ISOTERMAS DE SORCIÓN DE TRES ETAPAS (t.s.s.) Y LOS MODELOS DE SORCIÒN RESTRINGIDA BET y GAB EN CEREALES ANDINOS KIWICHA (Amaranthus caudatus), QUINUA (Chenopodium quinoa Willd) y MAIZ (Zea mays L.)
ISOTERMAS DE SORCIÓN DE TRES ETAPAS (t.s.s.) Y LOS MODELOS DE SORCIÒN RESTRINGIDA BET y GAB EN CEREALES ANDINOS KIWICHA (Amaranthus caudatus), QUINUA (Chenopodium quinoa Willd) y MAIZ (Zea mays L.)
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DOI: https://doi.org/10.22533/at.ed.3174102425036
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Palavras-chave: Isotermas de sorción, cereales andinos, energía de activación
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Keywords: Sorption isotherms, Andean cereals, activation energy.
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Abstract: The main objective of the present work was to compare the isotherm t.s.s. (Three sorption stages) with the restricted BET and GAB models in Andean cereals: Kiwicha of the variety Oscar Blanco (Amaranthus caudatus), Quinoa of Junín Blanco (Chenopodium quinoa Willd), and Purple maize (Zea mays L.) at temperatures Of 18 ° C, 25 ° C and 30 ° C for the range of aw from 0.10 to 0.91. The comparison of these three isotherms was made taking into account the regression coefficient R2, the mean absolute error MEA and the standard error of moisture ESS, according to which it was observed that the model t.s.s Is better fitted than the GAB model for the three Andean cereals studied, due to its linearity in the range of 0.0 to 0.98 aw, thus confirming its theoretical justifications proposed by Timmermann (1989), On the other hand the thermodynamic constants of the proposed models were analyzed, being found that the parameters C and Xmdifieren minimally and the parameter presents similar values in the models GAB and t.s.s. , It was also evaluated the isosteric heat of sorption qst being observed that the purple corn requires more energy to remove the water at the level of the monolayer Xm, followed by quinoa.
- María Mercedes Carrasco-Colque
- Uber Quispe-Valenzuela
- Juan Callañaupa-Quispe
- Bernardo Jorge-Rojas
- Valerio Urbano Eleazar Roque-Illanez