Good natural material found to sequester Carbon really well when fractured

 

Peridotite dunite, an igneous rock, that contains less than 45% silica, has been found to be able to sequester large amounts of carbon when the rock is recently fractured. In the experimental study Catalina Sanchez Roa and other researchers from Lamont-Doherty Earth Observatory, Columbia University used a triaxial deformational apparatus to facture the rock samples and show that the permeability of the rock to carbonation increased significantly. This is the first recorded experimental evidence of reaction-driven fracture during carbon mineralization and its role in maintaining permeability at advanced stages of the process. These results confirm that the carbon mineralization process can be self-perpetuating through reaction-driven cracking (at least at the local scale), a process that is fundamental to upscaling engineered carbon mineralization as an efficient, and safe method for CO2 storage.

Photo B Navez



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