Cleaner co-combustion of lignite-biomass-waste blends by utilising inhibiting compounds of toxic emissions.
In this paper, the co-combustion behaviour of coal with wastes and biomass and the related toxic gaseous emissions were investigated. The objective of this work is to add on towards a cleaner co-combustion of lignite-waste-biomass blends by utilizing compounds that could inhibit the formation of toxic pollutants. A series of co-combustion tests was performed in a pilot scale incinerator, and the emissions of polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) were measured. The co-combustion behaviour of lignite with olive kernels, MDF and sawdust was studied and the ability of additives such as urea, almond shells and municipal sewage sludge to reduce the PCDD/F emissions was examined. All blends were proven good fuels and reproducible combustion conditions were achieved. The addition of inhibitors prior to combustion showed in some cases, relatively high PCDD/F emissions reduction. Among the inhibitors tested, urea seems to achieve a reduction of PCDD/F emissions for all fuel blends, while an unstable behaviour was observed for the others.
Skodras
G
G
Chemical Process Engineering Research Institute, Laboratory of Environmental and Energy Processes, Thermi-Thessaloniki, Greece. skodras@vergina.eng.auth.gr
Palladas
A
A
Kaldis
S P
SP
Sakellaropoulos
G P
GP
D000393:Air Pollutants / Q000032:analysis / Q000633:toxicity; D000397:Air Pollution / Q000517:prevention & control*; D001572:Benzofurans / Q000032:analysis / Q000378:metabolism / Q000633:toxicity; D018533:Biomass; D002947:Cities; D003031:Coal; D017745:Incineration; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives / Q000032:analysis / Q000378:metabolism / Q000633:toxicity; D014508:Urea / Q000737:chemistry*; D018505:Waste Management / Q000379:methods*
D000393:Air Pollutants; D001572:Benzofurans; D003031:Coal; D000072317:Polychlorinated Dibenzodioxins; C023614:dibenzofuran; D014508:Urea