The effect of curvature on the surface tension of droplets and bubbles in both single and multicomponent systems is modeled using the basic equations from classical thermodynamics. The three expressions used in our work are the Gibbs adsorption equation for multicomponent systems, the relation between the surface tension at the surface of tension and the distance parameter , and the Macleod–Sug...

The main objective of this work was to study and to characterize cocoa butter and the binary system cocoa butter/supercritical carbon dioxide (SC-CO2). In this way, it was measured the density and the solubility of the heavy phase in equilibrium at high pressures at 40 and 50oC, as the density and compressibility of cocoa butter. The density measurements were done trough an autoclave with a sap...

sCO2 power cycle is the most investigated and promising technology for replacing conventional steam in CSP plants. Nevertheless, efficiency of strongly penalized by high ambient temperatures which are typical favourable locations. This paper focuses on a new working fluid cycles consists CO2 blended with C6F6. The addition C6F6 increases critical temperature allowing condensing up to 45 °C. cal...

This study developed a novel C-sharp (C#) programming language for the estimation of bubble point pressure (BPP) various hydrocarbon mixtures at equilibrium state. The methodology was based on vapor–liquid calculation using Peng Robinson equation state implementation, thermodynamic and Newton-Raphson’s method successive substitution unknown variables. equal fugacity constraint can be satisfied ...

• R1132(E) is a promising next-generation refrigerant with zero ODP and very low GWP. saturation pressures were measured between 240 K to the critical temperature. The pressure of was directly as 5172.5 ± 1.0 kPa. A Wagner-type equation optimized for pressures. acentric factor determined used in Peng-Robinson EoS. (trans-1,2-difluoroethylene, C 2 H F ) potential next generation be utilized air ...

Phasepy is a scientifically defined open-source package in python for computational thermodynamics. indeed calculates the interfacial properties and fluid phases equilibrium using an equation of state. In addition, enables scientists to optimize relevant parameters multicomponent vapor-liquid, liquid-liquid, or vapor-liquid-liquid mixtures. The can model continuous approach (combining cubic sta...

Using a synthetic method, the phase behavior of CO2 (1) + cyclooctane (2) binary system was for first time experimentally studied between 292.95 K and 373.55 K. In this temperature range, bubble- dew-point pressures, ranging from 13.2 to 183.4 bar were measured carbon dioxide mole fractions 0.1014 0.9701. A total 96 experimental data points acquired. The obtained using high-pressure cell by vis...