Case study 1: surrogate generation for PSA, a dynamic process built in Dymola Pressure swing adsorption (PSA) is a cyclic dynamic process for gas separation. As to achieve the objective of net-zero 2050, PSA is regarded as a promising technology for CO2 capture from fossil fuel-based processes. Through continuously varying pressure, adsorption switches with desorption for all the process periods (Figure ). Eventually, PSA reaches a cyclic steady state (CSS), where consecutive cycles have the same profile. In this case, PSA is applied to capture the CO2 from the flue gas of a natural gas power plant.