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dc.contributor.authorNakamura, Hisashi
dc.contributor.authorCurran, Henry J.
dc.contributor.authorCórdoba, Angel Polo
dc.contributor.authorPitz, William J.
dc.contributor.authorDagaut, Philippe
dc.contributor.authorTogbé, Casimir
dc.contributor.authorSarathy, S. Mani
dc.contributor.authorMehl, Marco
dc.contributor.authorAgudelo, John R.
dc.contributor.authorBustamante, Felipe
dc.identifier.citationNakamura, H,Curran, HJ,Cordoba, AP,Pitz, WJ,Dagaut, P,Togbe, C,Sarathy, SM,Mehl, M,Agudelo, JR,Bustamante, F (2015) 'An experimental and modeling study of diethyl carbonate oxidation'. Combustion And Flame, 162 :1395-1405.en_IE
dc.descriptionJournal articleen_IE
dc.description.abstractDiethyl carbonate (DEC) is an attractive biofuel that can be used to displace petroleum-derived diesel fuel, thereby reducing CO2 and particulate emissions from diesel engines. A better understanding of DEC combustion characteristics is needed to facilitate its use in internal combustion engines. Toward this goal, ignition delay times for DEC were measured at conditions relevant to internal combustion engines using a rapid compression machine (RCM) and a shock tube. The experimental conditions investigated covered a wide range of temperatures (660-1300 K), a pressure of 30 bar, and equivalence ratios of 0.5, 1.0 and 2.0 in air. To provide further understanding of the intermediates formed in DEC oxidation, species concentrations were measured in a jet-stirred reactor at 10 atm over a temperature range of 500-1200 K and at equivalence ratios of 0.5, 1.0 and 2.0. These experimental measurements were used to aid the development and validation of a chemical kinetic model for DEC.The experimental results for ignition in the RCM showed near negative temperature coefficient (NTC) behavior. Six-membered alkylperoxy radical (R(O) over dot(2)) isomerizations are conventionally thought to initiate low-temperature branching reactions responsible for NTC behavior, but DEC has no such possible 6- and 7-membered ring isomerizations. However, its molecular structure allows for 5-, 8- and 9-membered ring R(O) over dot(2) isomerizations. To provide accurate rate constants for these ring structures, ab initio computations for R(O) over dot(2) reversible arrow (Q) over dot OOH isomerization reactions were performed. These new R(O) over dot(2) isomerization rate constants have been implemented in a chemical kinetic model for DEC oxidation. The model simulations have been compared with ignition delay times measured in the RCM near the NTC region. Results of the simulation were also compared with experimental results for ignition in the high-temperature region and for species concentrations in the jet-stirred reactor. Chemical kinetic insights into the oxidation of DEC were made using these experimental and modeling results. (C) 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved.en_IE
dc.description.sponsorshipUS Department of Energy - Contract DE-AC52-07NA27344en_IE
dc.publisherElsevier ScienceDirecten_IE
dc.relation.ispartofCombustion And Flameen
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Ireland
dc.subjectIgnition delay timeen_IE
dc.subjectShock tubeen_IE
dc.subjectRapid compression machineen_IE
dc.subjectDiethyl carbonateen_IE
dc.subjectJet-stirred reactoren_IE
dc.subjectRapid compression machineen_IE
dc.subjectJet-stirred reactoren_IE
dc.subjectAtom abstraction reactionsen_IE
dc.subjectEthylene-air mixturesen_IE
dc.subjectFlow diffusion flameen_IE
dc.subjectShock tubeen_IE
dc.subjectRate constantsen_IE
dc.subjectElevated pressuresen_IE
dc.subjectThermal decompositionen_IE
dc.subjectDimethyl carbonateen_IE
dc.titleAn experimental and modeling study of diethyl carbonate oxidationen_IE
dc.local.contactHenry Curran, Dept Of Chemistry, Room 215, Arts/Science Building, Nui Galway. 3856 Email:

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