Modelling and optimization of a heat integrated gasification process

Abstract In this study, an iteration optimization is performed based on the Gibbs free energy minimization approach. Further, simultaneous optimization of a heat integrated gasification process is presented. The study shows how heat integration can improve the overall efficiency of a gasification process. We formulated a mathematical model which simultaneously optimizes the operating parameters and its interaction via heat integration among the hot syngas, steam generation and the feed preheat. This allows the model to simultaneously maximize the cold gas efficiency and also minimize the Gibbs free energy. The model also combined gasification model with an energy targeting model that is able to handle processes with variable stream temperatures and flow rates.