Thermodynamic Analysis of Biomass Gasification Using Aspen Plus: Comparison of Stoichiometric and Non-Stoichiometric Models

The gasification process involves several reactions that occur simultaneously and are interrelated by independent variables. Simulation tools can help us to understand the behaviour predict efficiency final composition of products. In this work, two thermodynamic equilibrium models developed in Aspen Plus® software were assessed: a non-stoichiometric model based on feedstock most probable compounds expected from results using minimisation Gibbs free energy stoichiometric set chemical considered as relevant describe process. Both validated with experimental data bubbling fluidised bed semi-pilot scale gasifier pine kernel shells (PKS) feedstock. influence temperature, ratio (SR) steam biomass (SBR) analysed. Overall, predictions gas parameters showed better agreement results. Our point out significance an accurate description producer for biomass.