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    Ignition delay time and speciation of dibutyl ether at high pressures

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    Thumbnail
    Name:
    DBE CnF Manuscript rev final unmarked.docx.pdf
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    2.985Mb
    Format:
    PDF
    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    Hakimov, Khaiyom
    Arafin, Farhan
    Aljohani, Khalid
    Djebbi, Khalil
    Ninnemann, Erik cc
    Vasu, Subith S.
    Farooq, Aamir cc
    KAUST Department
    Chemical Kinetics & Laser Sensors Laboratory
    Clean Combustion Research Center
    Mechanical Engineering
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2020-10-14
    Submitted Date
    2020-06-27
    Permanent link to this record
    http://hdl.handle.net/10754/665644
    
    Metadata
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    Abstract
    Dibutyl ether (DBE) is a promising biofuel due to its high cetane number (~ 100) and high volumetric energy density (31.6 MJ/L). It could either be used directly in compression ignition engines or blended with other conventional or renewable fuels. Oxidation and pyrolysis kinetics of DBE are not well known, particularly at high pressures. In this work, we have experimentally investigated the chemical kinetics of DBE in three domains: (a) ignition delay time measurements in a rapid compression machine over T = 550–650 K, P = 10, 20, 40 bar, ϕ = 0.5, 1; (b) ignition delay time measurements in a shock tube over T = 900–1300 K, P = 20, 40 bar, ϕ = 0.5, 1; (c) laser-based carbon monoxide speciation measurements in a shock tube during DBE pyrolysis and oxidation over T = 1100–1400 K, P = 20 bar. Pressure time-histories measured in RCM experiments exhibited unique 3-stage and 4-stage ignition behavior predominantly at fuel-lean conditions. Experimental data were compared with the predictions of two recent chemical kinetic models of DBE. Sensitivity analyses were carried out to identify key reactions which may have caused the discrepancy between experiments and simulations. It was found that the rate of decomposition of DBE may need to be revisited to improve the oxidative and pyrolytic predictions of DBE kinetic model.
    Citation
    Hakimov, K., Arafin, F., Aljohani, K., Djebbi, K., Ninnemann, E., Vasu, S. S., & Farooq, A. (2021). Ignition delay time and speciation of dibutyl ether at high pressures. Combustion and Flame, 223, 98–109. doi:10.1016/j.combustflame.2020.09.028
    Sponsors
    The work of KAUST authors was sponsored by the Office of Sponsored Research (OSR) at King Abdullah University of Science and Technology (KAUST). Research at UCF is supported by the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) under Award Numbers DE-EE0007982 and DE-EE0007984 (Co-Optima).
    Publisher
    Elsevier BV
    Journal
    Combustion and Flame
    DOI
    10.1016/j.combustflame.2020.09.028
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0010218020304120
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.combustflame.2020.09.028
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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