Effect of temperature on moisture sorption phenomena in agricultural products
The paper demonstrates importance of temperature influence on dehydration processes using drying model equations in introductory part and further presents results of water sorption tests of parsley leaves. Measurements were carried out under laboratory conditions in the temperature range of 10–40 °C...
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| Format: | Article |
| Language: | English |
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Mendel University Press
2005-01-01
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| Series: | Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis |
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| Online Access: | https://acta.mendelu.cz/53/4/0177/ |
| _version_ | 1818754195692453888 |
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| author | Jiří Štencl |
| author_facet | Jiří Štencl |
| author_sort | Jiří Štencl |
| collection | DOAJ |
| description | The paper demonstrates importance of temperature influence on dehydration processes using drying model equations in introductory part and further presents results of water sorption tests of parsley leaves. Measurements were carried out under laboratory conditions in the temperature range of 10–40 °C and relative air humidity from 30 to 100%. Moisture sorption isotherms were tested using a gravimetric dynamic method with continuous recording of changes in sample weight. Five mathematical models available in the literature (Chung-Pfost, GAB, Halsey, Henderson, and Oswin) were statistical evaluated. The Henderson equation was found to be a good model both for moisture adsorption and desorption. Part of the sorption isotherms measured in parsley leaves show the type II BET classification shape. An increase in temperature causes an increase in water activity for the same moisture content and, if water activity is kept constant, an increase in temperature causes a decrease in the amount of absorbed water. |
| first_indexed | 2024-12-18T05:19:24Z |
| format | Article |
| id | doaj.art-9ad06ecdfd4e4eba89e00768c58906b7 |
| institution | Directory Open Access Journal |
| issn | 1211-8516 2464-8310 |
| language | English |
| last_indexed | 2024-12-18T05:19:24Z |
| publishDate | 2005-01-01 |
| publisher | Mendel University Press |
| record_format | Article |
| series | Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis |
| spelling | doaj.art-9ad06ecdfd4e4eba89e00768c58906b72022-12-21T21:19:42ZengMendel University PressActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis1211-85162464-83102005-01-0153417718410.11118/actaun200553040177Effect of temperature on moisture sorption phenomena in agricultural productsJiří Štencl0Ústav zemědělské, potravinářské a environmentální techniky, Mendelova zemědělská a lesnická univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republikaThe paper demonstrates importance of temperature influence on dehydration processes using drying model equations in introductory part and further presents results of water sorption tests of parsley leaves. Measurements were carried out under laboratory conditions in the temperature range of 10–40 °C and relative air humidity from 30 to 100%. Moisture sorption isotherms were tested using a gravimetric dynamic method with continuous recording of changes in sample weight. Five mathematical models available in the literature (Chung-Pfost, GAB, Halsey, Henderson, and Oswin) were statistical evaluated. The Henderson equation was found to be a good model both for moisture adsorption and desorption. Part of the sorption isotherms measured in parsley leaves show the type II BET classification shape. An increase in temperature causes an increase in water activity for the same moisture content and, if water activity is kept constant, an increase in temperature causes a decrease in the amount of absorbed water.https://acta.mendelu.cz/53/4/0177/equilibrium moisture contentmodelingsorption isothermwater activity |
| spellingShingle | Jiří Štencl Effect of temperature on moisture sorption phenomena in agricultural products Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis equilibrium moisture content modeling sorption isotherm water activity |
| title | Effect of temperature on moisture sorption phenomena in agricultural products |
| title_full | Effect of temperature on moisture sorption phenomena in agricultural products |
| title_fullStr | Effect of temperature on moisture sorption phenomena in agricultural products |
| title_full_unstemmed | Effect of temperature on moisture sorption phenomena in agricultural products |
| title_short | Effect of temperature on moisture sorption phenomena in agricultural products |
| title_sort | effect of temperature on moisture sorption phenomena in agricultural products |
| topic | equilibrium moisture content modeling sorption isotherm water activity |
| url | https://acta.mendelu.cz/53/4/0177/ |
| work_keys_str_mv | AT jiristencl effectoftemperatureonmoisturesorptionphenomenainagriculturalproducts |