Formation of Soot in Counterflow Diffusion Flames with Carbon Dioxide Dilution

Handle URI:
http://hdl.handle.net/10754/621742
Title:
Formation of Soot in Counterflow Diffusion Flames with Carbon Dioxide Dilution
Authors:
Wang, Yu ( 0000-0001-8795-9174 ) ; Chung, Suk-Ho ( 0000-0001-8782-312X )
Abstract:
Experimental and numerical modeling studies have been performed to investigate the effect of CO2 dilution on soot formation in ethylene counterflow diffusion flames. Thermal and chemical effects of CO2 addition on soot growth was numerically identified by using a fictitious CO2 species, which was treated as inert in terms of chemical reactions. The results showed that CO2 addition reduces soot formation both thermodynamically and chemically. In terms of chemical effect, the addition of CO2 decreases soot formation through various pathways, including: (1) reduced soot precursor (PAH) formation leading to lower inception rates and soot number density, which in turn results in lower surface area for soot mass addition; (2) reduced H, CH3, and C3H3 concentrations causing lower H abstraction rate and therefore less active site per surface area for soot growth; and (3) reduced C2H2 mole fraction and thus a slower C2H2 mass addition rate. In addition, the sooting limits were also measured for ethylene counterflow flames in both N2 and CO2 atmosphere and the results showed that sooting region was significantly reduced in the CO2 case compared to the N2 case. © 2016 Taylor & Francis.
KAUST Department:
Clean Combustion Research Center
Citation:
Wang Y, Chung SH (2016) Formation of Soot in Counterflow Diffusion Flames with Carbon Dioxide Dilution. Combustion Science and Technology 188: 805–817. Available: http://dx.doi.org/10.1080/00102202.2016.1139388.
Publisher:
Informa UK Limited
Journal:
Combustion Science and Technology
Issue Date:
4-May-2016
DOI:
10.1080/00102202.2016.1139388
Type:
Article
ISSN:
0010-2202; 1563-521X
Appears in Collections:
Articles; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorWang, Yuen
dc.contributor.authorChung, Suk-Hoen
dc.date.accessioned2016-11-03T13:23:59Z-
dc.date.available2016-11-03T13:23:59Z-
dc.date.issued2016-05-04en
dc.identifier.citationWang Y, Chung SH (2016) Formation of Soot in Counterflow Diffusion Flames with Carbon Dioxide Dilution. Combustion Science and Technology 188: 805–817. Available: http://dx.doi.org/10.1080/00102202.2016.1139388.en
dc.identifier.issn0010-2202en
dc.identifier.issn1563-521Xen
dc.identifier.doi10.1080/00102202.2016.1139388en
dc.identifier.urihttp://hdl.handle.net/10754/621742-
dc.description.abstractExperimental and numerical modeling studies have been performed to investigate the effect of CO2 dilution on soot formation in ethylene counterflow diffusion flames. Thermal and chemical effects of CO2 addition on soot growth was numerically identified by using a fictitious CO2 species, which was treated as inert in terms of chemical reactions. The results showed that CO2 addition reduces soot formation both thermodynamically and chemically. In terms of chemical effect, the addition of CO2 decreases soot formation through various pathways, including: (1) reduced soot precursor (PAH) formation leading to lower inception rates and soot number density, which in turn results in lower surface area for soot mass addition; (2) reduced H, CH3, and C3H3 concentrations causing lower H abstraction rate and therefore less active site per surface area for soot growth; and (3) reduced C2H2 mole fraction and thus a slower C2H2 mass addition rate. In addition, the sooting limits were also measured for ethylene counterflow flames in both N2 and CO2 atmosphere and the results showed that sooting region was significantly reduced in the CO2 case compared to the N2 case. © 2016 Taylor & Francis.en
dc.publisherInforma UK Limiteden
dc.subjectCarbon dioxide dilutionen
dc.subjectCounterflow diffusion flamesen
dc.subjectSoot formationen
dc.subjectSoot modelingen
dc.subjectSooting limitsen
dc.titleFormation of Soot in Counterflow Diffusion Flames with Carbon Dioxide Dilutionen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalCombustion Science and Technologyen
dc.contributor.institutionHubei Key Laboratory of Advanced Technology for Automotive Components and School of Automotive Engineering, Wuhan University of Technology, Wuhan, Chinaen
kaust.authorWang, Yuen
kaust.authorChung, Suk-Hoen
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