A meta-analysis of thermo-physical and chemical aspects in CFD modelling of pyrolysis of a single wood particle in the thermally thick regime

Recent Advances in CFD Simulations of Multiphase Flow Processes with Phase Change

“…The phase change models for particle drying in thermal conversion reactors are mainly based on kinetic models (Arrhenius models), equilibrium models, and heat sink models (Table ). The first-order kinetic reaction model is the most widely used model for the evaporation of particles as it is convenient to incorporate into particle reactions . Equilibrium models, on the other hand, assume that there is always an equilibrium between the water present inside the pores of a particle and the water vapor in the surrounding environment.…”

“…As a result, CFD-DEM based on Eulerian–Lagrangian theory is gradually becoming a promising way to simulate biomass conversion . Different mass and heat transfer closures presented in section can be coupled into the CFD approach to describe particle drying, including kinetic models, equilibrium models, heat sink models, and hybrid models . This section presents the CFD simulation results of biomass drying, biomass thermochemical conversion (pyrolysis, gasification, and combustion) with drying, and single biomass particle conversion with drying.…”

“…Moreover, drying, devolatilization, gasification, pyrolysis, burning, and oxidization processes are always cross-correlated in a whole biomass-converting reactor. It will be helpful to understand the thermochemical conversion process by studying the inner particle behavior of a single biomass particle. , Li et al proposed an efficient fast-solving particle model for simulating the pyrolysis and combustion process of the fuel particle. It was concluded that conductive heat transfer inside the particle is essential for the drying and devolatilization process.…”

“…As a result, the phase change presents promising opportunities for temperature regulation in exothermal reactions, unclear reactors, electronics, vehicle batteries, solar collectors, buildings, and space missions Moisture in wet materials, such as biomass, coal, food, and pharmaceuticals, can hinder the thermochemical conversion reaction or accelerate spoilage. Consequently, the drying processes become essential for the preservation, transportation, and usage of these materials.…”

“…Moisture in wet materials, such as biomass, coal, food, and pharmaceuticals, can hinder the thermochemical conversion reaction or accelerate spoilage. Consequently, the drying processes become essential for the preservation, transportation, and usage of these materials.…”