The nature and amount of carbon deposits from the thermal stressing of two different types of petroleum derived jet fuels, JP-8 and Jet A, were compared over a range of contemporary metal and alloy surfaces to understand the change in the nature of the deposition with change in fuel and catalytic surface effects. Characterization of these deposits using TPO revealed that all four substrates (Ni, Fe, Ni-Fe, and Inconel 600) facilitate, the formation of more than one type of carbon deposit through various complex mechanisms. Overall, JP-8 formed more carbon deposition than Jet A over pure metals, binary alloy, and super alloy surfaces, however, both low temperature and high temperature carbon peaks occurred at nearly the same temperature for a particular substrate in both fuels. The pure metals nickel and iron individually formed more carbon deposits than their combined binary (Fe-Ni 55/45) alloy. Inconel 600 showed a significantly different behavior compared to the pure metals and binary alloy. The Inconel 600 substrate mainly produced small spherical amorphous carbon when stressed with JP-8 and formed highly ordered filamentous carbon as well as amorphous carbon deposits with Jet A. A varied nature of carbon deposits over these substrates with both JP-8 and Jet A was observed. The burn off temperatures for low temperature carbon increased in the order Fe-Ni, Fe, Inconel 600, Ni for JP-8 and Fe-Ni, NJ, Fe, Inconel 600 for Jet A.
|Original language||English (US)|
|Number of pages||3|
|Journal||ACS Division of Fuel Chemistry, Preprints|
|State||Published - Sep 1 2003|
All Science Journal Classification (ASJC) codes