Thermodynamics and vacuum distillation studies of liquid Al–Ga and In–Sn alloys

Activities of components in liquid Al-Ga and In-Sn alloys, the separation coefficients and vapour-liquid phase equilibrium in vacuum distillation were predicted using the molecular interaction volume model as a function of the activity coefficients. The results indicated that both Al and In are pref...

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Published inPhysics and chemistry of liquids Vol. 56; no. 4; pp. 452 - 464
Main Authors Odusote, Y. A., Jabar, J. M., Adelakun, A. O.
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis Ltd 04.07.2018
Subjects
Activity coefficients
Mathematical models
Molecular chains
Molecular interactions
Phase equilibria
Statistical thermodynamics
Tin base alloys
Vacuum distillation
Vapor phases
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Summary:Activities of components in liquid Al-Ga and In-Sn alloys, the separation coefficients and vapour-liquid phase equilibrium in vacuum distillation were predicted using the molecular interaction volume model as a function of the activity coefficients. The results indicated that both Al and In are preferentially volatilised into vapour phase while Ga and Sn remain in residue. Similarly, we found that both the mass fraction and the content of Al and In in vapour phase increase as distillation temperature increases such that when the content of Al is 0.005985 wt% and In is 0.004141 wt% in vapour phase, respectively, in liquid phase, it was 70 wt% at T = 1073 K for both. The calculated values of activity and activity coefficients at various temperatures are presented. Comparison of the predicted values with experimental data indicates good agreement, thus verifying from statistical thermodynamics viewpoint that the model is stable and reliable.
ISSN:0031-9104
1029-0451
DOI:10.1080/00319104.2017.1346095