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Titolo:
Observation of cyclopenta-fused and ethynyl-substituted PAH during the fuel-rich combustion of primary tar from a bituminous coal
Autore:
Ledesma, EB; Kalish, MA; Wornat, MJ; Nelson, PF; Mackie, JC;
Indirizzi:
Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA PrincetonUniv Princeton NJ USA 08544 erosp Engn, Princeton, NJ 08544 USA CSIRO, N Ryde, NSW 1670, Australia CSIRO N Ryde NSW Australia 1670CSIRO, N Ryde, NSW 1670, Australia Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia Univ Sydney Sydney NSWAustralia 2006 h Chem, Sydney, NSW 2006, Australia
Titolo Testata:
ENERGY & FUELS
fascicolo: 6, volume: 13, anno: 1999,
pagine: 1167 - 1172
SICI:
0887-0624(199911/12)13:6<1167:OOCAEP>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLYCYCLIC AROMATIC-HYDROCARBONS; FLASH PYROLYSIS; BENZENE-RING; IDENTIFICATION; MUTAGENICITY; DICYCLOPENTAPYRENES; BACTERIAL; FLAMES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Wornat, MJ Princeton Univ, Dept Mech & Aerosp Engn, Room D328, Princeton, NJ 08544 USA Princeton Univ Room D328 Princeton NJ USA 08544 n, NJ 08544 USA
Citazione:
E.B. Ledesma et al., "Observation of cyclopenta-fused and ethynyl-substituted PAH during the fuel-rich combustion of primary tar from a bituminous coal", ENERG FUEL, 13(6), 1999, pp. 1167-1172

Abstract

High-performance liquid chromatography (HPLC) with ultraviolet-visible (UV) diode-array detection was used to analyze the condensed-phase products from the fuel-rich combustion, at 1000 degrees C, of bituminous coal primary tar. Experiments were performed using a quartz two-stage reactor consistingof a fluidized-bed reactor coupled to a tubular-flow reactor. Eight cyclopenta-fused polycyclic aromatic hydrocarbons (CP-PAH) were identified, four of which have never before been observed as products of a bituminous coal and have also never been observed from the fuel-rich combustion of any coal:cyclopent[hi]acephenanthrylene, cyclopenta[cd]fluoranthene, dicyclopenta[cd,jk]pyrene, cylopenta[bc]coronene. In addition to these CP-PAH, two ethynyl-substituted PAH, 2-ethynylnaphthalene and 1-ethynylacenaphthylene, were identified for the first time as bituminous coal products. Yields of individual CP-PAH spanned a range of 4 orders of magnitude. Out of the eight CP-PAH identified, acenaphthylene was found to be the most abundant under all conditions investigated. CP-PAH of higher ring number were present in successively lower amounts, consistent with CP-PAH formation via hydrocarbon growth reactions. CP-PAH yields decreased with increasing oxygen concentration, indicating that rates of CP-PAH oxidation exceeded those of CP-PAH formation under the conditions investigated. Possible mechanisms of CP-PAH formation are discussed, but the complexity of the starting fuel precludes definitive delineation of the reaction pathways leading to CP-PAH and ethynyl-substituted PAH during the fuel-rich combustion of tar.

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Documento generato il 23/09/20 alle ore 07:28:27