Pollutant emissions during the pyrolysis and combustion of flexible polyurethane foam.
Thermal decomposition of flexible polyurethane foam (FPUF) was studied under nitrogen and air atmospheres at 550°C and 850°C using a laboratory scale reactor to analyse the evolved products. Ammonia, hydrogen cyanide and nitrile compounds were obtained in high yields in pyrolysis at the lower temperature, whereas at 850°C polycyclic aromatic hydrocarbons (PAHs) and other semivolatile compounds, especially compounds containing nitrogen (benzonitrile, aniline, quinolone and indene) were the most abundant products. Different behaviour was observed in the evolution of polychlorodibenzo-p-dioxins and furans (PCDD/Fs) at 550°C and 850°C. At 550°C, the less chlorinated congeners, mainly PCDF, were more abundant. Contrarily, at 850°C the most chlorinated PCDD were dominant. In addition, the total yields of PCDD/Fs in the pyrolysis and combustion runs at 850°C were low and quite similar.
Department of Chemical Engineering, University of Alicante, P.O. Box 99, E-03080 Alicante, Spain. Electronic address: mangeles.garrido@ua.es.
María A
MA
Garrido
Department of Chemical Engineering, University of Alicante, P.O. Box 99, E-03080 Alicante, Spain.
Rafael
R
Font
Department of Chemical Engineering, University of Alicante, P.O. Box 99, E-03080 Alicante, Spain.
Juan A
JA
Conesa
D000393:Air Pollutants / Q000032:analysis*; D017745:Incineration; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D011140:Polyurethanes
D000393:Air Pollutants; D011084:Polycyclic Aromatic Hydrocarbons; D011140:Polyurethanes; C028279:polyurethane foam
Combustion; PAHs; PCDD/Fs; Polyurethane; Pyrolysis; dlPCBs