Thermophysical characterization of the powder resulting from the solar drying of the Moringa oleifera leaves

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AuteurGOUDJINOU, CODJO
AuteurAHOUANNOU, CLEMENT
AuteurCHAFFA, GEDEON
AuteurSOUMANOU, MANSOUROU MOHAMED
Date d'ajout2026-06-02T16:06:57Z
Date de disponibilite2026-06-02T16:06:57Z
Date de publication2017
ResumeThis paper presents the results of thermophysical characterization of the powder resulting from the solar drying of Moringa oleifera leaves. The desorption isotherms of the powder, are determined by the gravimetric static method. The models of B.E.T, Smith, Henderson, Iglesias and GAB are used for the smoothing of the experimental points. The Clausius-Clayperon and GibbsHelmholtz equation are used for the determination of thermodynamic properties. The isotherms obtained are with type II. The theoretical curves of GAB present a better similarity with the experimental curve at 55°C. The monolayer moisture content (Xm) is 6.32 and 7. 24 % at 30° C; 5.13 and 6.3% at 35 °C; 5.1 and 5.9 % at 45 °C; 4.22 and 4.66 % at 55 °C respectively for BET and GAB models. Isosteric and entropic heats are more important for low values of moisture content. The activation energy of desorption of the powder in the range of temperatures tested is -10.1009539 kJ/mol. Isokinetic temperature (Tβ) and the mean harmonic temperature (Thm) are respectively 301.2435K and 300.12342K and the free energy (ΔGβ) is 302.18 J/mol. The desorption process of the Powder is non-spontaneous and is done by controlled mechanisms enthalpic.
Autre identifiantBECDB-4076
URIhttps://dspace.uac.bj/handle/123456789/3908
Languefr
Fait partie deINTERNATIONAL JOURNAL OF ENGINEERING AND TECHNOLOGY
SujetMoringa oleifera
SujetThermophysical characterization
SujetDesorption isotherm
SujetThermodynamic Properties
SujetModeli
TitreThermophysical characterization of the powder resulting from the solar drying of the Moringa oleifera leaves
TypeArticle

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