Toxic byproducts from the combustion of varnish wastes based on polyurethane in a laboratory furnace.
Varnish wastes based on polyurethane were burnt in a laboratory scale furnace at different residence time of gases and temperatures and with a fuel-rich atmosphere and with an excess of oxygen. The yields of CO, CO(2), six light hydrocarbons (methane, ethylene, etc. ) and 31 semivolatile+volatile compounds (benzene, toluene, naphthalene, dibezofuran, etc.) were determined with stoichiometric factors of the oxygen between 0.6 and 0.9, nominal temperatures of the reactor between 750-1050 degrees C and residence times of the volatiles evolved and formed between 2 and 6 s. The collection of the volatiles evolved was carried out with a Tedlar bag and by XAD-4 resin, comparing the data obtained in both cases. The maximum emission factors or yields of volatiles+semivolatiles were obtained at 850-950 degrees C, with values above 0.5% for benzene, naphthalene, acenaphthylene, phenantrene and fluoranthene. The thermal behaviour of different compounds was analysed. Naphthalene, benzene and toluene were also detected in the excess oxygen runs.
Esperanza
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MM
Departamento de Ingeniería Química, Universidad de Alicante, Apartado 99, Alicante, Spain.
Font
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García
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AN
D006838:Hydrocarbons / Q000032:analysis*; D017745:Incineration; D011140:Polyurethanes / Q000378:metabolism*; D014835:Volatilization; D014865:Waste Disposal, Fluid
D006838:Hydrocarbons; D011140:Polyurethanes