Effect of NGCC intermittency on the performances and economics of CO2 capture with solvents

A lot of NGCC are operated in dispatchable mode. The plant runs at maximum load and is stopped when needed. If CO2 is captured on such power plant, the capture unit will work also in dispatchable mode. Start-up and shutdown events will affect the performances of the capture plant in term of energy consumption and CO2 capture rate.
In a recent study, we combined results from a campaign performed on the amine plant of Technology Center of Mongstad (TCM) with real operating data of two TotalEnergies power plants in France (Bayet and Toul NGCC) in order to evaluate the loss of performances of the CO2 capture plants due to the real dispatchable cycle of the power plants. We are now evaluating the economics of different scenarios for startup and shutdown by taking into account the cost of the input and outputs of this system: the natural gas, the electricity and the CO2 through the ETS system.
When the effects of the load factor and the intermittency mode will be well described, such study will enable to optimize and analyze prospective scenarios assuming future trends on prices and intermittency.