Moisture sorption studies on vacuum dried coconut presscake

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• 作者：Sujata Jena (1) sujata_jena@hotmail.com
  H. Das (2)
• 关键词：Sorption isotherm – Coconut presscake – Equilibrium moisture content – Isosteric heat of sorption
• 刊名：Journal of Food Science and Technology
• 出版年：2012
• 出版时间：October 2012
• 年：2012
• 卷：49
• 期：5
• 页码：638-642
• 全文大小：210.6 KB
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• 作者单位：1. College of Agricultural Engineering and Post Harvest Technology (CAU), Ranipool, 737135 Gangtok, Sikkim, India2. Department of Agricultural and Food Engineering, Indian Institute of Technology, Kharagpur, 721302 West Bengal, India
• ISSN：0975-8402

文摘

Moisture sorption isotherms of vacuum dried coconut presscake were determined at 25 °C, 30 °C, and 38 °C using a gravimetric technique. Sorption isotherms exhibited Type II behaviour. The effect of temperature on equilibrium moisture content was not significant (p?>?0.05). Three models available in the literature viz., GAB, BET, and Halsey models were fitted to the sorption data. Out of the three tested models, Halsey model best fitted the experimental data with a relative deviation percent below 10%. The net isosteric heat of sorption was determined from the equilibrium adsorption data using the Clausius–Clapeyron equation. Isosteric heats of sorption were found to decrease exponentially with increasing moisture content.