Moisture isotherms and heat of desorption of canola

Abstract

Hamid Reza Gazor

(Agricultural Engineering Research Institute.  POB: 31585-845 Karaj- Iran)

Abstract: Moisture desorption isotherms (EMC/ERH) of canola cultivar of option 500 determined at 30, 40, 50 and 60℃ using the standard gravimetric static method over a range of relative humidity from 11% to 81%.  The experimental desorption curves were fitted by four equations: modified Henderson, modified Chung–Pfost, modified Halsey and modified Oswin.  The modified Oswin model was found to be a better model to describe the desorption isotherms of canola.  The net isosteric heats of desorption of canola were determined from the equilibrium data at different temperatures.  The net isosteric heat of desorption of canola varied between 1.58–10.41 kJ/mol at moisture varying between 1.0%–12.5% d.b.

Keywords: canola, desorption isotherms, isosteric heat of desorption

Citation: Hamid Reza Gazor.  Moisture isotherms and heat of desorption of canola.  Agric Eng Int: CIGR Journal, 2010, 12(2): 79-84.