Phase equilibria in the ternary system (LiCl+Li2SO4+H2O) at T=308.15K and p=0.1MPa: Experimental data and predictions using the Pitzer model

SummaryIn the absence of published experimental data on phase equilibria in the ternary system Fe-Sb-S and on the stability relations of gudmundite (FeSbS) and berthierite (FeSb2S4) , some preliminary investigations on the upper stability limit of natural gudmundite are briefly described. On heating in vacuo, As-free gudmundite broke down between 269° and 288°C, an approximate upper stability limit of 280±10°C conforming to the stability relations of the associated phases.

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Measurement and Modeling of Phase Equilibria in Systems Containing Water, Xylose, Furfural, and Acetic Acid

10.31219/osf.io/qrebp ◽

2021 ◽

Author(s):

Nadia Galeotti ◽

Jakob Burger ◽

Hans Hasse

Keyword(s):

Experimental Data ◽

Acetic Acid ◽

Ternary System ◽

Phase Equilibria ◽

Solubility Limit ◽

Miscibility Gap ◽

Rich Phase ◽

Biotechnological Processes ◽

Solid Liquid ◽

System Water

Wood hydrolysates obtained in biotechnological processes are typically aqueous solutions that contain, among others, sugars, acetic acid, and furfural. Only little is known on the influence of the sugars on the phase equilibria in those mixtures. Therefore liquid-liquid equilibria (LLE), solid-liquid equilibria (SLE), and solid-liquid-liquid equilibria (SLLE) in the system (water(W) + xylose (X) + furfural (F)) were studied in the present work at 298.15 K and 333.15 K. Additionally, the LLE in the system (W + X + F + acetic acid (AA)) was studied at 298.15 K. The results show that, up to the solubility limit of xylose, adding xylose to mixtures of (W +F) hardly influences the width of the miscibility gap, and that there is practically no xylose in the furfural-rich phase. However, the miscibility gap in the ternary system (W + F + AA) is slightly widened by the addition of xylose. The experimental data on the phase equilibria from the present work were described using the NRTL model. The model describes the experimental data well.

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Thermodynamic re-assessment of the Al-Sn-Zn ternary system

Journal of Mining and Metallurgy Section B Metallurgy ◽

10.2298/jmmb190320036c ◽

2019 ◽

Vol 55 (3) ◽

pp. 439-449 ◽

Cited By ~ 1

Author(s):

T. Cheng ◽

L.-J. Zhang

Keyword(s):

Experimental Data ◽

Ternary System ◽

Phase Equilibria ◽

Experimental Phase Equilibria ◽

Calphad Approach ◽

Experimental Phase ◽

Ternary Interaction ◽

Self Consistent ◽

Comprehensive Comparison ◽

Good Agreement

In this paper, a thermodynamic re-assessment of the Al-Sn-Zn ternary system was performed by means of the CALculation of PHAse Diagram (CALPHAD) approach. The thermodynamic descriptions of the binary Al-Sn, Al-Zn, and Sn-Zn systems from the literature were directly adopted, and the newly reported experimental phase equilibria, enthalpies of mixing, and activities of Al in the ternary liquid phase were taken into account. A set of self-consistent thermodynamic parameters for the ternary Al-Sn-Zn system were finally obtained. A comprehensive comparison between the presently calculated phase equilibria/thermodynamic properties and the experimental data indicates that the present thermodynamic descriptions of the ternary Al-Sn-Zn system show very good agreement with most of the experimental data. The further direct comparison with the calculated results due to the previous assessment demonstrates that a significant improvement was achieved by the present assessment though fewer ternary interaction parameters were utilized.

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