Study of Physiochemical Properties of Selected Military Fuels

Abstract

The purpose of the program was to determine certain physical and thermodynamic properties of four selected aircraft fuels. These fuels were MIL-F-5624C Grade JP-?, a MIL-F-25558 Grade RJ-l*, MIL-F-25656 Grade JP-6-H, and Decalin, a commercial hydrocarbon mixture of the cis and trans isomers of decahydronapthalene. Specific properti'!s evaluated were: 1. Equilibrium solubility of air, nitrogen and thane in the JP-4 and RJ-l fuels. 2. Effect of dissolved air, nitrogen, and ethane on the viscosity of the JP-4 and RJ-1 fuels. 3. Effect of dissolved ethane on density of the JP-4 and RJ-1 fuels. 4. Effect of pressure level, agitation rate, and rate of pressure change on the evolution rate of air and ethane from the JP-4 and RJ-l fiels. 5. Thercodynamic propnrties of each of the four test fuels including spocific heats, enthalpy, and entropy. 6. Vaporization characteristics of each of the test fuels Including vapor pressure, equilibrium vaporization curves, minimum reflux curves, variation of vapor molecular weight during minimum reflux distillations, and variation of density during minimum reflux distillations. 7. Variation of liquid density as a function of temperature. 8. Literature survey correlation compilation for the determination of physical and thermodynamic properties of petroleum fuels.