LAUSR

Oxygen consumption and deposition measurements of model fuel mixtures and real fuels are used to explore the roles that heteroatomic fuel species and their interactions play during fuel autoxidation. A range of temperatures, oxygen consumption regimes, and flow environments are employed to provide results applicable over a wide range of fuel autoxidative conditions. The quartz crystal microbalance (QCM) provides a low temperature (140 °C) batch reactor environment for long reaction times (minutes to hours) with oxygen consumption and sensitive, in situ deposition measurements. The JFTOT system provides a flowing environment at higher temperatures (260 to 300 °C) and short residence times (seconds) which is modified with both an outlet oxygen sensor and with quantitative deposition measurements via ellipsometry. These techniques are used to study model systems (Exxsol D80 with added heteroatom species) and real jet fuels to determine the role of heteroatomic species in jet fuel autoxidation and deposition....