INIQUI   05448
INSTITUTO DE INVESTIGACIONES PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Optimization and dynamic mode control in a CO2 absorption process
Autor/es:
ENRIQUE TARIFA; JUAN P. GUTIERREZ; ERDMANN ELEONORA; ALE RUIZ LILIANA
Lugar:
Barcelona
Reunión:
Congreso; 10th World Congress of Chemical Engineering; 2017
Resumen:
In the industry, the CO2 absorption process is employed to remove the CO2 from the natural gas and adjust its composition to specified values. A common amine-based CO2 process consist of two main sectors. In an absorber column, the acid gases react with the amine solvent, sweetening the natural gas for sale. In the second sector, the rich amine solution is regenerated in a distillation column, cooled and recycled to absorption. However, the energy requirement for the regeneration of the solvent is considerably high and thus different optimization studies can be performed to minimize it.An MDEA-based absorption process will be considered, data will be obtained from a real natural gas plant, located in Argentina. Firstly, the steady state of the process will be modeled using the simulator Aspen Hysys v8.8. Then, different manipulated variables will be modified to identify the best operative point in terms of energy consume. For the purpose, an objective function, study cases and parametric analyses will be carried out in this stage. In the second part of the study, the conditions of the steady state simulation and the optimal values will be turned into two dynamics cases. For the matter, different calculus considerations, modifications to the flowsheet and equipment and valves sizing will be detailed. With the results, the tracking of different variables trough the time, the evaluation of the controllers? response and the level of the system stability will be analyzed and compared.In this study, the controllability analysis performed on the proposed industrial-scale MDEA absorption plant will evidence the velocity of recovery from most of the disturbances considered. The performance of the dynamic cases will expose the real possibilities to elaborate action plans and implement the new conditions to minimize the reboiler duty. In case of the energy reduction is possible, the energy efficiency of the system and operating costs will be favored, also it will be beneficial for environmental issues, such as the reduction of post-combustion gases emission.