Thermodynamics of water sorption in clay

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• 作者：Chemkhi ; Saber ; Zagrouba ; Fethi ; Bellagi ; Ahmed
• 关键词：Desorption isotherms ; Clay ; GAB model ; Thermodynamic ; Heat of sorption ; Sorption entropy
• 刊名：Desalination
• 出版年：2004
• 出版时间：August 15, 2004
• 年：2004
• 卷：166
• 期：Complete
• 页码：393-399
• 全文大小：454 K

文摘

Experimental data on desorption isotherms of three types of clay at different temperatures (40, 50 and 60°C) were determined using a static method. The results were fitted by the famous Guggenheim-Anderson-deBoer (GAB) model. The thermodynamic functions, differential heat of sorption, net integral enthalpy and entropy, were evaluated at several moisture contents. Heat of sorption decreased with the moisture content and the trend became asymptotic as the moisture content of 0.01 (d.b.) was approached.