| 초록 |
Post combustion CO2 capture (PCC) via absorption into amine solution is recognized as the most mature process for CO2 removal. In the PCC system, steam is extracted from power plants to provide regeneration energy required for stripping the CO2. The steam extraction causes the loss of technical and economical performance of the plant by reducing electricity generation. To reduce the negative effects of integrating, flexible operation and efficient control strategies that cope with variations in operation conditions are required. As first step to apply the strategies, dynamic behavior of the process corresponding to the disturbances is studied in this work. A prototype of dynamic model for the MEA-based capture process, including absorber, stripper and other utilities, is developed in gPROMS platform. Both rate-based and equilibrium-based models are introduced for the column models. Dynamic behaviors corresponding to various disturbances are predicted and analyzed using the proposed model. As a result, It was observed that dynamic responses for rate-based and equilibrium-based approaches are similar, although the rate-based model gives more accurate steady-state results. |
