MEASUREMENT OF WATER ACTIVITY IN WATER UREA SUGAR AND WATER UREA POLYOL SYSTEMS, AND ITS PREDICTION BY THE ASOG GROUP-CONTRIBUTION METHOD

被引：16

作者：

CORREA, A

COMESANA, JF

SERENO, AM

机构：

[1] UNIV PORTO, DEPT CHEM ENGN, RUA BRAGAS, P-4099 OPORTO, PORTUGAL

[2] UNIV VIGO, DEPT CHEM ENGN, E-36200 VIGO, SPAIN

来源：

FLUID PHASE EQUILIBRIA | 1994年 / 98卷

关键词：

EXPERIMENTS; DATA; WATER ACTIVITY; GROUP CONTRIBUTION; ASOG; WATER; SUGARS; POLYOLS; UREA;

D O I：

10.1016/0378-3812(94)80118-5

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Water activities in aqueous solutions of urea with sugars (glucose and fructose) and polyols (glycerol, sorbitol and mannitol) at 25-degrees-C were measured with an electric hygrometer. Concentration ranges considered in this study reached. solubility limits for each solute. Correlation and prediction of water activities using the ASOG group contribution method required the use of a set of new specific groups. The interaction parameters for such new groups were calculated from new and previously published experimental data. Average percent deviations of 0.4% between experimental and predicted a(w) values were obtained.

引用

页码：189 / 199

页数：11

共 29 条

[1] MEASUREMENT OF LIQUID SOLID-PHASE EQUILIBRIUM IN TERNARY-SYSTEMS OF WATER SUCROSE GLUCOSE AND WATER SUCROSE FRUCTOSE, AND PREDICTIONS WITH UNIFAC [J].