Carbon removal buyers are pumped about industrial waste

minem summarises for you the essential news of the day, reviewed by our editorial team. Read the full piece on HEATMAP or enjoy below:

🗞️ Driving the news: Frontier, the Stripe-led carbon removal coalition, is prioritizing industrial waste pathways for large-scale carbon capture, including a $915 million commitment to technologies such as surficial mineralization, which leverages mine tailings and steel slag to lock CO₂ into stable carbonate minerals
• Early-stage startups like Arca and Karbonetiq are piloting approaches to accelerate carbon uptake and enable measurement, reporting, and verification (MRV) at scale

🔭 The context: Surficial mineralization captures CO₂ by exposing calcium- or magnesium-rich industrial byproducts to air, enhancing natural carbonation
• Unlike soil or ocean-based methods, the process occurs in confined, monitorable sites, simplifying MRV
• Startups employ techniques such as robotic tilling and mineral activation via microwaves to increase reaction rates and total carbon sequestered
• The goal is to generate proof-of-concept for large-scale commercial deployment and to secure off-take agreements with corporate buyers, including Microsoft

🌍 Why it matters for the planet: Industrial waste mineralization could sequester 10+ gigatons of CO₂ annually at $80–$120 per ton, providing one of the lowest-cost, scalable carbon removal pathways
• By repurposing existing mining and steel waste, the method avoids new resource extraction, permanently locks atmospheric CO₂, and advances critical carbon drawdown strategies necessary to limit global warming

⏭️ What’s next: Frontier is establishing a Surficial Mineralization Hub in Quebec to enable pilot-scale tests and support startup access to feedstocks, lab space, and industrial partnerships
• Success at these demonstration sites could inform wider commercial adoption, scaling MRV systems, and building a sustainable industrial carbon removal sector

💬 One quote: “The beauty of surficial mineralization is twofold: abundant reactive rock and a closed-system approach with straightforward measurement, reporting, and verification.” – Hannah Bebbington Valori, Frontier

📈 One stat: 10 gigatons/year – potential CO₂ removal from the atmosphere using surficial mineralization at full scale, per Frontier estimates

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