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dc.contributor.authorSingh, Eshan
dc.contributor.authorSarathy, Mani
dc.date.accessioned2021-02-17T08:43:10Z
dc.date.available2021-02-17T08:43:10Z
dc.date.issued2021-02-16
dc.date.submitted2020-11-17
dc.identifier.citationSingh, E., & Sarathy, S. M. (2021). The Role of Intermediate-Temperature Heat Release in Octane Sensitivity of Fuels with Matching Research Octane Number. Energy & Fuels. doi:10.1021/acs.energyfuels.0c03883
dc.identifier.issn0887-0624
dc.identifier.issn1520-5029
dc.identifier.doi10.1021/acs.energyfuels.0c03883
dc.identifier.urihttp://hdl.handle.net/10754/667491
dc.description.abstractImproving the efficiency of internal combustion engines is important for reducing global greenhouse gas emissions; the efficiency of spark ignition (SI) engines is limited by the knock phenomenon. As opposed to naturally aspirated engines, turbocharged engines operate at beyond research octane number (RON) conditions, and fuel octane sensitivity (OS = RON – motor octane number (MON)) becomes important under such conditions. Previous work by this group [ Energy Fuels 2017, 31, 1945−1960, DOI: 10.1021/acs.energyfuels.6b02659] elucidated the chemical kinetic origins of OS; this study is extended to provide a qualitative, as well as quantitative, definition of OS, based on fundamental ignition markers. A varying amount of toluene is blended with various primary reference fuels to match the ignition delay of the targeted research octane number fuels, allowing a range of octane sensitivities for each research octane number. This study establishes a correlation between OS and heat release rates at low, intermediate, and high temperatures. The significance and chemical origins of intermediate-temperature heat release in defining the OS of toluene blended in a mixture of iso-octane and n-heptane is also clarified. For the toluene–iso-octane–n-heptane mixtures considered here, low-temperature reactivity was not found to be a key marker of OS. The results also show areas of improved efficiency in beyond RON operating conditions, where high-sensitivity fuels could be beneficial.
dc.description.sponsorshipThis work was supported by King Abdullah University of Science and Technology (KAUST) with funds allocated to the Clean Combustion Research Center. We gratefully acknowledge contributions from the KAUST Clean Fuels Consortium (KCFC) and its member companies.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/10.1021/acs.energyfuels.0c03883
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Energy & Fuels, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.energyfuels.0c03883.
dc.titleThe Role of Intermediate-Temperature Heat Release in Octane Sensitivity of Fuels with Matching Research Octane Number
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentChemical Engineering Program
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentCombustion and Pyrolysis Chemistry (CPC) Group
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalEnergy & Fuels
dc.rights.embargodate2022-02-16
dc.eprint.versionPost-print
kaust.personSingh, Eshan
kaust.personSarathy, Mani
dc.date.accepted2021-01-14
refterms.dateFOA2021-02-17T08:43:40Z
kaust.acknowledged.supportUnitClean Combustion Research Center
kaust.acknowledged.supportUnitKAUST Clean Fuels Consortium (KCFC) and its member companies


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