Abstract
Investigating the combustion chemistry of gasoline surrogate fuels promises to improve detailed reaction mechanisms used for simulating their combustion. In this work, the combustion chemistry of one of the simplest, but most frequently used gasoline surrogates – primary reference fuel 84 (PRF 84, 84 vol% iso-octane and 16 vol% n-heptane), has been examined in a stoichiometric premixed laminar flame. Time-of-flight mass spectrometry coupled with a vacuum ultraviolet (VUV) synchrotron light source for species photoionization was used. Reactants, major end-products, stable intermediates, free radicals, and isomeric species were detected and quantified. Numerical simulations were conducted using a detailed chemical kinetic model with the most recently available high temperature sub-mechanisms for iso-octane and heptane, built on the top of an updated pentane isomers model and AramcoMech 2.0 (C0C4) base chemistry. A detailed interpretation of the major differences between the mechanistic pathways of both fuel components is given. A comparison between the experimental and numerical results is depicted and rate of production and sensitivity analyses are shown for the species with considerable disagreement between the experimental and numerical findings.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 300-311 |
| Number of pages | 12 |
| Journal | Combustion and Flame |
| Volume | 179 |
| DOIs | |
| State | Published - Mar 10 2017 |
Bibliographical note
KAUST Repository Item: Exported on 2020-10-01Acknowledgements: The authors acknowledge funding support from the Clean Combustion Research Center and from Saudi Aramco under the FUELCOM program. Measurements were performed by the flame team at the Advanced Light Source (ALS), Lawrence Berkeley National Laboratory. We thank everyone for assistance with data acquisition. Experiments at the Advanced Light Source (ALS), profited from the expert technical assistance of Paul Fugazzi. The ALS is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract no. DEAC02-05CH11231. Sandia is a multi-mission laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the National Nuclear Security Administration under Contract DE-AC04-94-AL85000.