Advanced Thermally Stable Coal-Based Jet Fuels
Annual rept. 1 Jul 2007-30 Jun 2008
PENNSYLVANIA STATE UNIV UNIVERSITY PARK COAL UTILIZATION CENTER
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The contract year represented a no-cost extension on the original contract. Work was continued on the use of solvent extraction of coal to produce a material suitable for further hydrotreating to the coal-based JP-8 fuel. This switch to solvent extraction instead of relying on the refined chemical oil used previously i in full agreement with recommendations provided by RAND. Exploratory work was begun to evaluate the possible production of nuclear graphite from the by-products of co-coking. This would allow use of distillation residue rather than decant oil as feed to the coker, again in agreement with RANDs recommendations. A very solid hypothesis was developed, indicating that the mechanisms of oxidative deposit formation in diesel and jet fuels are the same. This has been backed up with experimental evidence. Work was conducted to compare measurements of the flame response function made in a laboratory-scale lean direct injection combustor operating on Jet-A fuel and a cola-derived JP-8 fuel. The flame response function is determined from phase-synchronized measurements of the fuel flow rate modulation and the resulting fluctuation of the flames rate of heat release. Completion of this work will await the next pilot-scale run of producing coal-derived JP-8.
- Industrial Chemistry and Chemical Processing
- Geology, Geochemistry and Mineralogy