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作者 Garner, Stephen
書名 Biologically Derived Diesel Fuel and Nitrogen Monoxide Formation: An Experimental and Chemical Kinetic Modeling Study
國際標準書號 9781124864600
book jacket
說明 219 p
附註 Source: Dissertation Abstracts International, Volume: 72-11, Section: B, page: 6986
Adviser: Kenneth Brezinsky
Thesis (Ph.D.)--University of Illinois at Chicago, 2011
To examine the possible chemical sources of the increased NOx that is seen during the combustion of biodiesel fuels, when compared to conventional petroleum based diesel fuel, experiments have been performed at relevant combustion pressures of 27atm and 53atm, and nominal reactions times of ∼1.65ms. Representative saturated and unsaturated components of biodiesel surrogates, methyl octanoate and methyl trans-2-octenoate, were studied in a high pressure single pulse shock tube under the rich oxidation conditions, phi≈1 to phi≈3, that are present during diesel combustion. In addition, three separate C7 hydrocarbon fuels, which are analogs of the hydrocarbon side chains of these biodiesel surrogates, have been studied. It was hypothesized, and seen experimentally, that increased amounts of acetylene, C2H 2, were formed from the unsaturated methyl ester compared to the saturated methyl ester. Acetylene was hypothesized to be, and used as, a marker to predict prompt NO formation due to its known coupling to prompt NO through methylidyne (CH) production under rich oxidation conditions. The experimental shock tube data of stable intermediate species mole fractions as a function of temperature, pressure, and reaction time were used to develop and validate a chemical kinetic model for the rich oxidation and pyrolysis of methyl octanoate, methyl trans-2-octenoate, and the C7 analogs of the hydrocarbon side chains for these fuels. Following the model's validation against the experimental shock tube data it was coupled to an existing prompt NO mechanism. Using the model in a predictive capacity it was seen that over the specific temperature range of 1050K to 1450K larger amounts of NO were predicted from the unsaturated fuel, methyl octenoate, with a maximum difference in the mole fraction predictions to be approximately an order of magnitude at 1200K. These predictions therefore support the hypothesis within the literature that a portion of the increased NOx seen from the combustion of biologically derived diesel fuel is due to chemical effects
School code: 0799
Host Item Dissertation Abstracts International 72-11B
主題 Chemistry, Inorganic
Engineering, Mechanical
Alt Author University of Illinois at Chicago
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