Aqueous amine based technology is the most mature method for post combustion carbon dioxide capture from flue gases. However the energy requirements are prohibitively high as a result of the high heat capacity of water. Water lean transformational solvent systems have been developed in order to reduce these energy penalties. These technologies include nano-material organic hybrids (NOHMs), task-specific, protic and reversible ionic liquids, and phase change solvents. As part of an ongoing program in our group we have developed new water lean transformational solvents known as CO2 binding organic liquids (CO2BOLs) which have the potential to be energy efficient CO2 capture solvents. Our first generation solvents have shown excellent CO2 uptake, acceptable mass transfer and favorable thermodynamic properties. In order to advance this technology to commercialization solvent viscosity and costs of materials needs to be lowered. High viscosity of the CO2-rich solvent limits the thermodynamic performance of these solvents. Lowering CO2-rich solvent viscosity without compromising the CO2 uptake capacity will enable full thermodynamic and kinetic potential to be achieved. Herein we present the design, synthesis and characterization of new classes of CO2BOLs with decreased viscosity derived from cheap readily available materials.

Synthesis and characterization of low viscosity carbon dioxide binding organic liquids for flue gas clean up

249th National Meeting (2015)

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