Coal-Based Fuel Formulation and Engineering

Boehman, André L.; Hatcher, P.G.; Schobert, H.H.; Song, Chunshan

doi:10.21236/ada388112

Cited by 3 publications

(1 citation statement)

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“…The soot nanostructure was found to be more curved and disordered for the biofuel blend compared to the diesel soot which are regular having a core-shell structure. 38,75 3.6 CHEMKIN Comparisons Figure 7 is a schematic representation of the possible fuel-rich pockets developing during the pyrolysis of Jet-A and biofuel in a gas turbine engine. Larger and higher fuel-rich pockets represented in black are produced in pyrolysis of Jet-A fuel, while smaller and lower fuelrich pockets represented in gray are produced in pyrolysis of biofuel.…”

Section: Nanostructure Dependence Upon Biofuel Blend Levelmentioning

confidence: 99%

Impact of Biofuel Blends on Black Carbon Emissions from a Gas Turbine Engine

et al. 2020

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Presented here is an overview of non-volatile particulate matter (nvPM) emissions, i.e. "soot" as assessed by TEM analyses of samples collected after the exhaust of a J-85 turbojet fueled with Jet-A as well as with blends of Jet-A and Camelina biofuel. A unifying explanation is provided to illustrate the combustion dynamics of biofuel and Jet-A fuel. The variation of primary particle size, aggregate size and nanostructure are analyzed as a function of biofuel blend across a range of engine thrust levels. The postulate is based on where fuels start along the soot formation pathway. Increasing biofuel content lowers aromatic concentration while placing increasing dependence upon fuel pyrolysis reactions to form the requisite concentration of aromatics for particle inception and growth. The required "kinetic" time for pyrolysis reactions to produce benzene and multi-ring PAHs allows increased fuel-air mixing by turbulence, diluting the fuel-rich soot-forming regions, effectively lowering their equivalence ratio. With a lower precursor concentration, particle Publisher's Disclaimer: Disclaimer Publisher's Disclaimer: The U.S. Environmental Protection Agency collaborated in the research described herein. This work has not been subject to an administrative review and does not necessarily reflect the views of the Agency. No official endorsement should be inferred. EPA does not endorse the purchase or sale of any commercial products or services.

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Section: Nanostructure Dependence Upon Biofuel Blend Levelmentioning

confidence: 99%