Liquid-liquid equilibrium in binary and ternary mixtures containing formaldehyde, water, methanol, methylal, and poly(oxymethylene) dimethyl ethers

2016 ◽  
Vol 425 ◽  
pp. 127-135 ◽  
Author(s):  
Niklas Schmitz ◽  
Anne Friebel ◽  
Erik von Harbou ◽  
Jakob Burger ◽  
Hans Hasse
2008 ◽  
Vol 59 (5) ◽  
Author(s):  
Viorel Feroiu ◽  
Dan Geana ◽  
Catinca Secuianu

Vapour � liquid equilibrium, thermodynamic and volumetric properties were predicted for three pure hydrofluorocarbons: difluoromethane (R32), pentafluoroethane (R125) and 1,1,1,2 � tetrafluoroethane (R134a) as well as for binary and ternary mixtures of these refrigerants. Three cubic equations of state GEOS3C, SRK (Soave � Redlich � Kwong) and PR (Peng � Robinson) were used. A wide comparison with literature experimental data was made. For the refrigerant mixtures, classical van der Waals mixing rules without interaction parameters were used. The GEOS3C equation, with three parameters estimated by matching several points on the saturation curve (vapor pressure and corresponding liquid volumes), compares favorably to other equations in literature, being simple enough for applications.


2014 ◽  
Vol 20 (2) ◽  
pp. 79-85
Author(s):  
Lühong Zhang ◽  
Jing Zhang ◽  
Yongli Sun ◽  
Jiao Yan ◽  
Yuhua Liu ◽  
...  

2016 ◽  
Vol 2016 ◽  
pp. 1-21
Author(s):  
Mikhail Panfilov ◽  
Alexandre Koldoba

To describe phase equilibrium of mixtures, we develop a nonclassical approach based on using different equations of state for gas and liquid. We show that not all the types of EOS are admissible but only those which verify some specific conditions of consistency. We developed the mathematical theory of this new approach for pure cores and for mixtures, in presence and absence of capillary forces, which leads to explicit analytical relationships for phase concentrations of chemical components. Several examples of comparison with experimental data for binary and ternary mixtures illustrate the feasibility of the suggested approach.


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