Advances In Two-Fluid Model CFD Simulation For Fluidized Bed Gasifier

Abstract

For sustainable development to overcome the world environmental problems, use of biomass for renewable energy generation is one of the most prominent solutions. The gasification processfor biomass degradation using gasifiers is one of the most promising techniques. For designing an efficient system there is a need of comprehensive analysis of heat and mass transfer processes in gasifier. Computational Fluid Dynamics (CFD) simulations are an invaluable tool to analyze the efficiency, accuracy and micro level optimization of all processesinvolved in gasification. This review delves into the advancements in Computational Fluid Dynamics (CFD) simulations utilizing a two-fluid model for fluidized bed gasifiers. The paper highlights the importance of accurately representing gas compositions, species concentrations, and devolatilization processes within the reactor. The study has focused on use of CFD model to incorporate tar generation, comprehensive devolatilization procedures, and various reaction mechanisms for heterogeneous and homogeneous reactions. The study involves the comparison of different biomass types under varying operational parameters revealed insights into gasification processes. The review highlights the predictive capabilities of the two-fluid model by integrating advanced sub-models for interfacial momentum, particle interactions, and heat/mass transport. The integration of multi-scale simulation methods offers a comprehensive approach to capturing key aspects of gas-solid flow dynamics. Overall, this review paper contributes to the optimization of fluidized bed reactor design and the understanding of complex gas-solid interactions in industrial applications.