Advanced Thermally Stable Jet Fuels Development Program Annual Report. Volume 2.Compositional Factors Affecting Thermal Degradation of Jet Fuels

摘要

Model hydrocarbon compounds and jet fuels derived from both petroleum and coalliquids were thermally stressed in microautoclave reactors at temperatures of 350-500 degrees C. Regardless of starting material, alkylated benzenes, alkylated naphthalenes, biphenyls, and complex polycyclic aromatics are formed by this thermal stressing. The concentration of these intermediates depends on the starting material and the experimental conditions. The formation of solids is directly related to high concentrations of alkylbenzenes and polycyclic aromatics in the liquid phase. Solid products consist primarily of large polycyclic aromatics with varying aliphatic substitution and their composition depends on the compound and the thermal conditions. Analysis of the solids showed anisotropic structures consistent with pseudo-nematic liquid crystalline mesophase. From these experiments a preliminary ordering of compound stability based on structure has been established.(ttl)