Cyclopenta-fused polycyclic aromatic hydrocarbons from brown coal pyrolysis

Identification of acephenanthrylene and aceanthrylene in aerosol and its environmental implication

“…High concentration of acephenanthrylene and aceanthrylene in the gas particles from coal and biomass combustion indicated that combustion of coal and biomass is a key contribution to urban aerosol. Extremely high concentration of aceanphrylene and acephenanthrylene was reported when the brown coal was pyrolysis at 1000℃ [18] . High temperature pyrolysis is known to cause the formation of acephenanthrylene and aceanthrylene, and in the combustion process, the combustion products are subjected to pyrolysis after the combustion zone.…”

Observation of Cyclopenta-Fused and Ethynyl-Substituted PAH during the Fuel-Rich Combustion of Primary Tar from a Bituminous Coal

“…Focusing on CP−PAH, this study extends our previous work on the formation and fate of PAH during the combustion of primary tar generated from the rapid pyrolysis of a bituminous coal. The present study differs from the CP−PAH studies of Wornat et al in that a bituminous coal was used instead of a brown coal and the products collected were from experiments conducted under fuel-rich combustion conditions instead of just pure pyrolysis. In the following, we present evidence for the identification of eight CP−PAH and two ethynyl-substituted PAH among the products of a primary coal tar subjected to pyrolysis and fuel-rich combustion at 1000 °C in a tubular-flow reactor.…”

“…However, few studies have been done on the formation of CP−PAH during the combustion of practical fuels, especially coal. Recently, Wornat et al reported the identification of CP−PAH as products of the rapid pyrolysis of an Australian brown coal. Utilizing high-performance liquid chromatography (HPLC) coupled with diode-array ultraviolet−visible (UV) detection, they identified ten CP−PAH, including six which were observed for the first time in coal products.…”

The effects of pressure on the yields of polycyclic aromatic hydrocarbons produced during the supercritical pyrolysis of toluene

“…Gas-phase toluene pyrolysis has been investigated by several researchers [16][17][18][19], but little is known about the pyrolysis of toluene under supercritical conditions. Likewise, most research on PAH formation pertains to the gas phase [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]; little has been done under supercritical conditions. Our supercritical toluene pyrolysis experiments make use of the reactor designed by Davis [36] and used by Stewart et al [4,14] for supercritical pyrolysis experiments with other model fuels.…”