A schematic process flow diagram visualising the capabilities of the simulation model is shown in Figure . The process pressurises carbon dioxide from feed, P in , to final pressure ,P out . A CO 2 stream, either pure or with impurities, delivered at a specified pressure and temperature (P in , T f eed ) enters a multistage compression process with n number of compression stages. In each stage, the fluid is compressed (isentropic) with a specified isentropic efficiency, ϵ. The discharge of each compression stage is cooled / inter-cooled to a specified temperature T in , which is the inlet of the succeeding compression stage. The pressure drop, dP , for each compression stage can be specified and the pressure drop is assigned to the intercooler. The number of stages is an integer equal to or larger than 1.