Moisture sorption isotherms and thermodynamic properties of Jack pine and palm wood: Comparative study

被引：41

作者：

Ouertani, Sahbi ^{[1
]}

Azzouz, Soufien ^{[1
]}

Hassini, Lamine ^{[1
]}

Koubaa, Ahmed ^{[2
]}

Belghith, Ali ^{[1
]}

机构：

[1] Univ Tunis El Manar, Fac Sci Tunis, Dept Phys, Lab Energet & Transferts Therm & Mass, Tunis, Tunisia

[2] Univ Quebec Abitibi Temiscamingue, Chaire Rech Canada Valorisat Caracterisat & Trans, Rouyn Noranda, PQ, Canada

来源：

INDUSTRIAL CROPS AND PRODUCTS | 2014年 / 56卷

关键词：

Jack pine and palm wood desorption isotherms; Heat of desorption; Differential entropy; Enthalpy-entropy compensation theory; Spreading pressure; ENTHALPY-ENTROPY COMPENSATION; ADSORPTION-ISOTHERMS; WATER-VAPOR; TEMPERATURE; DESORPTION; MODELS;

D O I：

10.1016/j.indcrop.2014.03.004

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Currently, the impact of the controlled climate on moisture sorption isotherms of Jack pine and palm wood still remains unclear. The aim of this paper was to determine and compare the moisture sorption isotherms and thermodynamic properties of Jack pine and palm wood. The equilibrium moisture content of wood samples was measured within the range of 5 to 90% relative humidity at 50 degrees C, 60 degrees C, 70 degrees C and 80 degrees C. For both wood varieties, the equilibrium moisture content decreased with increasing temperature, however the effect of temperature is very remarkable for palm wood. The isosteric heat of desorption, the enthalpy and the entropy decreased with the increase of the moisture content. A good straight line correlated differential enthalpy and entropy, according to the enthalpy-entropy compensation theory. The spreading pressure decreased with increasing temperature at a given water activity, and increased with increasing water activity at a constant temperature. Predictive correlations of the two wood properties, based on experimental methods and physical laws, were established and compared. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：200 / 210

页数：11

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