Effects of methyl group on aromatic hydrocarbons on the nanostructures and oxidative reactivity of combustion-generated soot

Handle URI:
http://hdl.handle.net/10754/621739
Title:
Effects of methyl group on aromatic hydrocarbons on the nanostructures and oxidative reactivity of combustion-generated soot
Authors:
Guerrero Peña, Gerardo D.J.; Alrefaai, Mhd Maher; Yang, Seung Yeon ( 0000-0003-4512-8713 ) ; Raj, Abhijeet; Brito, Joaquin L.; Stephen, Samuel; Anjana, Tharalekshmy; Pillai, Vinu; Al Shoaibi, Ahmed; Chung, Suk-Ho ( 0000-0001-8782-312X )
Abstract:
The substituted and unsubstituted aromatic hydrocarbons, present in transportation fuels such as gasoline and diesel, are thought to be responsible for most of the soot particles produced during their combustion. However, the effects of the substituted alkyl groups on the aromatic hydrocarbons on their sooting tendencies, and on the physical and chemical properties of soot produced from them are not well understood. In this work, the effect of the presence of methyl groups on aromatic hydrocarbons on their sooting propensity, and on the oxidative reactivity, morphology, and chemical composition of soot generated from them in diffusion flames is studied using benzene, toluene, and m-xylene as fuels. Several experimental techniques including high resolution transmission electron microscopy and X-ray diffraction are used to identify the morphological changes in soot, whereas the elemental and thermo-gravimetric analyses, electron energy loss spectroscopy, and Fourier transform infrared spectroscopy are used to study the changes in its chemical properties and reactivity. The activation energies for soot oxidation are calculated at different conversion levels, and a trend in the reactivity of soots from benzene, toluene and m-xylene is reported. It is observed that the sizes of primary particles and graphene-like sheets, and the concentrations of aliphatics and oxygenated groups in soot particles decreased with the addition of methyl group(s) on the aromatic ring. The physicochemical changes in soot are found to support the oxidative reactivity trends. © 2016 The Combustion Institute
KAUST Department:
Clean Combustion Research Center
Citation:
Guerrero Peña GDJ, Alrefaai MM, Yang SY, Raj A, Brito JL, et al. (2016) Effects of methyl group on aromatic hydrocarbons on the nanostructures and oxidative reactivity of combustion-generated soot. Combustion and Flame 172: 1–12. Available: http://dx.doi.org/10.1016/j.combustflame.2016.06.026.
Publisher:
Elsevier BV
Journal:
Combustion and Flame
Issue Date:
23-Jul-2016
DOI:
10.1016/j.combustflame.2016.06.026
Type:
Article
ISSN:
0010-2180
Sponsors:
This work was financially supported by The Petroleum Institute, UAE. SHC was supported by King Abdullah University of Science and Technology (KAUST) and Saudi Aramco.
Appears in Collections:
Articles; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorGuerrero Peña, Gerardo D.J.en
dc.contributor.authorAlrefaai, Mhd Maheren
dc.contributor.authorYang, Seung Yeonen
dc.contributor.authorRaj, Abhijeeten
dc.contributor.authorBrito, Joaquin L.en
dc.contributor.authorStephen, Samuelen
dc.contributor.authorAnjana, Tharalekshmyen
dc.contributor.authorPillai, Vinuen
dc.contributor.authorAl Shoaibi, Ahmeden
dc.contributor.authorChung, Suk-Hoen
dc.date.accessioned2016-11-03T13:23:56Z-
dc.date.available2016-11-03T13:23:56Z-
dc.date.issued2016-07-23en
dc.identifier.citationGuerrero Peña GDJ, Alrefaai MM, Yang SY, Raj A, Brito JL, et al. (2016) Effects of methyl group on aromatic hydrocarbons on the nanostructures and oxidative reactivity of combustion-generated soot. Combustion and Flame 172: 1–12. Available: http://dx.doi.org/10.1016/j.combustflame.2016.06.026.en
dc.identifier.issn0010-2180en
dc.identifier.doi10.1016/j.combustflame.2016.06.026en
dc.identifier.urihttp://hdl.handle.net/10754/621739-
dc.description.abstractThe substituted and unsubstituted aromatic hydrocarbons, present in transportation fuels such as gasoline and diesel, are thought to be responsible for most of the soot particles produced during their combustion. However, the effects of the substituted alkyl groups on the aromatic hydrocarbons on their sooting tendencies, and on the physical and chemical properties of soot produced from them are not well understood. In this work, the effect of the presence of methyl groups on aromatic hydrocarbons on their sooting propensity, and on the oxidative reactivity, morphology, and chemical composition of soot generated from them in diffusion flames is studied using benzene, toluene, and m-xylene as fuels. Several experimental techniques including high resolution transmission electron microscopy and X-ray diffraction are used to identify the morphological changes in soot, whereas the elemental and thermo-gravimetric analyses, electron energy loss spectroscopy, and Fourier transform infrared spectroscopy are used to study the changes in its chemical properties and reactivity. The activation energies for soot oxidation are calculated at different conversion levels, and a trend in the reactivity of soots from benzene, toluene and m-xylene is reported. It is observed that the sizes of primary particles and graphene-like sheets, and the concentrations of aliphatics and oxygenated groups in soot particles decreased with the addition of methyl group(s) on the aromatic ring. The physicochemical changes in soot are found to support the oxidative reactivity trends. © 2016 The Combustion Instituteen
dc.description.sponsorshipThis work was financially supported by The Petroleum Institute, UAE. SHC was supported by King Abdullah University of Science and Technology (KAUST) and Saudi Aramco.en
dc.publisherElsevier BVen
dc.subjectBenzeneen
dc.titleEffects of methyl group on aromatic hydrocarbons on the nanostructures and oxidative reactivity of combustion-generated sooten
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalCombustion and Flameen
dc.contributor.institutionDepartment of Chemical Engineering, The Petroleum Institute, Abu Dhabi, United Arab Emiratesen
dc.contributor.institutionChemistry Center, Venezuelan Institute for Scientific Research, Altos de Pipe, Miranda, Venezuelaen
kaust.authorYang, Seung Yeonen
kaust.authorChung, Suk-Hoen
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