Isothermal vapour−liquid equilibrium (VLE) for four binary systems involving R1234yf (R1234yf + R134a, R152a, R1233zd(E) and R1233xf) were measured at temperatures from 278.15 to 348.15 K. The experiments conducted by means of a “static−analytic” apparatus with phase analysis via gas chromatography, resulting uncertainties 0.6 K temperature, 8 kPa pressure maximum 0.007 vapour liquid mole fract...

the critical properties of a solute are required for modeling of the solubility by the equation of state. for many compounds, the critical properties are not available. so, group contribution method is utilized as a common method to estimate these properties. but, it leads to the consecutive errors in calculations of the solubility modeling. in this study, soave-redlish-kowang (srk) and peng-ro...

Previously authors have reported facts that nitrogen (N2) and oxygen solubilities in styrene is the same as those benzene divinylbenzene at 303 K. Though three compounds an atomic composition, (CH)n (n=6, 8 10), gas are thought to depend on number of aromatic carbons solution. Then, named it ‘a key group solubility’. In this research, was investigated for N2 solubility methyl methacrylate (MMA)...

The phase behavior of the CO2 (1) + 2,3-dimethylbutane (2) binary mixture has been experimentally studied between 293 and 373 K. Saturation pressures, ranging from 14.0 to 112.2 bar, were visually measured using a high-pressure cell at carbon dioxide mole fractions 0.20 0.93. 78 experimental points have measured: 67 bubble 11 dew points. Experimental results reveal that vapor-liquid critical lo...

Boiling point and bubble pressure in binaries with propane were measured for five compounds, 1-pentyne, cyclopentene, 1-hexyne, 2-hexyne, 1,5-cyclooctadiene, new sulfur-free odorants liquefied petroleum gas. The boiling was an ebulliometer under atmospheric pressure. experimental points 313.51, 313.76, 344.53, 357.59 424.02 K respectively. pressures a static apparatus at 303.15 K. also by synth...

O uso softwares como Microsoft Excel ou LibreOffice Calc para ensinar e exemplificar exercícios envolvendo modelos termodinâmicos é de fácil implementação em sala aula. Dessa forma, o objetivo do presente estudo foi avaliar a densidade dióxido carbono (CO2) estado supercrítico através 4 equações distintas (Peng-Robinson, Redlich–Kwong, Soave Redlich–Kwong van der Waals) dos parâmetros temperatu...