Combustion Noise and Vibration

Tupa, R. C.

doi:10.4271/590365

Cited by 5 publications

(1 citation statement)

References 8 publications

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“…However, if cetane improvers simply acted to input heat into the system faster, one might expect a proportional increase in cetane number with increase in amount of cetane improver. Cetane number does increase with increasing cetane improver, but not linearly: as concentration of the additive increases, the rate of cetane number increase declines (see Figure ). , Other studies (on the ignition of model fuels in a constant-volume combustion apparatus) indicate that cetane improvers, by decomposing to reactive radicals in the low-temperature regime of the preignition combustion chamber, affect fuel ignition by earlier initiation of radical pool buildup. Although the heat released by the subsequent radical reactions may contribute to the shortened ignition delay, some calculations suggest that the heat alone cannot account for the full effect …”

Section: Introductionmentioning

confidence: 92%

Fuel Combustion Additives: A Study of Their Thermal Stabilities and Decomposition Pathways

Oxley¹,

Smith²,

Rogers³

et al. 2000

Energy Fuels

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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.

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Section: Introductionmentioning

confidence: 92%