ISHS Acta Horticulturae 811: VI International Congress on Cactus Pear and Cochineal
HYGROSCOPIC FEATURES OF CEREUS SQUAMOSUS FLOUR |
| Authors: | E.E. Lima, R.M.F. Figueirędo, A.J.M. Queiroz, A.S. Silva |
| Keywords: | facheiro, drying, isotherms |
| Abstract:
The moisture adsorption isotherms and the isosteric heat of adsorption for the facheiro (Cereus squamosus) flour dried at 60°C were determined in the present work. The isotherms of flour were obtained at the temperatures of 10, 20, 30 and 40°C, by means of gravimetric static method, using satured salt solutions. The GAB, Oswin, Halsey and D’arcy-Watt models were fitted to the experimental data by the nonlinear regression analysis method. The isosteric heat of adsorption was calculated by means of Clausius-Clayperon and Sopade and Ajisegiri equations. According to the results, the D’Arcy-Watt model presented the best fit and the Sopade and Ajisegiri represented the isosteric heat of adsorption. | |
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