Carbon dioxide capture, storage and utilization of anthropogenic CO2 released from large point sources burning fossil fuels, such as coal-fired power plants, and other industrial processes is required for mitigation of the adverse environmental effects. Numerous CO2 capture technologies are being developed for carbon capture, which include aqueous amines, and water-lean solvents. Aqueous amines solvent-technology is the most mature but has very high regeneration energy. To address this limitation, water-lean solvent systems are being developed in order to increase energy efficiency by reducing water content which have a higher heat capacity than organics. Our group’s effort is focused on accelerated development of advanced water-lean solvents, by combining molecular design, high throughput simulations to predict material properties, rapid synthesis and engineering. We have utilized this integrated approach to optimize our water-lean carbon dioxide binding organics liquids (CO2BOLs) solvent system. Combining key learning from our CO2BOLs and others chemistries, we have developed water-lean amines solvents that have fixed hydrogen bond orientation and exhibit dynamic acid base equilibrium. These liquid amines have the lowest CO2-rich viscosities and regeneration temperatures of any concentrated amine based solvent. These amines have high gravimetric capacities of CO2 (up to 20 wt%), with CO2-rich viscosities at 40 C below 300 cP, and thermal regeneration temperatures as low as 70-100 °C. The regeneration temperature can be lowered further to 60 °C by applying our group’s Polarity Swing Assisted Regeneration (PSAR) strategy.

Aminopyridine solvents as carbon dioxide capture agents

254th National Meeting (2017)

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