Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Application of the Advanced Distillation Curve Method to the Aviation Fuel Avgas 100LL



Tara Lovestead, Thomas J. Bruno


We have recently introduced several important improvements in the measurement of distillation curves for complex fluids. The modifications to the classical method and apparatus provide for (1) a composition explicit data channel for each distillate fraction (for both qualitative, quantitative and trace analysis), (2) temperature measurements that are true thermodynamic state points that can be modeled with an equation of state, (3) temperature, volume and pressure measurements of low uncertainty suitable for equation of state development, (4) consistency with a century of historical data, (5) an assessment of the energy content of each distillate fraction, (6) trace chemical analysis of each distillate fraction, and (7) corrosivity assessment of each distillate fraction. The most significant modification is achieved with a new sampling approach that allows precise qualitative as well as quantitative analyses of each fraction, on the fly. We have applied this new method, the advanced distillation curve (ADC) method, to the measurement of rocket propellant, diesel fuels, gasoline, and jet fuels. In this paper, we apply the ADC method to low-lead aviation gasoline, avgas 100LL. We present the distillation curves, and track the composite enthalpy of combustion and the molar concentration of tetraethyl lead throughout the distillation.
Energy and Fuels


Avgas 100LL, aviation fuel, chemical analysis, distillation curve, tetraethyl lead


Lovestead, T. and Bruno, T. (2009), Application of the Advanced Distillation Curve Method to the Aviation Fuel Avgas 100LL, Energy and Fuels, [online], (Accessed March 2, 2024)
Created March 1, 2009, Updated October 12, 2021