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    High-Pressure Viscosity of Biodiesel, Diesel, and Biodiesel-Diesel Blends: Experimental Data and Modeling

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    Duncan_ku_0099D_14267_DATA_1.pdf (24.29Mb)
    Issue Date
    2015-08-31
    Author
    Duncan, Andrew M.
    Publisher
    University of Kansas
    Format
    367 pages
    Type
    Dissertation
    Degree Level
    Ph.D.
    Discipline
    Chemical & Petroleum Engineering
    Rights
    Copyright held by the author.
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    Abstract
    Biodiesel was produced in excess of one billion gallons in the United States last year. It is sold as B100 (neat) and as a variety of blends. It is well known as a renewable fuel that reduces net carbon dioxide production, and other harmful emissions. Because much of the recent experimentation has involved biodiesel simply as a “drop in” fuel, its full, beneficial potential has not been reached. The ability to understand, model and predict important physical property behavior of current and potential fuels can lead to increased diesel engine performance, reduce harmful emissions further, and even improve fuel perception. High-pressure viscosity has been identified as one of the most important fuel properties of diesel fuel due to vehicle injectors creating pressures thousands of times greater than atmospheric. High-pressure viscosity measurements were performed for common biodiesels like those produced from soy and canola oils, but more exotic feedstocks like coconut and jatropha were also tested. Measurements were performed on dozens of fuels for temperatures between 278.15 and 373.15 K and pressures up to 131 MPa. Fuels were found to vary significantly from their ambient viscosities, and some were found to be more than 700 percent of their initial viscosity at the highest pressure tested. Blends were typically found to increase in viscosity with increasing blend fraction of biodiesel, however, this trend was shown to vary at low temperature and high pressure. Possible pressure freezing was found to occur for all biodiesel samples and for several high-percentage biodiesel blends at 283.15 K. Empirical models were developed as functions of temperature, pressure and blend percentage and were typically within the 95% confidence interval of the instrument.
    URI
    http://hdl.handle.net/1808/21687
    Collections
    • Dissertations [4474]
    • Engineering Dissertations and Theses [1055]

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    785-864-8983
    KU Libraries
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    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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