A heat transfer corrected isothermal model for devolatilization of thermally-thick biomass particles

An isothermal model is commonly used in computational fluid dynamics (CFD) modelling of biomass devolatilization in fluidized beds. However, the particle internal heat transfer, which is neglected by the isothermal model, influences significantly the devolatilization process for large biomass particles. To consider the effect of internal heat transfer, a heat transfer corrected isothermal model is introduced by comparing the differences between an isothermal model and a non-isothermal model. Two correction coefficients for external heat transfer, HT, and reaction rate, HR,i, were defined to correct the conventional isothermal model. The predictions of the heat transfer corrected isothermal model and the non-isothermal model were in good agreement with the experimental data for both thermally-thick (Biot Number, Bi≥1.0) and thermally-thin (Bi