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CC BY-NC V4.0, Open Access
Dissertation
Isomer Identification in Sustainable Aviation Fuel Using Gas Chromatography and Vacuum Ultraviolet Spectroscopy
Washington State University
Doctor of Philosophy (PhD), Washington State University
07/2024
DOI:
https://doi.org/10.7273/000006915
Abstract
Sustainable aviation fuel offers potential to decarbonize commercial aviation immediately and into the future. To meet the environmental targets for alternative fuels, new production pathways are necessary. New fuel pathways often have compositions significantly different from conventional petroleum fuels leading to a justified conservatism in the approval process. To accommodate these concerns, improved scientific understanding and analytical methods are needed. Specifically, this work explores the importance of isomeric structure on fuel properties and the value identification of the isomers can have on fuel property predictions. In this work, we explore property prediction methods from hydrocarbon group type analysis where we identify isomeric property variance as a major source of prediction uncertainty. Some isomeric property variance is explained by structural characteristics like cycloalkane ring size. To eliminate the isomeric uncertainty in predictions, a method is developed to confidently identify specific isomers in a jet fuel using two-dimensional gas chromatography with a vacuum ultraviolet detector. This identifies correct matches by assuming that the difference between reference vacuum ultraviolet response and measured response is exactly equivalent to the noise of the device. Leveraging the strong repeatability of the detector, limits of identification are made on hydrocarbons with very similar spectra. The novel techniques are then applied to a surrogate fuel, a real fuel, and an alternative fuel candidate and the resulting property prediction uncertainty is shared. Finally, for freezing point, a property highly affected by isomeric structure, a novel approach for predicting the property from composition is presented.
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Details
- Title
- Isomer Identification in Sustainable Aviation Fuel Using Gas Chromatography and Vacuum Ultraviolet Spectroscopy
- Creators
- David Conway Bell
- Contributors
- Joshua S Heyne (Chair)Jacob W Leachman (Committee Member)Jonathan L Male (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- School of Mechanical and Materials Engineering
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Publisher
- Washington State University
- Number of pages
- 220
- Identifiers
- 99901152438001842
- Language
- English
- Resource Type
- Dissertation