image for Cella

Cella

Cella is advancing in-situ mineralization (ISM) in deep underground basalt formations, converting captured CO₂ into durable mineral carbonates. Their subsurface and monitoring technologies expand where geological storage is feasible while supporting durable, verifiable long-term carbon storage.

Track
Prepurchase - 2025
Contracted tons
3,212
Location
New York, NY, US
Pathway
Storage only
Storage subcategory
Geologic mineralization
Splash image for PRONOE

PRONOE

PRONOE designs and deploys standardized, automated water treatment units that connect to coastal industrial outflows to raise alkalinity and dissolved carbonate levels in seawater, enhancing the ocean’s local capacity to absorb CO₂. Their approach minimizes pH change to the marine ecosystem, tolerates variable feedwater and feedstock conditions, and handles acid waste streams to simplify deployment at coastal facilities.

Track
Prepurchase - 2025
Contracted tons
333
Location
Paris, France
Splash image for NULIFE

NULIFE

NULIFE GreenTech uses a process called hydrothermal liquefaction to efficiently transform wet and dry waste biomass—including from food processors, grain handlers, pulp and paper mills, and municipal biosolids facilities—into a bio-oil that is injected deep underground for permanent carbon removal.

Track
Offtake - 2026
Prepurchase - 2024
Contracted tons
122,775
Location
Saskatoon, Saskatchewan, CA
Delivered tons
1,228.9
Splash image for Reverion