Turbulent Mass Transfer Model For Simulating Protein Desorption In Liquid-Solid Circulating Fluidized Bed Risers

An integrated model, namely the two-equation turbulent model, is introduced to simulate mass transfer in a liquid-solid circulating fluidized bed (LSCFB) riser. Protein desorption is simulated and the proposed model is validated. The protein concentration profiles simulated with this model agree well with published experimental results. This model enables direct determination of turbulent mass diffusivity, removing the need to empirically guess a constant turbulent Schmidt number for simulating mass transfer in a turbulent flow. This model is useful when the turbulent mass diffusivity is not available for simulating mass transfer in an LSCFB riser. (C) 2021 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.