Drying Characteristics and Moisture Diffusivity of Distillers' Spent Grains Dried in Superheated Steam

摘要

Distillers' spent grain pellets were prepared from material with an initial moisture content of 25% (wb). These pellets were dried in pairs using superheated steam at 120 degrees C in two orientations, horizontal and vertical. The drying characteristics, modeled by the Page equation, showed that there was a significant difference between orientations. The overall moisture diffusivity was calculated using a finite cylinder model based on Fick's law of diffusion accounting for a change in dimensions over the course of drying. The overall diffusivity values ranged from 4.08x10(-10) to 1.48x10(-8) m(2)/s.