Gasification Processes

Preface MODELING OF GASIFIERS: OVERVIEW OF CURRENT DEVELOPMENTS Numerical Modeling in Engineering CFD-Based Modeling of Entrained Flow Gasifiers Benchmark Tests for CFD Modeling GASIFICATION OF SOLIDS: PAST, PRESENT AND FUTURE Introduction Historical Background Types of Gasification Reactors Trends in Gasifier Development Derived Challenges for Research MODELING OF MOVING PARTICLES: REVIEW OF BASIC CONCEPTS AND MODELS Introduction Soft-Sphere Model Hard-Sphere Model CD AND Nu CLOSURE RELATIONS FOR SPHERICAL AND NON-SPHERICAL PARTICLES Literature Review Model Description Code and Software Validation Porous Particles Non-Spherical Particles SINGLE PARTICLE HEATING & DRYING Nonporous Spherical Particle Heating in a Stream of Hot Air Heating of a Porous Particle Spherical Particle Drying in a Stream of Hot Air Conclusions UNSTEADY CHAR GASIFICATION/COMBUSTION Introduction Modeling Approach Numerics & Code Validation Advices for Beginners Analytical Methods INTERFACE TRACKING DURING CHAR PARTICLE GASIFICATION Interface and Porosity Tracking for a Moving Char Particle 3D Interface Tracking for a Porous Char Particle in a Kinetic Regime Conclusions PSEUDO-STEADY-STATE APPROACH FOR CARBON PARTICLE COMBUSTION/GASIFICATION Particle-Resolved CFD Simulations: Spherical Particles Particle-Resolved CFD Simulations: Nonspherical Particles Conclusions Setup of Heterogeneous Reactions in ANSYS FLUENT PORE-RESOLVED SIMULATION OF CHAR PARTICLE COMBUSTION/GASIFICATION Introduction Model Assumptions and Chemistry Small Porous Particle: 90 ?m Large Porous Particle: 2mm 3D Simulations under Gasification Conditions Conclusions SUBGRID MODELS FOR PARTICLE DEVOLATILIZATION-COMBUSTION-GASIFICATION Subgrid Model for the Devolatilization/Combustion of a Moving Coal Particle Novel Intrinsic Submodel for Gasification of a Moving Char Particle NEW FRONTIERS AND CHALLENGES IN GASIFICATION TECHNOLOGIES Introduction Trends in Gasifier Design Future Gasifier Simulations Index