44.01

44.01 is a carbon removal company whose process converts carbon dioxide into stable carbonate minerals — effectively new rock — by accelerating mineralisation, a naturally occurring reaction in which CO₂ and water react with certain rock types such as peridotite. The company presents this as a route to safe, scalable and permanent carbon dioxide removal.

The company describes five characteristics of its approach: safety (no adverse impact on the local environment, subsurface or water sources), speed (mineralisation completed in under a year), permanence (once mineralised, the CO₂ cannot be re-released), scalability (peridotite resources are described as amounting to trillions of tonnes across the Americas, Europe, Africa, Asia and Australasia), and affordability, with limited ongoing costs after mineralisation translating into a lower cost per tonne of CO₂ removed. The name 44.01 refers to the molecular mass of CO₂.

Founding story

The company took its name from 44.01, the molecular mass of CO₂, framing carbon dioxide as an opportunity to build a new industry supporting the energy transition, to repurpose existing skills and expertise, and to assist natural processes in addressing climate change.