This work studies two binary mixtures of R1243zf + R1234yf and R245cb which can be possibly used as a long-term alternative refrigerant for heat pumps. We present critical property (critical temperature, pressure, density) vapor liquid equilibrium (VLE) binaries. The maximum extended uncertainties (k=2) are estimated U(T) = 0.21 K, U(p) 0.048 MPa, U(ρ) 6.4 kg/m3 measurement, 0.06 K 0.015 MPa bu...

The supercritical extraction process is a technique that has increasingly been applied in various industries recent years. Solubility determination the region key feature for this process. However, high expenses and time consuming experiments task obligates need modeling. In study, thermodynamic model proposed to correlate solubility of solid hydrocarbons, namely, 1-hexadecanol, 1-octadecanol, ...

A continuous flow apparatus was applied to measure the phase equilibrium at 523 K and 573 K. The performance of analysed with determination vapor pressures water temperatures ( T = 453 473 K). measured deviated from literature values less than 1 %. Vapor n -dodecane, -hexadecane phenol were 523–623 K) and, bubble point -dodecane + pure components compared values. Relative pressure value 2 % for...

Peroxisome-proliferator responsive element (PPRE) and nuclear factor-κB (NF-κB) response element have been found in the gene sequence of superoxide dismutase (SOD). This study determines the PPARs and NF-κB expression and SOD activity in damaged livers of rats with obstructive jaundice. Sprague-Dawley rats (n = 120) were randomly assigned into four groups: sham 7 days post-surgery (Sham 7), bil...

Evaluation of common compositional models and PVT correlations are carried out against field data for light crude oil from north Iraqi reservoirs. The reported the evaluation significant to Petroleum industry, as various international local companies operate in this region. comprehensive program MultiflashTM 7.2 is utilized, employing Peng-Robinson (1976) Redlich-Kwong-Soave (1972). formation v...

• We develop HLLC-type schemes for flow in ducts of variable cross-sectional area. The are developed general equations state. For two-phase simulations, the homogeneous equilibrium model is employed. tested on Riemann problems ideal gas and CO 2 . Including non-conservative term solver wave structure most robust. In this work, Harten-Lax-van Leer Contact (HLLC) approximate extended to through w...

Nowadays supercritical CO2 cycles are considered as a promising alternative to the traditional steam cycle for power block in CSP plants with aim of enhancing system efficiency and reducing costs. This work deals experimental characterisation blend working fluid transcritical cycle: addition C6F6 dopant increases critical temperature allowing condensing hot environment ambient higher than 40 °C...

Material of the paederine genera Domene Fauvel, 1873 and Lathrobium Gravenhorst, 1802 from the Dayao Mountains, southern China, is examined. Eight species are identified, three of them described previously and five undescribed. Four species are described and illustrated for the first time: Domenehei Peng & Li, sp. n., Lathrobiumjinxiuense Peng & Li, sp. n., Lathrobiumkuan Peng & Li, sp. n. and ...

asphaltenes are the n-pentane or n-heptane insoluble fractions of crude oil that remain in solution under reservoir temperature and pressure conditions. they are destabilized and start to precipitate when the pressure, temperature and/or composition changes occur during primary production. the precipitated asphaltene particles will then grow in size and may start to deposit onto the production ...