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    Autoignition characteristics of oxygenated gasolines

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    Name:
    Coryton Haltermann Gasoline Paper - Revised v2.pdf
    Size:
    2.057Mb
    Format:
    PDF
    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    Lee, Changyoul
    Ahmed, Ahfaz cc
    Nasir, Ehson Fawad cc
    Badra, Jihad cc
    Kalghatgi, Gautam
    Sarathy, Mani cc
    Curran, Henry J. cc
    Farooq, Aamir cc
    KAUST Department
    Chemical Engineering Program
    Chemical Kinetics & Laser Sensors Laboratory
    Clean Combustion Research Center
    Combustion and Pyrolysis Chemistry (CPC) Group
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2017-08-14
    Online Publication Date
    2017-08-14
    Print Publication Date
    2017-12
    Permanent link to this record
    http://hdl.handle.net/10754/625735
    
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    Show full item record
    Abstract
    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 BV
    Journal
    Combustion and Flame
    DOI
    10.1016/j.combustflame.2017.07.034
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S0010218017302900
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.combustflame.2017.07.034
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Engineering Program; Chemical Engineering Program; Mechanical Engineering Program; Clean Combustion Research Center

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