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Abstract:

Several thermodynamic properties for maize, rough rice and wheat has been calculated using desorption isotherms available in the literature. It was obtained an analytical expression to predict the differential heat (isosteric) as function of moisture content using a three parameters equilibrium model, based on enthalpy-entropy compensation effect, which takes into account the effet of temperature. Two integral heats of sorption were calculated, the first from the slopes of the iso-spreading pressure lines and the second from integration of the differential heat. This last one was used to estimate the energy requirement to remove water from initial moisture content to different final moisture levels, which is useful in drying area. Finally it was calculated the differential and integral entropies of sorption as function of moisture content.

Registro:

Documento: Artículo
Título:Heats and entropies of sorption of cereal grains : A comparison between integral and differential quantities
Autor:Tolaba, M.P.; Suárez, C.; Viollaz, P.
Filiación:Departamento de Industrias, Fac. de Ciencias Exactas y Naturales, Ciudad Universitaria, 1428 - Buenos Aires, Argentina
Palabras clave:Calculations; Desorption; Drying; Enthalpy; Entropy; Estimation; Integration; Mathematical models; Moisture; Thermal effects; Cereal grains; Desorption isotherms; Differential heat; Enthalpy entropy compensation effect; Heat of sorption; Integral entropies; Iso spreading pressure lines; Three parameter equilibrium model; Thermodynamic properties; drying; grains; sorption
Año:1997
Volumen:15
Número:1
Página de inicio:137
Página de fin:150
DOI: http://dx.doi.org/10.1080/07373939708917222
Título revista:Drying Technology
Título revista abreviado:Dry. Technol.
ISSN:07373937
CODEN:DRTED
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07373937_v15_n1_p137_Tolaba

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Citas:

---------- APA ----------
Tolaba, M.P., Suárez, C. & Viollaz, P. (1997) . Heats and entropies of sorption of cereal grains : A comparison between integral and differential quantities. Drying Technology, 15(1), 137-150.
http://dx.doi.org/10.1080/07373939708917222
---------- CHICAGO ----------
Tolaba, M.P., Suárez, C., Viollaz, P. "Heats and entropies of sorption of cereal grains : A comparison between integral and differential quantities" . Drying Technology 15, no. 1 (1997) : 137-150.
http://dx.doi.org/10.1080/07373939708917222
---------- MLA ----------
Tolaba, M.P., Suárez, C., Viollaz, P. "Heats and entropies of sorption of cereal grains : A comparison between integral and differential quantities" . Drying Technology, vol. 15, no. 1, 1997, pp. 137-150.
http://dx.doi.org/10.1080/07373939708917222
---------- VANCOUVER ----------
Tolaba, M.P., Suárez, C., Viollaz, P. Heats and entropies of sorption of cereal grains : A comparison between integral and differential quantities. Dry. Technol. 1997;15(1):137-150.
http://dx.doi.org/10.1080/07373939708917222