Arca develops technology to accelerate industrial mineralization, capturing atmospheric CO2 by reacting it with alkaline industrial waste materials. This process transforms waste streams into stable carbonate minerals, providing permanent carbon removal at gigatonne scale. The company operates within existing industrial sites to achieve climate impact with a minimal physical footprint.
Funding
$14.2M raised to dateRaised to date based on public sources. This may differ from the amount the company actually raised and is based only on what is publicly available on the internet.
MIFounders
Product
Problem
Industrial processes generate large volumes of alkaline waste, such as steel slag, that are typically landfilled or stored, representing both an environmental liability and a missed opportunity for carbon mitigation. At the same time, natural carbon mineralization of ultramafic rocks is too slow to meet urgent climate targets.
Solution
Arca accelerates the natural carbonation reaction by processing alkaline industrial waste and ultramafic rock to form stable carbonate minerals that permanently sequester CO₂. The technology is installed within existing industrial sites, leveraging the waste streams and infrastructure already present, which minimizes additional land use and capital costs. In pilot deployments, Arca achieved a ten- to twenty‑fold increase in mineralization rates compared with baseline geological processes. The resulting carbonate product is a solid, inert material that can be safely stored or used as a construction aggregate, turning waste into a climate solution.
Target Audience
Primary customers are heavy‑industry operators that produce large quantities of alkaline waste, such as steel manufacturers, mining companies, and mineral processing plants, as well as partners seeking to integrate carbon removal into existing production sites.
Features
- Proprietary reactor and process design that enhances CO₂ uptake rates in magnesium‑rich ultramafic rock and calcium‑magnesium industrial waste
- Integrated CO₂ capture loop that feeds captured CO₂ directly to the mineralization reactors, reducing transport emissions
- Modular plant architecture that can be retrofitted to existing steel mills, mines, and other heavy‑industry facilities
- Real‑time monitoring and control system to optimize reaction conditions and ensure consistent carbonate quality
- Production of market‑grade carbonate minerals suitable for use in construction or other industrial applications