Prediction of thermodynamic properties using a modified UNIFAC model: application to sugar industrial systems

A modified UNIFAC model recently proposed in the literature is used to pred ict thermodynamic properties of aqueous solutions containing different suga rs, commonly used in food industries (D-galactose, D-mannose, D-xylose, mal tose and lactose), and for which the experimental information available is not sufficient in order to allow the application of UNIQUAC based models. M oreover, the new model is successfully extended to the prediction of the wa ter activity of industrial sugar solutions (e.g., honey and fruit juices), which is used in quality control of foods and processed foods. A comparison with the results obtained from another UNIFAC based model for these soluti ons is also presented. (C) 1999 Elsevier Science B.V. All rights reserved.