Co-optima fuels combustion: A comprehensive experimental investigation of prenol isomers

Ninnemann, Erik; Kim, Gihun; Laich, Andrew; Almansour, Bader; Terracciano, Anthony C.; Park, Su-Hyeon; Thurmond, Kyle; Neupane, Sneha; Wagnon, Scott W.; Pitz, William J.; Vasu, Subith

doi:10.1016/j.fuel.2019.115630

Cited by 33 publications

(19 citation statements)

References 36 publications

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“…Pyrolysis and oxidation experiments of dibutyl ether (DBE) were performed in a double-diaphragm, stainless-steel shock tube of 14.17 cm inner diameter located at University of Central Florida (UCF); specific details of which can be found in [15]. Since DBE has low vapor pressure (0.8 kPa at 298 K) [16], driven section of the shock tube was heated to T1 = 343 K to prevent condensation of the test mixture on the walls of the shock tube.…”

Section: Ucf Shock Tube and Laser Diagnosticmentioning

confidence: 99%

Ignition delay time and speciation of dibutyl ether at high pressures

Hakimov

Arafin

Aljohani

et al. 2021

Combustion and Flame

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Dibutyl ether (DBE) is a promising biofuel due to its high cetane number (~ 100) and high volumetric energy density (31.6 MJ/L). It could either be used directly in compression ignition engines or blended with other conventional or renewable fuels. Oxidation and pyrolysis kinetics of DBE are not well known, particularly at high pressures. In this work, we have experimentally investigated the chemical kinetics of DBE in three domains: (a) ignition delay time measurements in a rapid compression machine over T = 550 -650 K, P = 10, 20, 40 bar,  = 0.5, 1; (b) ignition delay time measurements in a shock tube over T = 900 -1300 K, P = 20, 40 bar,  = 0.5, 1; (c) laser-based carbon monoxide speciation measurements in a shock tube during DBE pyrolysis and oxidation over T = 1100 -1400 K, P = 20 bar. Pressure timehistories measured in RCM experiments exhibited unique 3-stage and 4-stage ignition behavior predominantly at fuel-lean conditions. Experimental data were compared with the predictions of two recent chemical kinetic models of DBE. Sensitivity analyses were carried out to identify key reactions which may have caused the discrepancy between experiments and simulations. It was found that the rate of decomposition of DBE may need to be revisited to improve the oxidative and pyrolytic predictions of DBE kinetic model.

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Section: Ucf Shock Tube and Laser Diagnosticmentioning

confidence: 99%

Ignition delay time and speciation of dibutyl ether at high pressures

Hakimov

Arafin

Aljohani

et al. 2021

Combustion and Flame

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“…Using the similarity analysis from Ref. 21, the calculated uncertainty in temperature remained < 4% before ignition in all cases. Overall, the uncertainties in CO concentrations remained <±10% prior to ignition and <±20% postignition.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 92%

“…Oxidation experiments of methyl butene isomers were conducted in a double‐diaphragm, stainless‐steel shock tube of 14.17 cm inner diameter located at the University of Central Florida (UCF), specific details of which can be found in Refs. 20‐29. Five piezoelectric pressure transducers spaced along the last 1.4 m of the shock tube and connected to four time‐interval counters were used to measure the incident shock velocity.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

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Influence of the double bond position in combustion chemistry of methyl butene isomers: A shock tube and laser absorption study

Arafin

Laich

Ninnemann

et al. 2020

Int J of Chemical Kinetics

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Shock tube experiments have been carried out on 2-methyl-1-butene (2M1B), 2-methyl-2-butene (2M2B), and 3-methyl-1-butene (3M1B)-the three isomers of methyl butene compound. Carbon monoxide (CO) time-histories and ignition delay times are obtained behind reflected shockwaves over the temperature range of 1350-1630 K and pressures of 8.3-10.5 atm with stoichiometric mixtures of 0.075% fuel in O 2 /Ar. Comparative ignition study reveals that 3M1B ignites significantly faster than the other two isomers, while 2M1B dissociates earlier but ignites later than 2M2B. Possible mechanisms for this behavior are discussed with ignition delay time sensitivity and reaction path analysis. In addition, timeresolved CO measurements are compared with three different reaction mechanisms from the literature. Sensitivity analyses have been carried out to identify important reactions that need attention to accurately predict the chemistry of these isomers. Further investigation into the rates of unimolecular fuel decomposition reactions and C 3 H 3 + O 2 = CH 2 CO + HCO reaction are suggested based on the current investigation.

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“…All experiments were performed in the high purity, double-diaphragm shock tube facility located at the University of Central Florida in Orlando, Florida (see refs. [11,18,[24][25][26][27][28][29][30][31][32]). This shock tube has an internal diameter of 14.17 cm.…”

Section: Experimental Methodsmentioning

confidence: 99%

Effects of High Fuel Loading and CO2 Dilution on Oxy-Methane Ignition Inside a Shock Tube at High Pressure

Laich

Baker

Ninnemann

et al. 2020

Journal of Energy Resources Technology

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Ignition delay times were measured for methane/O2 mixtures in a high dilution environment of either CO2 or N2 using a shock tube facility. Experiments were performed between 1044 K and 1356 K at pressures near 16 ± 2 atm. Test mixtures had an equivalence ratio of 1.0 with 16.67% CH4, 33.33% O2, and 50% diluent. Ignition delay times were measured using OH* emission and pressure time-histories. Data were compared to the predictions of two literature kinetic mechanisms (ARAMCO MECH 2.0 and GRI Mech 3.0). Most experiments showed inhomogeneous (mild) ignition which was deduced from five time-of-arrival pressure transducers placed along the driven section of the shock tube. Further analysis included determination of blast wave velocities and locations away from the end wall of initial detonations. Blast velocities were 60–80% of CJ-Detonation calculations. A narrow high temperature region within the range was identified as showing homogenous (strong) ignition which showed generally good agreement with model predictions. Model comparisons with mild ignition cases should not be used to further refine kinetic mechanisms, though at these conditions, insight was gained into various ignition behavior. To the best of our knowledge, we present first shock tube data during ignition of high fuel loading CH4/O2 mixtures diluted with CO2 and N2.

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Co-optima fuels combustion: A comprehensive experimental investigation of prenol isomers

Cited by 33 publications

References 36 publications

Ignition delay time and speciation of dibutyl ether at high pressures

Ignition delay time and speciation of dibutyl ether at high pressures

Influence of the double bond position in combustion chemistry of methyl butene isomers: A shock tube and laser absorption study

Effects of High Fuel Loading and CO2 Dilution on Oxy-Methane Ignition Inside a Shock Tube at High Pressure

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