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[Vapor-liquid equilibria for multicomponent organic solvents]
Toru Ishidao1, Sumiyo Ishimatsu, Hajime Hori
1Department of Environmental Management I, School of Health Sciences, University of Occupational and Environmental Health, Yahatanishi-ku, Kitakyushu 807-8555, Japan.
Journal of UOEH
|October 9, 2004
Summary
This study estimates vapor-liquid equilibrium for multicomponent organic solvents using the Universal Quasichemical Functional Group Activity Coefficient (UNIFAC) model. The model accurately predicts vapor concentrations crucial for workplace safety and environmental control.
Area of Science:
- Chemical Engineering
- Physical Chemistry
- Environmental Science
Context:
- Workplace exposure to mixed organic solvents necessitates understanding vapor-liquid equilibrium.
- Accurate prediction of vapor concentrations is vital for occupational health and safety.
- Existing methods may lack precision for complex solvent mixtures.
Purpose:
- To estimate vapor-liquid equilibrium for multicomponent organic solvents.
- To validate the Universal Quasichemical Functional Group Activity Coefficient (UNIFAC) model for these systems.
- To provide a reliable method for calculating equilibrated vapor concentrations.
Summary:
- The study employed the UNIFAC model to calculate activity coefficients for multicomponent organic solvent mixtures.
- Vapor-liquid equilibrium data, including vapor fraction and concentrations, were predicted for two-, three-, and four-component systems.
- Calculated values demonstrated good agreement with reference data for toluene-methanol, o-xylene-methanol, and thinner formulations.
Impact:
- Provides a validated tool for predicting hazardous vapor concentrations in industrial settings.
- Enhances the ability to implement effective environmental controls for mixed solvents.
- Contributes to improved occupational safety standards in industries using organic solvents.