The objective of this work is to study heat and mass transfer processes in a single biomass particle before its thermal degradation (< 200 °C) under high intense acoustic fields. For that, was developed a numerical code for Biot number higher that one, i.e., non-isothermal particles. The hypothesis is that an acoustic field alters the interaction between the gas and particles, proving drying. Acoustic fields can be obtained by using a loudspeaker inside a reactor. The proposed model predicts moisture mass transfer completion for different particle sizes and oscillating frequencies. The obtained data are relevant for plant conversion capacity and reactor's preliminary design.
Keywords renewable energy resources, numerical predictions, pyrolysis reactor, acoustic oscillations