Comparison and Selection of EMC/ERH Isotherm Equations for Drying and Storage of Grain and Oilseed

Wheat, shelled corn and rice are the most popular grown cereal grains and rapeseed (canola) is the most popular grown oilseed in the world. Thorough literature surveys reveal that a large number of publications contain EMC/ERH data for these grains and oilseed. From these publications, experimental data points are extracted, forming data sub-sets suitable for evaluating the isotherm equations. Moreover, these data points also form merged data sets that can be used for various applications. Some commonly used EMC/ERH equations are compared based on their ability to fit these data sub-sets, and the most appropriate equations are selected to fit the merged data sets that describe adsorption, desorption and average isotherms for the grains and oilseed. The best fitted equations provide a sound basis for future work on the drying and storage of wheat, shelled corn, rice and rapeseed.