Carbon Direct and Arca Announce Collaboration on Industrial Mineralisation Technology

Why It Matters

The partnership brings a scalable, low‑energy CDR solution to a sector that generates billions of tonnes of alkaline waste, unlocking a new revenue stream and helping meet corporate climate‑offset goals.

Key Takeaways

• Arca’s IMin tech accelerates mineralisation in mine waste at field scale
• Pilot with BHP removed net CO₂ efficiently over 18 months
• Microsoft signed 10‑year off‑take for ~300,000 tonnes of CO₂ removal
• 16.5 bn tonnes of legacy waste globally offer scaling potential
• Carbon Direct adds scientific and market expertise to co‑develop credits

Pulse Analysis

Industrial Mineralisation (IMin) represents a breakthrough in carbon‑dioxide removal by harnessing the chemistry of alkaline mine tailings. Unlike traditional carbon capture, which requires dedicated facilities and significant energy, IMin accelerates a natural mineral carbonation process that would otherwise take millennia. By injecting CO₂ into waste rock, the carbon is locked into stable minerals for over 10,000 years, delivering durable, verifiable credits that appeal to climate‑focused corporations. The recent BHP pilot proved the concept at scale, showing high removal efficiency without new infrastructure, a key advantage for heavy‑industry players seeking cost‑effective climate solutions.

The collaboration between Carbon Direct and Arca adds market credibility and technical rigor to the emerging pathway. Carbon Direct brings expertise in carbon accounting, verification standards, and off‑take structuring, ensuring that the generated credits meet the stringent durability and measurement criteria demanded by buyers like Microsoft and Frontier. This partnership also signals to investors that industrial mineralisation is moving beyond experimental labs into commercial pipelines, potentially unlocking financing for further deployments across mining hubs worldwide.

Globally, the mining sector produces roughly 3 billion tonnes of alkaline waste each year, with an additional 16.5 billion tonnes of legacy tailings awaiting remediation. IMin offers a dual benefit: it mitigates environmental liabilities while creating a new revenue stream through carbon credits. As corporations intensify their net‑zero pledges, demand for high‑quality, long‑term removal solutions will rise, positioning IMin as a strategic asset for both the mining industry and the broader carbon market. The technology’s low energy footprint and reliance on existing sites make it a compelling option for rapid scale‑up in the coming decade.