Volatility of Mixtures of JP-8 with Biomass Derived Hydroprocessed Renewable Jet Fuels by the Composition Explicit Distillation Curve Method

Abstract

In this paper, we apply the composition explicit distillation curve method to mixtures of JP-8 with hydroprocessed aviation fuels made from camelina (a genus within the flowering plant family Brassicaceae), from castor seed (Ricinus communis), and from waste brown grease used with the Fischer–Tropsch process. For the camelina fuel, the departures (with respect to JP-8) in volatility and in enthalpy of combustion are significant for mixtures with 25 and 50% (v/v) in JP-8. Mixtures with only 10% camelina fuel (v/v) show relatively minor departures. In all cases, the departures (with respect to JP-8) are to lower temperatures (higher volatility) and lower molar enthalpy of combustion. Mixtures of castor based fuel with JP-8 show essentially no departures in volatility or molar enthalpy of combustion up to the 40% distillate volume fraction. Subsequent to this distillate volume fraction, departures are very apparent, with mixtures showing lower volatility and higher molar enthalpy of combustion with higher volume fractions of castor based HRJ. Mixtures of the brown grease based fuel show departures to lower volatility and to higher molar enthalpy of combustion (with respect to JP-8) as the volume fraction of the brown grease SPK increases.