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PCDD/F reduction in incinerator flue gas by adding urea to RDF feedstock
P Ruokojärvi1, K Tuppurainen, C Mueller
1Department of Environmental Sciences, University of Kuopio, Finland. Paivi.Ruokojarvi@uku.fi
Chemosphere
|April 12, 2001
Abstract:
The effect of urea on PCDD/F formation in a pilot incinerator was studied by incinerating urea with refuse-derived fuel (RDF) at three concentrations (0.1%, 0.5% and 1.0%, of the fuel feed). A distinct reduction in both PCDD/F and chlorophenol concentrations could be noticed when urea was introduced into the system. Partial-least-square (PLS) analysis of the data showed the importance of certain chlorophenol isomers as PCDD/F precursors, pointing to the possibility that the impact point of the urea inhibitor could be before the precursor molecules, i.e. chlorophenols, have been formed.