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 411767
Title Evaluation of the Free Volume Theory to Predict Moisture Transport and Quality Changes During Broccoli Drying
Author(s) Jin, X.; Sman, R.G.M. van der; Boxtel, A.J.B. van
Source Drying Technology 29 (2011)16. - ISSN 0737-3937
Department(s) Systems and Control Group
Food Process Engineering
FBR Food Technology
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) polymer-solvent systems - self-diffusion - coefficients
Abstract Moisture diffusion in porous broccoli florets and stalks is modeled using the free volume and Maxwell-Eucken theories. These theories are based on the mobility of water and concern the variation of the effective diffusion coefficient for a wide range of temperature and moisture content during product drying. Mass and heat transport, shrinkage, and vitamin C degradation during drying of broccoli are simulated by a spatial model. The effective diffusion coefficient varies strongly with product moisture content and temperature. Vitamin C degradation is high at moisture contents around 2 kg water/kg dry matter. The influence of the size of broccoli on the drying rate is evaluated for several types of broccoli florets and stalks
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