Jet fuels having superior thermal stability

摘要

Disclosed herein are jet fuel compositions containing (a) a total aromatics content of from 2 vol. % to no more than about 25 vol. %; (b) a net heat of combustion of at least about 125,000 Btu/gal; (c) a concentration of less than about 5 vol. % of hydrocarbons having a boiling point greater than or equal to about 550° F., as determined by ASTM D 2887; and (d) a Jet Fuel Thermal Oxidation Test (JFTOT) thermal stability characterized by a filter pressure drop of no more than 25 mm Hg, a breakpoint temperature greater than or equal to about 300° C., and an overall tube deposit rating less than 3, as determined by ASTM D 3241. Methods for their preparation are also disclosed.

主权项

1. A jet fuel composition comprising:
(a) a total aromatics content of from 2 vol. % to no more than about 25 vol. %; (b) a net heat of combustion of at least about 128,000 Btu/gal; (c) a concentration of less than about 5 vol. % of hydrocarbons having a boiling point greater than or equal to about 550° F., as determined by ASTM D 2887; (d) a Jet Fuel Thermal Oxidation Test (JFTOT) thermal stability characterized by a filter pressure drop of no more than 25 mm Hg, a breakpoint temperature greater than or equal to about 300° C., and an overall tube deposit rating less than 3, as determined by ASTM D 3241; (e) a cycloparaffin content of from about 22 vol. % to about 35 vol. %, based on the total weight of the total paraffin content; (f) a normal paraffin content of from about 20 vol. % to about 35 vol. %, based on the total weight of the total paraffin content; and (g) an iso-paraffin content of from about 22 vol. % to about 35 vol. %, based on the total weight of the total paraffin content,wherein jet fuel composition is derived from a hydrocarbonaceous feedstock selected from the group consisting of one or more producing wells in fluid communication with a subterranean oil reservoir and a highly aromatic refinery stream.