CCUS Innovation 2.0 competition: Carbon sequestration in the built environment
Key documents from Imperial College London’s Carbon Capture, Usage and Storage (CCUS) Innovation 2.0 project.
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Carbon Sequestration in the Built Environment
Project lead: Imperial College, London
This project sought to further develop and scale a new carbon sequestration process which transforms waste carbon dioxide gas from industrial facilities into valuable construction products. Sequestered CO2 through this process has the potential to be lower cost than conventional approaches that rely on purification, liquification and offshore or geological storage. The carbon dioxide is stored in the form of a stable mineral which ensures no leakage over time. The patent-pending technology involves taking globally abundant magnesium silicate minerals and splitting this into magnesia and silica components. Through simple chemical processing two products of high purity are created: a) an amorphous silica that can be used as supplementary cementitious material (SCM) to facilitate low-carbon concrete and b) a concentrated magnesium solution in which CO2 from industrial flues can be sequestered to produce other construction materials.