The purpose of this study was to evaluate whether a relationship exists between thermal
stabilities of selected fuel additives and their effectiveness as diesel fuel cetane improvers. The
additives were 2-ethylhexyl nitrate, isopropyl nitrate, tetraethylene glycol dinitrate, di(tert-butyl)
peroxide, and methylcyclopentadienyl manganese tricarbonyl. Rate constants and activation
parameters were determined for the thermolysis of the neat additives as well as the additives
dissolved in various solvents and fuels. In all cases, decomposition kinetics were first-order. Mass
spectral analysis was used to identify products from the thermal decomposition of the additives
in various solutions. Thermal stability, as measured by the kinetics of decomposition, was not
an accurate predictor of the effectiveness of the additives as cetane improvers. The effectiveness
of a given additive appeared to correlate to the degree of molecular fragmentation rather than to
thermal stability.
Cyclohexan (I) reagiert mit Iodosobenzol (II) in Gegenwart von Mangan(III)‐tetraphenylporphyrin‐Komplexen (III), die die C‐H‐Bindung aktivieren, in wäßrigem Milieu und in Gegenwart von verschiedenen Anionen X‐ zu Gemischen der Reaktionsprodukte (IV)‐(VI).
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