In order to conduct this study, they implemented a first-principles model of a rotating packed bed (RPB) in gPROMS Model Builder. They needed to make an accurate simulation to answer the key question whether it is necessary to have intercooling when highy concentrated monoethanolamine (70-80 wt%) is used as solvent in RPB absorber for CO2 capture. Not only a detailed RPB model was necessary but also an accurate thermodynamic representation of the mixture and for that they used the eNRTL model provided in Aspen Properties after regressing its parameters against available experimental data.
This study uses successfully the CAPE-OPEN interoperability between two advanced software tools, one for the unit operation model and one for the thermodynamic model.