Because serpentinite and peridotite are not well suited for application in open-field environments, we conceived an industrial enhanced rock weathering method using a Gas–Solid Contact House, in which atmospheric air is forced to circulate inside a contained structure that prevents material from dispersing outside. Within this controlled environment, CO₂ mineralization is achieved solely through gas–solid contact between the atmosphere and pre-treated crushed rock.
Such an industrial closed-system approach makes it possible to eliminate, as much as possible, the uncertainties associated with natural environmental processes. As a result, carbon accounting can be performed in a simple, transparent, and highly reliable manner.
This approach is also expected to help drive broader adoption of enhanced weathering technologies that utilize open-system applications.
In gas–solid contact systems, basalt exhibits relatively slow mineralization rates. In terms of both mineralization kinetics and overall mineralization efficiency, serpentinite and peridotite offer significant advantages.