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    Fuel spray combustion of waste cooking oil and palm oil biodiesel: Direct photography and detailed chemical kinetics

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    Type
    Conference Paper
    Authors
    Kuti, Olawole
    Nishida, Keiya
    Sarathy, Mani cc
    Zhu, Jingyu
    KAUST Department
    Chemical Engineering Program
    Clean Combustion Research Center
    Combustion and Pyrolysis Chemistry (CPC) Group
    Physical Science and Engineering (PSE) Division
    Date
    2013-10-14
    Permanent link to this record
    http://hdl.handle.net/10754/564814
    
    Metadata
    Show full item record
    Abstract
    This paper studies the ignition processes of two biodiesel from two different feedstock sources, namely waste cooked oil (WCO) and palm oil (PO). They were investigated using the direct photography through high-speed video observations and detailed chemical kinetics. The detailed chemical kinetics modeling was carried out to complement data acquired using the high-speed video observations. For the high-speed video observations, an image intensifier combined with OH* filter connected to a high-speed video camera was used to obtain OH* chemiluminscence image near 313 nm. The OH* images were used to obtain the experimental ignition delay of the biodiesel fuels. For the high-speed video observations, experiments were done at an injection pressure of 100, 200 and 300 MPa using a 0.16 mm injector nozzle. Also a detailed chemical kinetics for the biodiesel fuels was carried out using ac chemical kinetics solver adopting a 0-D reactor model to obtain the chemical ignition delay of the combusting fuels. Equivalence ratios obtained from the experimental ignition delay were used for the detailed chemical kinetics analyses. The Politecnico di Milano's thermochemical and reaction kinetic data were adopted to simulate the ignition processes of the biodiesels using the five fatty acid methyl esters (FAME) major components in the biodiesel fuels. From the high-speed video observations, it was observed that at increasing injection pressure, experimental ignition delay increased as a result of improvement in fuel and air mixing effects. Also the palm oil biodiesel has a shorter ignition delay compared to waste cooked oil biodiesel. This phenomenon could be attributed to the higher cetane number of palm biodiesel. The fuel spray ignition properties depend on both the physical ignition delay and chemical ignition delay. From the detailed chemical kinetic results it was observed that at the low temperature, high ambient pressure conditions reactivity increased as equivalent ratio increased. PO has a higher reactivity and this make its chemical ignition delay shorter as compared to WCO. This was attributed to the higher percentage of straight fully saturated chain methyl ester, i.e., methyl palmitate (C16:0) in PO. As injection pressure increases, physical delay, which is the difference between the experimental ignition delay and chemical ignition delay, decreases. As a result of inferior atomization PO biodiesel has longer physical delay compared to WCO. Hence it took longer time for PO biodiesel to achieve mixing prior to chemical ignition delay. Copyright © 2013 SAE International and Copyright © 2013 KSAE.
    Citation
    Kuti, O., Nishida, K., Sarathy, M., & Zhu, J. (2013). Fuel Spray Combustion of Waste Cooking Oil and Palm Oil Biodiesel: Direct Photography and Detailed Chemical Kinetics. SAE Technical Paper Series. doi:10.4271/2013-01-2554
    Publisher
    SAE International
    Journal
    SAE Technical Paper Series
    Conference/Event name
    SAE/KSAE 2013 International Powertrains, Fuels and Lubricants Meeting, FFL 2013
    DOI
    10.4271/2013-01-2554
    ae974a485f413a2113503eed53cd6c53
    10.4271/2013-01-2554
    Scopus Count
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Chemical Engineering Program; Clean Combustion Research Center

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