Author: Publisher:
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Category :
Languages : en
Pages :
Book Description
Advanced Thermally Stable Jet Fuels. Technical Progress Report, January 1994-March 1994
Author: Advanced Thermally Stable Jet Fuels. Technical Progress Report, April 1994-June 1994
Author: Advanced Thermally Stable Jet Fuels: Technical Progress Report, October 1994-December 1994
Author: Advanced Thermally Stable Jet Fuels
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 111
Book Description
There are five tasks within this project on thermally stable coal-based jet fuels. Progress on each of the tasks is described. Task 1, Investigation of the quantitative degradation chemistry of fuels, has 3 subtasks which are described: Pyrolysis of n-alkylbenzenes; Thermal decomposition of n-tetradecane in near-critical region; and Re-examining the effects of reactant and inert gas pressure on tetradecane pyrolysis--Effect of cold volume in batch reactor. Under Task 2, Investigation of incipient deposition, the subtask reported is Uncertainty analysis on growth and deposition of particles during heating of coal-derived aviation gas turbine fuels; under Task 3, Investigation of the quantitative degradation chemistry of fuels, is subtask, Effects of high surface area activated carbon and decalin on thermal degradation of jet A-1 fuel and n-dodecane; under Task 4, Coal-based fuel stabilization studies, is subtask, Screening potential jet fuel stabilizers using the model compound dodecane; and under Task 5, Exploratory studies on the direct conversion of coal to high quality jet fuels, is subtask, Shape-selective naphthalene hydrogenation for production of thermally stable jet fuels. 25 refs., 64 figs., 22 tabs.
Energy Research Abstracts
Author: Advanced Thermally Stable Jet Fuels. Technical Progress Report, January 1995--March 1995
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 176
Book Description
Quantitative structure-property relationships have been applied to study the thermal stability of pure hydrocarbons typical of jet fuel components. A simple method of chemical structure description in terms of Benson groups was tested in searching for structure-property relationships for the hydrocarbons tested experimentally in this program. Molecular connectivity as a structure-based approach to chemical structure-property relationship analysis was also tested. Further development of both the experimental data base and computational methods will be necessary. Thermal decomposition studies, using glass tube reactors, were extended to two additional model compounds: n-decane and n-dodecane. Efforts on refining the deposit growth measurement and characterization of suspended matter in stressed fuels have lead to improvements in the analysis of stressed fuels. Catalytic hydrogenation and dehydrogenation studies utilizing a molybdenum sulfide catalyst are also described.
Advanced Thermally Stable Jet Fuels. Technical Progress Report, April 1996--June 1996
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 38
Book Description
The Penn State program in advanced thermally stable jet fuels has five components: (1) development of mechanisms of degradation and solids formation: (2) quantitative measurement of growth of sub-micrometer and micrometer-sized particles 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 producing high yields of cycloalkanes and hydroaromatics from coal.
Advanced Thermally Stable Jet Fuels. Technical Progress Report, April 1995--June 1995
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 122
Book Description
Research continued on thermally stable jet fuel from coal liquids and petroleum distillates. The oxidative and thermal stabilities of ten fuels have been studied by differential scanning calorimetry and in microautoclave reactors. The compositions of the stressed fuels (as well as the unreacted fuels) were characterized by gas chromatography and gas chromatography/mass spectrometry. In addition, simulated distillation curves were determined by thermogravimetric analysis. The product distributions and reaction mechanisms for the thermal decomposition of n-alkanes in near-critical and supercritical regions were studied. The emphasis of the work in this reporting period has been placed on reaction mechanisms and product distributions. Work is continuing on obtaining additional 13C-labeled jet fuel components for future thermal stressing studies. Compounds of current interest include 6-13C-dodecane and 1-cyclohexyl-1-13C-hexane. Further analysis of the formation of solids from the thermal stressing of decane and decalin has been performed.
Advanced Thermally Stable Jet Fuels. Technical Progress Report, January 1996--March 1996
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 85
Book Description
A reactive structure index was developed to correlate the molecular structures of saturated hydrocarbons with their reactivities using a linear group contribution method. The index is composed of several sub-indices determined from the structure, including carbon group indices, ring index, and conformation index. The effects on decomposition of ring structure, side-chain length, steric isomers, and branching were examined. Good correlations were obtained for two sets of saturated hydrocarbons. The reactivity of alkanes and cycloalkanes increases with increasing chain or side-chain length. Cycloalkanes are desirable components of advanced jet fuels, in terms of having higher thermal stability and density than n-alkanes of the same carbon number. The cis-isomer is usually more reactive than the trans-isomer, except for cis-1,3-dimethylcyclohexane. which is more stable than its trans-isomer. The presence of a branch or branches appears to decrease the decomposition rate compared to n-alkanes.
Government Reports Annual Index
Author: Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1144
Book Description