Regenerable solvents mediate accelerated low temperature CO2 capture and carbon mineralization of ash and nano-scale calcium carbonate formation

The dual need to remove CO2 from our emissions and treat alkaline industrial residues such as ash materials motivate the design of innovative pathways simultaneously capture convert into mineralized carbonates. Direct carbon mineralization is one approach that addresses mineralize emissions. Low solubility in water slow kinetics at ambient temperature have challenged direct residues. To address these challenges, use solvents enhance facilitate accelerated fly temperatures below 90 °C investigated. Calcium carbonate formation results inherent regeneration solvent. extents non-calcium content were 50% 51% waste 58% 62% 2.5 M sodium glycinate 30 wt% MEA solutions, respectively. experiments performed 50 for 3 h with partial pressure 1 atm a continuously stirred slurry environment 15 wt.% solid. Furthermore, nanoscale CaCO3 successfully synthesized dissolved calcium using CO2-loaded surfactants CTAB (Cetyl Trimethyl Ammonium Bromide). Surfactants bind surface regulate growth particles. These approaches demonstrate feasibility directly storing producing regenerable solvents.