Physical Properties of Binary Mixtures of n-Dodecane and Various Ten-Carbon Aromatic Compounds (2-Methyl-1-phenylpropane, 2-Methyl-2-phenylpropane, 2-Phenylbutane, and 1,3-Diethylbenzene): Densities, Viscosities, Speeds of Sound, Bulk Moduli, Surface Tensions, and Flash Points at T = (293.15–333.15) K and 0.1 MPa

Abstract

Mixtures of n-dodecane with C 10 H 14 aromatic isomers (isobutylbenzene, sec-butylbenzene, tert-butylbenzene, and 1,3-diethylbenzene) were analyzed for density, viscosity, speed of sound, surface tension, and flash point. As the concentration of the aromatic component increased, densities, bulk moduli, and surface tensions increased, and viscosities and flash points decreased. Concentration increases caused the speed of sound of 1,3-diethylbenzene to increase monotonically, but for the other compounds, the speed of sound initially decreased before increasing to their maximum value. Excess molar volumes, V m E , and excess isentropic compressibilities were positive, and excess speeds of sound, c E , were negative, indicating non-ideal behavior. Viscosity deviations were negative for all mixtures, and excess molar Gibbs energies of activation for viscous flow did not differ statistically from zero. Mixtures of 1,3-diethylbenzene deviated from ideal mixture behavior the least, and tert-butylbenzene deviated from ideal mixture behavior the most. These mixtures alone would not be good surrogate mixtures for diesel and jet fuel because no mole fraction matched both viscosity and density. The addition of other compounds could remedy this problem.

Onosma mutabilis: Phytochemical composition, antioxidant, cytotoxicity, and acute oral toxicity

“…NF: compound not found. c References used to classify the nature of compound 1 (Molleti & Singh, 2015 ), 2 (Luning Prak et al., 2020 ), 3 (Schmidt et al., 2014 ), 4 (Prakasia & Nair, 2015 ), 5 (Vukic et al., 2017 ), 6 (Lim et al., 2015 ), 7 (Autian, 1973 ), 8 (Norris et al., 2006 ), 9 (Souza et al., 2020 ), 10 (Bikle, 2014 ), 11 (Babu & Jayaraman, 2020 ), 12 (Junwei et al., 2018 ), 13 (Lee, 2010 ). …”

Properties of Two-Component Mixtures of Isobutylcyclohexane (1) or tert-Butylcyclohexane (1) with n-Dodecane (2) or n-Hexadecane (2): Densities, Surface Tensions, Viscosities, and Speeds of Sound at 0.1 MPa and Various Temperatures

“…Previous studies provide details about the methods and the analytical standards used to calibrate and test the instruments used in the current study. − Measurements were made using a Kruss DS100 drop shape analyzer, Anton Paar SVM 3001 viscometer, and Anton Paar DSA 5000 M sound and density analyzer. Note that the DSA 5000 M used 3 MHz sound waves.…”

Pressure–Surface Tension–Temperature Equation of State for n-Alkanes

“…Surface tension plays a fundamental role in the injection and atomization of fuels in engines. 9 , 11 , 17 , 21 − 27 Thus, n -decane is chosen as a surrogate of jet fuels, and its surface tension influences this fuel’s characteristics. 17 In other cases, liquefied natural gas is used as a fuel, and then the values of the surface tension of alkanes at high pressures are needed to characterize it.…”