NDLI: Electron spin resonance study of thermal instability reactions in jet fuels

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Electron spin resonance study of thermal instability reactions in jet fuels

Content Provider	NASA Technical Reports Server (NTRS)
Author	Zeldes, H. Livingston, R.
Copyright Year	1984
Description	Free radicals were studied by electron spin resonance (ESR) using model compounds that are representative of constituents of jet fuels. Radical formation was initiated with peroxides and hydroperoxides by using UV photolysis at and near room temperature and thermal initiation at higher temperatures. Both oxygen free and air saturated systems were studied. N-Dodecane was frequently used as a solvent, and a mixture of n-dodecyl radicals was made with a peroxide initiator in n-dodecane (free of oxygen) thermally at 212 C and photolytically at room temperature. Hydrogen abstraction from the 3,4,5 and 6-positions gives radicals that are sufficiently alike that their spectra are essentially superimposed. The radical formed by abstract of hydrogen from the 2-position gives a different spectrum. ESR parameters for these radicals were measured. The radical formed by abstraction of a primary hydrogen was not observed. Similar radicals are formed from n-decane. A variety of exploratory experiments were carried out with systems that give free radical spectra to which was added small amounts of 2,5-dimethylpyrrole.
File Size	1851975
Page Count	52
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19840010350
Archival Resource Key	ark:/13960/t0ns5kt9n
Language	English
Publisher Date	1984-01-01
Access Restriction	Open
Subject Keyword	Propellants And Fuels Temperature Dependence Concentration Composition Free Radicals Photolysis Reaction Kinetics Peroxides Electron Paramagnetic Resonance Jet Engine Fuels Steady State Thermal Stability Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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