Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 540719
Title Modeling the equilibrium moisture content of desorption and adsorption of yam (Dente)
Author(s) Amankwah, E.A.; Dsizi, K.A.; Straten, G. van; Boxtel, A.J.B. van
Source Agricultural Engineering International 20 (2018)1. - ISSN 1682-1130 - p. 184 - 192.
Department(s) Biobased Chemistry and Technology
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) Equilibrium moisture content - GAB - Sorption isotherm - Yam
Abstract

The experimental equilibrium moisture content of yam (Dioscorea rotundata; cultivar: Dente) at temperatures of 25°C and 50°C were determined at relative humidity from 0% to 95% employing the dynamic vapor sorption analyzer. Wet yam samples with about 68% initial moisture content were used, first for desorption and subsequently for sorption. Water activity decreased with increased temperature at constant equilibrium moisture content. The desorption and adsorption isotherms were fitted by the Guggenheim-Anderson-de Boer (GAB), Henderson, Halsey, Oswin, Smith, Brunauer-Emmett-Teller (BET) and Peleg models. On the basis of the fit the Peleg, GAB and Oswin models were most suitable for describing the observed data. When the focus is on drying, the GAB (3 parameters) and empirical Peleg model (4 parameters) performed best. Of these, GAB is preferable because it has fewer parameters, which, moreover, have a physical meaning.

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