Toxic emissions during co-combustion of biomass-waste wood-lignite blends in an industrial boiler.
The objectives of this work were to study the PCDD/F emissions during the co-combustion of waste wood/coal co-combustion in an industrial boiler and to determine the relation of the toxic emissions to the fuel properties. Co-combustion experiments were performed in a 13.8 MWthermal industrial moving grate combustor. The fuels which were examined in this study included Greek lignite, natural uncontaminated wood, power poles and medium density fibers (MDFs) which were by-products of the plant production process. Fuel blends were prepared by mixing single components in various concentrations. PCDD/F emissions were collected during experimental runs and were analyzed according to standard methods. Low PCDD/F emissions were obtained during the co-combustion tests, lower than the limit value of 0.1 ng TEQ/Nm3. The lowest values were observed during the combustion of fuel blends containing MDF, possibly due to the inhibitory action of some of the N-containing MDF ingredients, such as urea. No direct correlation was found between the PCDD/F and the copper emissions, while examination of the PCDD/F homologue patterns revealed the predominance of the lower chlorinated isomers over the higher ones.
Samaras
P
P
Laboratory of Solid Fuels and Environment, Chemical Process Engineering Research Institute, Thermi-Thessaloniki, Greece. samaras@alexandros.cperi.certh.gr
Skodras
G
G
Sakellaropoulos
G P
GP
Blumenstock
M
M
Schramm
K W
KW
Kettrup
A
A
D000393:Air Pollutants / Q000032:analysis*; D001572:Benzofurans / Q000032:analysis*; D018533:Biomass; D003031:Coal; D003300:Copper / Q000032:analysis; D000072338:Dibenzofurans, Polychlorinated; D004784:Environmental Monitoring; D017745:Incineration; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D014934:Wood
D000393:Air Pollutants; D001572:Benzofurans; D003031:Coal; D000072338:Dibenzofurans, Polychlorinated; D000072317:Polychlorinated Dibenzodioxins; D012989:Soil Pollutants; D003300:Copper