Analysis of graphite oxide and graphene as enhancers for NATO F-76 diesel fuel

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Authors
Carroll, Benjamin O.
Subjects
graphite oxide
graphitic oxide
graphene
F-76
diesel
diesel engine
cetane
combustion
propellant
Advisors
Luhrs, Claudia
Seivwright, Douglas
Date of Issue
2015-06
Date
June 2015
Publisher
Monterey, California: Naval Postgraduate School
Language
Abstract
The aim of this thesis was to test the performance of graphite oxide (GO) and graphene (G) as fuel additives. Both compounds are variations of the honeycomb structure found in graphite but possess higher surface areas and different amounts of oxygen functional groups. The use of graphite oxide was considered due to its ability to release the oxygen species at moderate temperatures, while graphene could be readily dispersed and completely burned off during the combustion process. Graphite oxide was fabricated by chemical routes and graphene by thermal exfoliation. X-ray powder diffraction was used to characterize the crystal structure of the initial powders and the particulate sizes were studied by scanning electron microscopy. The additives were mixed with NATO F-76 diesel fuel in 0.1 to 3% weight ratios. The mixtures were then analyzed by differential scanning calorimetry and thermogravimetry to determine heat flows and mass changes, respectively, as the samples were heated, then compared with bare F-76. The evolved gases from all the processes were identified by mass spectroscopy. The fuel-additive mixtures were tested in a diesel engine to determine ignition delays and the cetane numbers for each composition are reported.
Type
Thesis
Description
Series/Report No
Department
Mechanical and Aerospace Engineering
Mechanical and Aerospace Engineering (MAE)
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NPS Report Number
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Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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