3. Rate based model
3.1. Model specification
For simulating the absorber, the RateFrac model is adopted. But for the stripper, the RadFrac model is adopted for the condenser and reboiler while the RateFrac model is adopted for other stages. In the RateFrac model, the Redlich–Kwong equation of state and the Electrolyte-NRTL method are used to compute properties of the vapor phase and liquid phase, respectively. The flow model is Countercurrent.