Mixed butanols addition to gasoline surrogates: Shock tube ignition delay time measurements and chemical kinetic modeling

Handle URI:
http://hdl.handle.net/10754/594224
Title:
Mixed butanols addition to gasoline surrogates: Shock tube ignition delay time measurements and chemical kinetic modeling
Authors:
AlRamadan, Abdullah S.; Badra, Jihad ( 0000-0002-8035-8883 ) ; Javed, Tamour ( 0000-0002-3328-9061 ) ; Alabbad, Mohammed; Bokhumseen, Nehal; Gaillard, Patrick; Babiker, Hassan; Farooq, Aamir ( 0000-0001-5296-2197 ) ; Sarathy, Mani ( 0000-0002-3975-6206 )
Abstract:
The demand for fuels with high anti-knock quality has historically been rising, and will continue to increase with the development of downsized and turbocharged spark-ignition engines. Butanol isomers, such as 2-butanol and tert-butanol, have high octane ratings (RON of 105 and 107, respectively), and thus mixed butanols (68.8% by volume of 2-butanol and 31.2% by volume of tert-butanol) can be added to the conventional petroleum-derived gasoline fuels to improve octane performance. In the present work, the effect of mixed butanols addition to gasoline surrogates has been investigated in a high-pressure shock tube facility. The ignition delay times of mixed butanols stoichiometric mixtures were measured at 20 and 40bar over a temperature range of 800-1200K. Next, 10vol% and 20vol% of mixed butanols (MB) were blended with two different toluene/n-heptane/iso-octane (TPRF) fuel blends having octane ratings of RON 90/MON 81.7 and RON 84.6/MON 79.3. These MB/TPRF mixtures were investigated in the shock tube conditions similar to those mentioned above. A chemical kinetic model was developed to simulate the low- and high-temperature oxidation of mixed butanols and MB/TPRF blends. The proposed model is in good agreement with the experimental data with some deviations at low temperatures. The effect of mixed butanols addition to TPRFs is marginal when examining the ignition delay times at high temperatures. However, when extended to lower temperatures (T < 850K), the model shows that the mixed butanols addition to TPRFs causes the ignition delay times to increase and hence behaves like an octane booster at engine-like conditions. © 2015 The Combustion Institute.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division
Citation:
AlRamadan AS, Badra J, Javed T, Al-Abbad M, Bokhumseen N, et al. (2015) Mixed butanols addition to gasoline surrogates: Shock tube ignition delay time measurements and chemical kinetic modeling. Combustion and Flame 162: 3971–3979. Available: http://dx.doi.org/10.1016/j.combustflame.2015.07.035.
Publisher:
Elsevier BV
Journal:
Combustion and Flame
Issue Date:
Oct-2015
DOI:
10.1016/j.combustflame.2015.07.035
Type:
Article
ISSN:
0010-2180
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorAlRamadan, Abdullah S.en
dc.contributor.authorBadra, Jihaden
dc.contributor.authorJaved, Tamouren
dc.contributor.authorAlabbad, Mohammeden
dc.contributor.authorBokhumseen, Nehalen
dc.contributor.authorGaillard, Patricken
dc.contributor.authorBabiker, Hassanen
dc.contributor.authorFarooq, Aamiren
dc.contributor.authorSarathy, Manien
dc.date.accessioned2016-01-19T14:43:45Zen
dc.date.available2016-01-19T14:43:45Zen
dc.date.issued2015-10en
dc.identifier.citationAlRamadan AS, Badra J, Javed T, Al-Abbad M, Bokhumseen N, et al. (2015) Mixed butanols addition to gasoline surrogates: Shock tube ignition delay time measurements and chemical kinetic modeling. Combustion and Flame 162: 3971–3979. Available: http://dx.doi.org/10.1016/j.combustflame.2015.07.035.en
dc.identifier.issn0010-2180en
dc.identifier.doi10.1016/j.combustflame.2015.07.035en
dc.identifier.urihttp://hdl.handle.net/10754/594224en
dc.description.abstractThe demand for fuels with high anti-knock quality has historically been rising, and will continue to increase with the development of downsized and turbocharged spark-ignition engines. Butanol isomers, such as 2-butanol and tert-butanol, have high octane ratings (RON of 105 and 107, respectively), and thus mixed butanols (68.8% by volume of 2-butanol and 31.2% by volume of tert-butanol) can be added to the conventional petroleum-derived gasoline fuels to improve octane performance. In the present work, the effect of mixed butanols addition to gasoline surrogates has been investigated in a high-pressure shock tube facility. The ignition delay times of mixed butanols stoichiometric mixtures were measured at 20 and 40bar over a temperature range of 800-1200K. Next, 10vol% and 20vol% of mixed butanols (MB) were blended with two different toluene/n-heptane/iso-octane (TPRF) fuel blends having octane ratings of RON 90/MON 81.7 and RON 84.6/MON 79.3. These MB/TPRF mixtures were investigated in the shock tube conditions similar to those mentioned above. A chemical kinetic model was developed to simulate the low- and high-temperature oxidation of mixed butanols and MB/TPRF blends. The proposed model is in good agreement with the experimental data with some deviations at low temperatures. The effect of mixed butanols addition to TPRFs is marginal when examining the ignition delay times at high temperatures. However, when extended to lower temperatures (T < 850K), the model shows that the mixed butanols addition to TPRFs causes the ignition delay times to increase and hence behaves like an octane booster at engine-like conditions. © 2015 The Combustion Institute.en
dc.publisherElsevier BVen
dc.subjectButanolsen
dc.subjectChemical kineticsen
dc.subjectIgnition delay timesen
dc.subjectOctane boostersen
dc.subjectShock tubeen
dc.subjectToluene primary reference fuelsen
dc.titleMixed butanols addition to gasoline surrogates: Shock tube ignition delay time measurements and chemical kinetic modelingen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalCombustion and Flameen
dc.contributor.institutionSaudi Aramco Research and Development Center, Fuel Technology R and D Division, Dhahran 31311, Saudi Arabiaen
kaust.authorJaved, Tamouren
kaust.authorAlabbad, Mohammeden
kaust.authorFarooq, Aamiren
kaust.authorSarathy, Manien
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