Evaluation of Convective Heat Transfer Inside the Pores of Pyrolyzed Wood using a \(\mu \) -CT Based Realistic Geometry

This work investigates the impact of the realistic porous structure of a biomass particle on the intraparticle convective transport. To this end, the porous structure of a biomass particle pyrolyzed at \(\textrm{300}^\circ \) C was characterized with X-ray microtomography and a realistic reconstruction of the microstructure was used for pore-resolved computational fluid dynamics (CFD) simulations of the flow. Based on these simulation results, local interfacial heat transfer coefficients in the pores were evaluated. This is a first step to derive macroscopic effective parameters that describe the intraparticle transport taking into account the complex anisotropic microstructure and morphology of the particle, as well as its evolution during the pyrolytic conversion process.