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Carbon mineralization is a natural process accelerated by human intervention, where CO2 chemically reacts with certain rocks (like basalt or peridotite) to form stable, solid carbonate minerals. This traps the carbon permanently, mimicking natural rock weathering but on a much faster timescale, often using waste products like mining tailings or industrial slags. Companies like CarbonBuilt, Carbfix, and the Carbon Capture and Conversion Project (C3P) are actively developing and deploying mineralization technologies. This technology is moving from advanced research to early commercial pilots, particularly for niche applications; Carbfix in Iceland has demonstrated the injection of CO2 into basalt formations, mineralizing 95% of injected CO2 within two years, as published in Science in 2016. Unlike traditional geological storage which relies on pressure and geological seals, mineralization chemically binds the CO2, making it inherently stable and leak-proof.
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Why It Matters
Carbon mineralization provides a permanent and inherently safe method for CO2 storage, crucial for addressing the millions of tons of industrial emissions contributing to global warming. In a world embracing mineralization, industrial sites and mining operations would become carbon sinks, turning problematic waste into valuable, inert materials, contributing to a cleaner atmosphere and stable climate. Cement and materials companies, as well as waste management industries, stand to gain, while traditional fossil fuel industries might face pressure to adopt cleaner disposal methods. The main challenges are identifying suitable reactive feedstocks at scale, optimizing reaction rates, and the energy required for processing. Significant commercial adoption is expected by 2035-2045, with Canada, Iceland, and the US leading research and pilot projects. An underappreciated consequence is the potential for new, carbon-negative building materials derived from these mineralized products.
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