RETRACTED: Experimental Study of Soybean Drying in a Fluidized Bed Dryer and Simulation of Heat and Mass Transfer Processes using Luikov Model

Abstract

Soybean was used in fluidized bed drying tests, after rehydrating to 22%[d.b.] by adopting two methods: the first is by adding distilled water, while the second is by adopting the gravimetric method. Drying of soybeans was performed using a fluidized-bed dryer under air temperature conditions between 40°C and 60°C and with an air mass flowrate between 0.034 kg.s-1 and 0.010 kg.s-1. In the second part of this study, Luikov's mathematical model was adopted to model and predict the heat and mass transfer phenomena that occurred during the fluidization processes. The experimental results obtained showed that the grains remoistened by the gravimetric method gave the highest drying rate of 0.0098 (kg water.kg-1.s-1) and the highest germination rate of 88%, with a minimum percentage of cracked grains of 7%. This study selected the gravimetric method for better re-humidification of soybeans and optimized temperature to 40 °C for efficient drying in fluidized-bed dryers.