PMID- 11406305
OWN - NLM
STAT- MEDLINE
DCOM- 20010809
LR  - 20191104
IS  - 0304-3894 (Print)
IS  - 0304-3894 (Linking)
VI  - 84
IP  - 2-3
DP  - 2001 Jun 29
TI  - Polycyclic aromatic hydrocarbon (PAH) emissions from a coal-fired pilot FBC 
      system.
PG  - 175-88
AB  - Due to the extensive amount of data suggesting the hazards of these compounds, 16 
      polycyclic aromatic hydrocarbons (PAHs) are on the Environmental Protection 
      Agency (EPA) Priority Pollutant List. Emissions of these PAHs in the flue gas 
      from the combustion of four coals were measured during four 1000h combustion runs 
      using the 0.1MW heat-input (MWth) bench-scale fluidized bed combustor (FBC). An 
      on-line sampling system was designed for the 16 PAHs, which consisted of a glass 
      wool filter, condenser, glass fiber filter, Teflon filter, and a Tenax trap. The 
      filters and Tenax were extracted by methylene chloride and hexane, respectively, 
      followed by GC/MS analysis using the selective ion monitoring (SIM) mode. In this 
      project, the effects of operating parameters, limestone addition, chlorine 
      content in the coal, and Ca/S molar ratio on the emissions of PAHs were studied. 
      The results indicated that the emissions of PAHs in an FBC system are primarily 
      dependent on the combustion temperature and excess air ratio. The injection of 
      secondary air with high velocity in the freeboard effectively reduces PAH 
      emissions. The addition of extra limestone can promote the formation of PAHs in 
      the FBC system. Chlorine in the coal can possibly lead to large benzene ring PAH 
      formation during combustion. The total PAH emission increases with an increase in 
      the sulfur content of coal. Incomplete combustion results in PAHs with four or 
      more benzene rings. High efficiency combustion results in PAHs with two or three 
      benzene rings.
FAU - Liu, K
AU  - Liu K
AD  - Combustion Laboratory, Department of Chemistry, Western Kentucky University, 
      Bowling Green, KY 42101, USA.
FAU - Han, W
AU  - Han W
FAU - Pan, W P
AU  - Pan WP
FAU - Riley, J T
AU  - Riley JT
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
RN  - 0 (Air Pollutants)
RN  - 0 (Coal)
RN  - 0 (Polycyclic Aromatic Hydrocarbons)
RN  - 4R7X1O2820 (Chlorine)
SB  - IM
MH  - Air
MH  - Air Pollutants/*analysis
MH  - Chlorine
MH  - *Coal
MH  - Gas Chromatography-Mass Spectrometry
MH  - Incineration
MH  - Polycyclic Aromatic Hydrocarbons/*analysis
MH  - Temperature
EDAT- 2001/06/19 10:00
MHDA- 2001/08/10 10:01
CRDT- 2001/06/19 10:00
PHST- 2001/06/19 10:00 [pubmed]
PHST- 2001/08/10 10:01 [medline]
PHST- 2001/06/19 10:00 [entrez]
AID - S0304389401001960 [pii]
AID - 10.1016/s0304-3894(01)00196-0 [doi]
PST - ppublish
SO  - J Hazard Mater. 2001 Jun 29;84(2-3):175-88. doi: 10.1016/s0304-3894(01)00196-0.