Methane+neo-Pentane system: VLE measurements, modeling of the phase diagram including solid phases

2021 ◽  
pp. 106687
Author(s):  
Marco Campestrini ◽  
Alain Valtz ◽  
Salem Hoceini ◽  
Paolo Stringari
Keyword(s):  
Phase Diagram ◽  
Solid Phases

Calphad description of the Ge-Mn system

2014 ◽  
Vol 1642 ◽  
Author(s):  
Alexandre Berche ◽  
Jean-Claude Tédenac ◽  
Philippe Jund ◽  
Stéphane Gorsse
Keyword(s):  
Phase Diagram ◽  
Liquid Phase ◽  
Thermodynamic Properties ◽  
Gibbs Energy ◽  
Critical Review ◽  
Thermodynamic Description ◽  
Calphad Method ◽  
Review Of The Literature ◽  
Solid Phases

ABSTRACTThe germanium-manganese system has been experimentally studied but no Calphad description is available yet. After a critical review of the literature concerning the phase diagram and the thermodynamic properties, a thermodynamic description of the Gibbs energy of the phases is performed using the Calphad method. The liquid phase is described with an associated model and the variation to the stoichiometry of the solid phases is taken into account.

Phase Equilibrium Study at 220°C of Li+,Mg2+//Cl-, SiO32--H2O Systerm

2014 ◽  
Vol 1015 ◽  
pp. 544-547
Author(s):  
Jun Ma ◽  
Yong Zhong Jia ◽  
Yan Jing ◽  
Chao Zhang ◽  
Ying Yao ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Phase Equilibrium ◽  
Magnesium Hydroxide ◽  
Lithium Silicate ◽  
Theoretical Principle ◽  
X Ray Diffraction ◽  
X Ray ◽  
Equilibrium Study ◽  
Phase Equilibrium Study ◽  
Solid Phases

In this paper, phase equilibrium of Li+, Mg2+∥Cl-, SiO32--H2O system at 220°C was researched. The solid phases were characterized by X-ray diffraction (XRD). Lithium silicate, hectorite, karpinskite and magnesium hydroxide were observed as solid phases. According to the analysis of XRD, the phase diagram was obtained. The phase diagram could be used as the theoretical principle for synthesis of hectorite.

Sodium oxide-phosphorus(V) oxide-water phase diagram near 300.degree.C: Equilibrium solid phases

1979 ◽  
Vol 18 (11) ◽  
pp. 2947-2953 ◽  
Author(s):  
Peter Taylor ◽  
Peter R. Tremaine ◽  
M. Grant Bailey
Keyword(s):  
Phase Diagram ◽  
Sodium Oxide ◽  
Water Phase ◽  
Solid Phases

scholarly journals Phase diagram of the β-alanine – water binary system

2021 ◽  
Vol 21 (1) ◽  
pp. 44-47
Author(s):  
Dmitry G. Cherkasov ◽  
◽  
Varvara D. Parfenova ◽  
Keyword(s):  
Phase Diagram ◽  
Liquid Phase ◽  
Binary System ◽  
Temperature Range ◽  
Visual Polythermal Method ◽  
Solid Phases ◽  
First Time

The phase diagram of the β-alanine–water binary system was studied using the visual polythermal method and the method of time–temperature curves in а temperature range of -20–90°С. There is a eutectic equilibrium at -18.3°С in the system; the solid phases of this equilibrium are ice and individual β-alanine. For the first time, the composition of the liquid phase of the eutectic state was determined.

Phase Diagram of MgCl2-LiCl-Na2­SiO3-H2O System at 200°C and Synthesis of Hectorite

2011 ◽  
Vol 688 ◽  
pp. 201-206 ◽  
Author(s):  
Xiao Jie Yin ◽  
Yong Zhong Jia ◽  
Yan Jing ◽  
Ying Yao ◽  
Jun Ma
Keyword(s):  
Phase Diagram ◽  
Energy Dispersive Spectrometer ◽  
Molar Ratio ◽  
Lithium Silicate ◽  
Theoretical Principle ◽  
X Ray Diffraction ◽  
X Ray ◽  
Comprehensive Utilization ◽  
Solid Phases ◽  
Natural Brine

Phase diagram of MgCl2–LiCl–Na2­SiO3–H2O (MLSH) system at 200°C was reported. The phase diagram was designed according to the hydrothermal system in which hectorite was formed. The solid phases were characterized by X-ray diffraction (XRD) and energy dispersive spectrometer (EDS). Lithium silicate, hectorite and karpinskite were observed as solid phases. The presence of hectorite in solid phases was decided by the molar ratio of MgCl2 and Na2SiO3 in the system. When the Mg/Si molar ratio exceeded a certain value, little hectorite was formed even though there was a large amount of LiCl in the system. The reason may be that it was difficult for Li+ to replace the Mg2+ in the framework. As a versatile nanomaterial, hectorite could be synthesized using concentrated natural brine as starting materials by hydrothermal method at 200°C. The phase diagram could be used as the theoretical principle for synthesis of hectorite and comprehensive utilization of concentrated natural brine.

Calculation of the phase diagram for the system water-dimethyl sulphoxide

1983 ◽  
Vol 48 (7) ◽  
pp. 1936-1943 ◽  
Author(s):  
Ivan Horsák ◽  
Ivo Sláma
Keyword(s):  
Experimental Data ◽  
Phase Diagram ◽  
Dimethyl Sulphoxide ◽  
Published Data ◽  
Solid Phases ◽  
The Difference ◽  
Equilibrium Chemical Reaction ◽  
Equilibrium Chemical ◽  
Liquid And Solid Phases ◽  
System Water

Liquidus curves of the phase diagram for the system water-dimethyl sulphoxide (DMSO) have been calculated in such a way as to give a good fit to experimental data for the phase diagram. The calculation is based on the assumption of an equilibrium chemical reaction yielding DMSO.3 H2O, and on the relation for the excess Gibbs energy in a ternary system composed of the two starting components and their compound. The data for the temperature dependence of the difference in the heat capacities of the liquid and solid phases of the pure components in the supercooling region have been obtained by extrapolation of experimental data in the case of DMSO, and for water by adopting published data measured down to -40 °C and by estimating their further trend.

PVT and DTA Measurements on trans-4-n-Hexyl- (4'-Cyanophenyl)-Cyclohexane (6PCH) up to 300 MPa

1999 ◽  
Vol 54 (5) ◽  
pp. 281-286 ◽  
Author(s):  
M. Sandmann ◽  
F. Hamann ◽  
A. Würflinger
Keyword(s):  
Thermal Analysis ◽  
Phase Diagram ◽  
High Pressure ◽  
Differential Thermal Analysis ◽  
Phase Transitions ◽  
Melting Curve ◽  
Enthalpy Changes ◽  
Volume Entropy ◽  
Solid Phases ◽  
Specific Volumes

The phase diagram of trans-4-n-hexyl-(4'-cyanophenyl)-cyclohexane, (6PCH) has been established by high-pressure differential thermal analysis. Specific volumes are presented for temperatures between 300 and 370 K up to 300 MPa. The p,Vm ,T data have been determined for the nematic, isotropic, and (partly, in the neighbourhood to the melting curve) solid phases. Volume and enthalpy changes along the phase transitions have also been calculated. As previously, the p,Vm,T data were used to calculate the volume entropy for the nematic-isotropic transition. The molar volumes along the clearing line TNI (p) enabled us to calculate the molecular field parameter γ = ∂ln TNI/∂In VNI , being 4.1.

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