Preignition and Autoignition Behavior of the Xylene Isomers
Abstract
The relative preignition and autoignition reactivity of o-, m- and p-xylene has been studied. Preignition experiments were conducted in a pressurized flow reactor facility at 600-850 K temperatures, 8 atm pressure, and lean equivalence ratios. Analysis of the data included carbon monoxide and carbon dioxide measurements using a nondispersive infrared analyzer and molecular oxygen measurements using an electrochemical oxygen cell. Identification of intermediate species was performed using gas chromatography with flame ionization detection and a mass spectrometer. Additional experiments were conducted in a single cylinder research engine. Neat o- and m-xylene were oxidized in the reactor under preignition conditions. They showed no reactivity, so mixtures of each isomer with n-dodecane were tested and compared, and intermediate species were identified. This data helped resolve a recent controversy regarding the relative reactivity of the xylene isomers. To study the autoignition of the xylenes, the isomers neat, in binary mixtures with n-decane, and in six-component JP-8 surrogates were tested in the single cylinder research engine. The experimental data were analyzed and compared to existing chemical kinetic models, and it was concluded that at lower temperatures (<850 K), the xylenes show similar reactivity, and at higher temperatures, o-xylene is the more reactive isomer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2010
- Accession Number
- ADA519619
Entities
People
- Robert H. Natelson
Organizations
- Drexel University