轻工学报2016，Vol.31Issue(6)：24-30,7.DOI:10.3969/j.issn.2096-1553.2016.6.004
冬瓜干制品吸附等温线与净等量吸附热研究
Research on adsorption isotherms and the net isosteric heat of dried products of Benincasa hispida
摘要
Abstract
The adsorption isotherms of dried products of Benincasa hispida at six temperatures (1 0 ℃,20 ℃, 30 ℃,40 ℃,50 ℃ and 60 ℃)over a range of water activities from 0.1 09 to 0.982 were determined based on the adsorption theory.The experimental data of dried products of Benincasa hispida were fitted by seven models.The optimal model used to describe the adsorption isotherms of dried products of Benincasa hispida was determined by comparing the coefficient of determination (R2 ),root mean square error (RMSE)and the residual sum of squares (RSS).The net isosteric heat was determined from adsorption isotherms data of dried products of Benincasa hispida at different temperatures.The results showed that the adsorption isotherms of dried products of Benincasa hispida exhibited type Ⅲ sigmoid shape.At the same water activity,as the tem-perature increased with the decrease of the equilibrium moisture content.The Peleg model was found to be the best for describing the adsorption isotherms of the dried products of Benincasa hispida.The net isosteric heat of adsorption decreased with the increase of equilibrium moisture constant,and approached to zero at high mois-ture content (about 50%).关键词
冬瓜干制品/吸附等温线/水分活度/平衡含水率/净等量吸附热Key words
the dried products of Benincasa hispida/adsorption isotherm/water activity/equili-brium moisture content/net isosteric heat分类
轻工纺织引用本文复制引用
李瑜,李娜,吴文江,侯春燕..冬瓜干制品吸附等温线与净等量吸附热研究[J].轻工学报,2016,31(6):24-30,7.基金项目
农业部公益性行业（农业）重大科研专项 （）
