A model of a desorber for the recovery of aqueous monoethanolamine (MEA) solvent following the separation of carbon dioxide (CO2) from flue gas from a fossil fuel power plant is presented. This model is derived from a previously developed absorber model, by using the same rate-based stage and physical property models. The novelty of this modeling framework lies in the integration into a rate-based process model of the state-of-the-art SAFT-VR thermodynamic model, in which the physical and chemical interactions are treated simultaneously, assuming that the chemical reactions are at equilibrium. Such an approach reduces the amount of experimental data needed to model the interactions of the solvent with CO2. The implicit treatment of the chemical reactions in this formalism obviates the need to incorporate an enhancement factor or to use experimental data for the rate of reaction. The gPROMS software is employed to implement the desorber model and pilot plant data are used for the validation, without adjusting any model parameters. Very good predictions are obtained over a wide range of operating conditions.