CO2 is a major combustion product of coal which can contribute to global climate change. Current CO2 capture technologies for power generation processes including amine solvents, such as MEA, and CaO-based sorbent materials require very energy intensive regeneration steps which result in significantly decreased efficiency. In order to capture and sequester CO2 economically, there is a critical need for new materials to capture and release CO2 reversibly with acceptable energy costs. Compared with MEA, amino-acid related materials, which also contain amino-functional groups, have enhanced thermal stability and potentially lower separation costs. Based on our ab initio calculations and experimental measurements, amino-acids (e.g. arginine) and urea interacting with CO2 may form carbamic acids with high CO2 capture capacities. This process is distinct from MEA capturing CO2 in which carbamate anions and ammonium cations form. The presence of water in the flue gas may serve to enhance CO2 capture by these materials.

Amino-acid related sorbents for CO<sub>2</sub> capture applications

243rd National Meeting (2012)

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Amino-acid related sorbents for CO2 capture applications

Amino-acid related sorbents for CO₂ capture applications