Densities and Viscosities of the Ternary Mixtures of Decalin (1) + n-Hexadecane (2) + 1-Butanol (3) and Corresponding Binary Systems

Abstract

Active cooling by endothermic hydrocarbon fuels (EHFs) is considered as a practical approach to deal with the thermal management problem of hypersonic aircrafts. As a typical component of EHFs, decalin is usually thermally stable while it is apt to coke and has poor combustion performance. n-Hexadecane, a normal alkane with a relatively high H/C ratio, can effectively improve the combustion performance of EHFs, and 1-butanol has remarkable anticoking properties. As a fundamental work for fuel design, decalin, n-hexadecane, and 1-butanol were selected as model compounds to construct a surrogate fuel system, which was used to investigate the effects of composition and condition on its thermophysical properties. Densities (ρ) and viscosities (η) of the ternary system of decalin (1) + n-hexadecane (2) + 1-butanol (3) and corresponding binary systems were measured at temperatures T = (293.15 to 333.15) K and pressure p = 0.1 MPa. The excess molar volumes (V m E ) and the viscosity deviations (Δη) of the mixtures were calculated and fitted to several semi-empirical equations. The tendencies of V m E and Δη with composition and temperature were discussed from intermolecular force and molecular size, respectively.

Measurement and Modelling of Excess Molar Volume and Excess Enthalpy of n-tridecane or n-tetradecanewithdecalin By Application of PFP Theory

“…These interactions can significantly affect properties such as boiling point, vapor pressure, and heat of vaporization, which are crucial in the design and operation of chemical processes and systems. Therefore, a thorough understanding of the molecular interactions in a mixture is necessary for the development of accurate thermodynamic models and the design of efficient and safe industrial processes [9][10][11].…”