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    Autoignition of straight-run naphtha: A promising fuel for advanced compression ignition engines

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    Name:
    CNF_9829_HSRN Ignition Delays - Revised Final.pdf
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    1.109Mb
    Format:
    PDF
    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    AlAbbad, Mohammed A. cc
    Issayev, Gani
    Badra, Jihad cc
    Voice, Alexander K.
    Giri, Binod
    Djebbi, Khalil
    Ahmed, Ahfaz cc
    Sarathy, Mani 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
    2017-11-24
    Online Publication Date
    2017-11-24
    Print Publication Date
    2018-03
    Permanent link to this record
    http://hdl.handle.net/10754/626213
    
    Metadata
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    Abstract
    Naphtha, a low-octane distillate fuel, has been proposed as a promising low-cost fuel for advanced compression ignition engine technologies. Experimental and modelling studies have been conducted in this work to assess autoignition characteristics of naphtha for use in advanced engines. Ignition delay times of a certified straight-run naphtha fuel, supplied by Haltermann Solutions, were measured in a shock tube and a rapid comparison machine over wide ranges of experimental conditions (20 and 60 bar, 620–1223 K, ϕ = 0.5, 1 and 2). The Haltermann straight-run naphtha (HSRN) has research octane number (RON) of 60 and motor octane number (MON) of 58.3, with carbon range spanning C3–C9. Reactivity of HSRN was compared, via experiments and simulations, with three suitably formulated surrogates: a two-component PRF (n-heptane/iso-octane) surrogate, a three-component TPRF (toluene/n-heptane/iso-octane) surrogate, and a six-component surrogate. All surrogates reasonably captured the ignition delays of HSRN at high and intermediate temperatures. However, at low temperatures (T < 750 K), the six-component surrogate performed the best in emulating the reactivity of naphtha fuel. Temperature sensitivity and rate of production analyses revealed that the presence of cyclo-alkanes in naphtha inhibits the overall fuel reactivity. Zero-dimensional engine simulations showed that PRF is a good autoignition surrogate for naphtha at high engine loads, however, the six-component surrogate is needed to match the combustion phasing of naphtha at low engine loads.
    Citation
    Alabbad M, Issayev G, Badra J, Voice AK, Giri BR, et al. (2018) Autoignition of straight-run naphtha: A promising fuel for advanced compression ignition engines. Combustion and Flame 189: 337–346. Available: http://dx.doi.org/10.1016/j.combustflame.2017.10.038.
    Sponsors
    Research reported in this publication 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.2017.10.038
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S0010218017304352
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.combustflame.2017.10.038
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Engineering Program; Mechanical Engineering Program; Clean Combustion Research Center

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