Autoignition of straight-run naphtha: A promising fuel for advanced compression ignition engines
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CNF_9829_HSRN Ignition Delays - Revised Final.pdf
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ArticleAuthors
AlAbbad, Mohammed A.
Issayev, Gani
Badra, Jihad

Voice, Alexander K.
Giri, Binod
Djebbi, Khalil
Ahmed, Ahfaz

Sarathy, Mani

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
2017-11-24Online Publication Date
2017-11-24Print Publication Date
2018-03Permanent link to this record
http://hdl.handle.net/10754/626213
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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 BVJournal
Combustion and FlameAdditional Links
http://www.sciencedirect.com/science/article/pii/S0010218017304352ae974a485f413a2113503eed53cd6c53
10.1016/j.combustflame.2017.10.038