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Thermal decomposition of 2-ethylhexyl nitrate (2-EHN)

✍ Scribed by Holger Bornemann; Friedrich Scheidt; Wolfram Sander

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
125 KB
Volume
34
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

The decomposition mechanism of 2‐ethyl‐hexylnitrate (2‐EHN), an important additive to diesel fuel to improve the cetane number, was investigated in solution and in the gas phase. In trans‐decalin as solvent, an activation barrier for the thermal decomposition of 39 kcal/mol was determined, and thus the decomposition is slow at temperatures below 100°C. Under high pressure conditions (2.4 kbar) the decomposition rates decrease, in accordance with a radical mechanism. Flash vacuum pyrolysis with subsequent detection of the products via mass spectroscopy or matrix IR spectroscopy allows to identify NO~2~, formaldehyde, and several olefins as the major decomposition products. These data allow proposing a consistent mechanistic scheme for the 2‐EHN decay. © 2001 John Wiley & Sons, Inc. Int J Chem Kinet 34: 34–38, 2002

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