Background: The experimental measurement of the solubility a solute in given solvent is difficult task; hence, there need for reliable thermodynamic models its prediction. However, these require either molecular or group interaction parameters, which are not always available. Objective: objective present study to measure experimentally different solutes solvents selected from pharmaceutical foo...

The use of organic compounds in the European Union will in the future be regulated in accordance with the Council Directive 1999/13/EC of 11 March 1999 [1]. In this directive, any organic compound is considered to be a volatile organic compound (VOC) if it has a vapour pressure of 10 Pa or more at 20C, or has a corresponding volatility under the particular condition of use. Introduction of such...

Introduction Conclusions References Tables Figures Back Close Abstract Introduction Conclusions References Tables Figures Back Close Abstract Water activities of a series of polyol/water systems were measured with an AquaLab dew point water activity meter at 298 K. The investigated polyols with carbon numbers from n=2−7 are all in liquid state at room temperature and miscible at any molar ratio...

Water activities of a series of polyol/water systems were measured with an AquaLab dew point water activity meter at 298 K. The investigated polyols with carbon numbers from n=2–7 are all in liquid state at room temperature and miscible at any molar ratio with water. In aqueous solutions with the same molar concentration, the diols with lower molecular weight lead to lower water activities than...

This work focused on the interactions which occur between ester solvents and alcohol solutes. The alcohols selected ranged from the simplest alcohol (methanol) to C10-alcohols, and solubility predictions in the form of infinite dilution activity coefficients were made using the Modified UNIFAC Dortmund group contribution model. The model computation was set up on a Microsoft Excel spreadsheet s...

ThermoData Engine (TDE) is the first full-scale software implementation of the dynamic data evaluation concept, as reported in this journal. The present paper describes the first application of this concept to the evaluation of thermophysical properties for ternary chemical systems. The method involves construction of Redlich-Kister type equations for individual properties (excess volume, therm...

The phase equilibria for the extraction of aromatics from petroleum naphtha reformats (with a boiling range of 338-403K) using a mixed solvent of 1-cyclohexyl-2-pyrrolidone (CHP) and triethylene glycol (TEG) have been correlated using the universal function-group activity coefficients model (UNIFAC) group contribution model. The interaction parameters of CHP and TEG with different hydrocarbon g...

Biomass fast pyrolysis process is a technology that converts renewable solids into dense liquid. This study aims to apprehend the thermodynamic behaviour of Intermediate Liquid Compounds (ILCs) observed during biomass pyrolysis. The system studied was closed (20 mL) with air and mixture solution five components (Acetic acid (AA), hydroxyacetone (HX), phenol; furfural (FF) methanol) at 90°C unde...