Simulation of an Integrated Gasification Combined Cycle with Chemical-Looping Combustion and CO2 sequestration

Chemical-looping combustion allows an integration of CO2 capture in a thermal power plant without energy penalty; secondly, a less exergy destruction in the combustion chemical transformation is achieved, leading to a greater overall thermal efficiency. This paper focus on the study of the energetic performance of this concept of combustion in an integrated gasification combined cycle power plant when synthesis gas is used as fuel for the gas turbines. After thermodynamic modelling and optimization of some cycle parameters, the power plant performance is evaluated under diverse working conditions and compared to a conventional integrated gasification combined cycle with precombustion capture. Energy savings in CO2 capture and storage has been quantified. The overall efficiency increase is found to be significant and even notable, reaching values of around 7%. In order to analyze the influence of syngas composition on the results, different H2-content fuels are considered.

Análisis energético de las centrales de ciclo combinado con gasificación integrada y combustión mediante lazo químico

La combustión mediante lazo químico permite una integración de captura de CO2 en una planta térmica de potencia sin penalización energética. Se alcanza una menor destrucción exergética, alcanzándose un rendimiento térmico idóneo. Este proyecto se centra en el estudio del rendimiento energético en una planta de potencia con gasificación integrada cuando la cámara de combustión de las turbinas de gas se sustituye por un sistema de combustión CLC. Después del diseño termodinámico y optimización de algunos parámetros del ciclo, el rendimiento de la planta de potencia es evaluado bajo distintas condiciones de trabajo y comparado con el que se obtendría en una planta de ciclo combinado convencional con gasificación integrada y captura pre-combustión. Abstract Chemical-looping combustion allows an integration of CO2 capture in a thermal power plant without energy penalty. A less exergy destruction in the combustion chemical transformation is achieved, leading to a greater overall thermal efficiency. This Project focus on the study of the energetic performance in a cycle power plant with integrated gasification when the chamber combustion is supplied by a combustion system CLC. After thermodynamic modeling and optimization of some cycle parameters, the power plant performance is evaluated under diverse working conditions and compared to a conventional integrated gasification combined cycle with pre-combustion capture.