Optimizing post-combustion CO2 capture in response to volatile electricity prices

► A model maximizes annual profits at a power plant with flexible CO2 capture. ► Amine scrubbing systems are operated in response to volatile electricity prices. ► Four plant configurations are studied under three 20-year CO2 price path scenarios. ► Flexibility is most advantageous if CO2 prices hover at $40-50/tCO2. ► Solvent storage lowers CO2 and raises profit, but capital cost can offset benefits.