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Sorption Isotherm of Hybrid Seed Corn

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:   No Citation available.
Authors:   M Soleimani, L Tabil, S Emami, M Shahedi
Keywords:   Isotherm curves, adsorption, desorption, sorption models, equilibrium moisture content, temperature, relative humidity

Isotherm data are used in solving heat and mass transfer problems that may be encountered during storage and drying processes as well as in dryer design. A study was performed on the basis of two factorial experiments for adsorption and desorption phenomena with three factors: hybrid (at 2 levels: three-way cross 647 and single cross 704), temperature (at 6 levels from 5 to 55C) and relative humidity (RH) (at 5 levels from 10 to 90%). Glycerol solutions at different concentrations were used to maintain RH at the aforementioned ranges. Statistical analysis showed that temperature, RH and hybrid affected the equilibrium moisture content in both adsorption and desorption phenomena. Comparisons between means showed that hybrid 704 had higher EMC values than hybrid 647 at the same conditions. Fitting of non-linear models (Henderson, Chung-Pfost and Oswin) to the experimental data was conducted. The Oswin model was the best model for adsorption and desorption curves for hybrid 704 and the adsorption curve for hybrid 647. The best model for desorption curve for hybrid 647 was the Chung-Pfost model.

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