Advanced thermally stable jet fuels. Technical progress report, August 1992--October 1992

Technical Report · Mon Feb 01 00:00:00 EST 1993

DOI:https://doi.org/10.2172/10168150· OSTI ID:10168150

Schobert, H H; Eser, S; Song, C; Hatcher, P G; Walsh, P M; Coleman, M M; Bortiatynski, J; Burgess, C; Dutta, R; Gergova, K; Lai, W C; Li, J; McKinney, D; Parfitt, D; Peng, Y; Sanghani, P; Yoon, E

The Penn State program in advanced thermally stable coal-based jet fuels has five borad objectives: (1) development of mechanisms of degradation and solids formation; (2) quantitative measurement of growth of sub-micrometer and miocrometer-sized particles suspended in fuels during thermal stressing; (3) characterization of carbonaceous deposits by various instrumental and microscopic methods; (4) elucidation of the role of additives in retarding the formation of carbonaceous solids; and (5) assessment of the potential of production of high yields of cycloalkanes by direct liquefaction of coal. Pyrolysis of four isomers of butylbenzene was investigated in static microautoclave reactors at 450{degrees}C under 0.69 MPa of UHP N{sub 2}. Thee rates of disappearance of substrates were found to depend upon the bonding energy of C{alpha}-C{beta} bond in the side chain in the initial period of pyrolysis reactions. Possible catalytic effects of metal surfaces on thermal degradation and deposit formation at temperatures >400{degrees}C have been studied. Carbon deposition depends on the composition of the metal surfaces, and also depends on the chemical compositions of the reactants. Thermal stressing of JP-8 was conducted in the presence of alumina, carbonaceous deposits recovered from earlier stressing experiments, activated carbon, carbon black, and graphite. The addition of different solid carbons during thermal stressing leads to different reaction mechanisms. {sup 13}C NMR spectroscopy, along with {sup 13}C-labeling techniques, have been used to examine the thermal stability of a jet fuel sample mixed with 5% benzyl alcohol. Several heterometallic complexes consisting of two transition metals and sulfur in a single molecule were synthesized and tested as precursors of bimetallic dispersed catalysts for liquefaction of a Montana subbituminous and Pittsburgh No. 8 bituminous coals.

• Research Organization: Pennsylvania State Univ., University Park, PA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-92PC92104
• OSTI ID: 10168150
• Report Number(s): DOE/PC/92104-T1; ON: DE93017711
• Resource Relation: Other Information: PBD: Feb 1993
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
01 COAL, LIGNITE, AND PEAT
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
JET ENGINE FUELS
RESEARCH PROGRAMS
THERMAL STRESSES
ALKYLATED AROMATICS
PYROLYSIS
COAL LIQUEFACTION
CATALYSTS
SYNTHESIS
CARBON
DEPOSITION
PROGRESS REPORT
CYCLOALKANES
EXPERIMENTAL DATA
100300
010405
400201
PROPERTIES AND COMPOSITION
HYDROGENATION AND LIQUEFACTION
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES