Solvent development in post combustion CO2 capture-Selection criteria and optimization of solvent performance, cost and environmental impact

The current paper gives an overview of the complexity of solvent development for post combustion CO2 capture. Absorption rate, capacity and temperature dependence of equilibria determine energy performance in an optimized process. Degradability may sometimes prevent otherwise promising solvents from being utilized at the energetically optimal operating conditions. Cost and environmental impact are additional properties that must be fulfilled if a solvent shall be qualified for deployment at industrial scale. The paper describes the importance of a stepwise, holistic approach and the access to a range of resources, including experimental facilities, advanced analytical methods and pilot plants as important premises. The paper summarizes solvent properties in 14 criteria that must be addressed.