While there are many naturally occurring minerals that are good candidates for CDR (e.g., olivines, wollastonites, serpentines), we are currently focused on industrially produced minerals, like steel slags, as they are less thermodynamically stable and so are more reactive than most natural minerals.

Road beds are an attractive use case for steel slag, as its use in roads is well accepted. The majority of the carbon removed precipitates in the roadbed as carbonate minerals, making MRV straightforward.  We are working to optimize carbon capture through changes in the steel slag mixtures, grain size, roadbed thickness, and moisture conditions.  In the future, we will also test new use cases for steel slags to further optimize their use as a CDR feedstock.

Optimizing the deployment of steel slag at scale to maximize the amount of carbon captured. 

Identifying the most reactive minerals available at scale for use in Carbon Dioxide Removal (CDR).