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Coryton Haltermann Gasoline Paper - Revised v2.pdf
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ArticleAuthors
Lee, ChangyoulAhmed, Ahfaz

Nasir, Ehson Fawad

Badra, Jihad

Kalghatgi, Gautam
Sarathy, Mani

Curran, Henry J.

Farooq, Aamir

KAUST Department
Chemical Engineering ProgramChemical Kinetics & Laser Sensors Laboratory
Clean Combustion Research Center
Combustion and Pyrolysis Chemistry (CPC) Group
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2017-08-14Online Publication Date
2017-08-14Print Publication Date
2017-12Permanent link to this record
http://hdl.handle.net/10754/625735
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Show full item recordAbstract
Gasoline anti-knock quality, defined by the research and motor octane numbers (RON and MON), is important for increasing spark ignition (SI) engine efficiency. Gasoline knock resistance can be increased using a number of blending components. For over two decades, ethanol has become a popular anti-knock blending agent with gasoline fuels due to its production from bio-derived resources. This work explores the oxidation behavior of two oxygenated certification gasoline fuels and the variation of fuel reactivity with molecular composition. Ignition delay times of Haltermann (RON = 91) and Coryton (RON = 97.5) gasolines have been measured in a high-pressure shock tube and in a rapid compression machine at three pressures of 10, 20 and 40 bar, at equivalence ratios of φ = 0.45, 0.9 and 1.8, and in the temperature range of 650–1250 K. The results indicate that the effects of fuel octane number and fuel composition on ignition characteristics are strongest in the intermediate temperature (negative temperature coefficient) region. To simulate the reactivity of these gasolines, three kinds of surrogates, consisting of three, four and eight components, are proposed and compared with the gasoline ignition delay times. It is shown that more complex surrogate mixtures are needed to emulate the reactivity of gasoline with higher octane sensitivity (S = RON–MON). Detailed kinetic analyses are performed to illustrate the dependence of gasoline ignition delay times on fuel composition and, in particular, on ethanol content.Citation
Lee C, Ahmed A, Nasir EF, Badra J, Kalghatgi G, et al. (2017) Autoignition characteristics of oxygenated gasolines. Combustion and Flame 186: 114–128. Available: http://dx.doi.org/10.1016/j.combustflame.2017.07.034.Sponsors
Research reported in this paper was funded by Saudi Aramco under the FUELCOM program and by King Abdullah University of Science and Technology (KAUST).Publisher
Elsevier BVJournal
Combustion and FlameAdditional Links
http://www.sciencedirect.com/science/article/pii/S0010218017302900ae974a485f413a2113503eed53cd6c53
10.1016/j.combustflame.2017.07.034