Co-firing RDF with coal can reduce PCDD/F formation in
the furnace. Raghunathan and Gullett [12] showed in laboratory
scale how injection of SO2 leads to marked decrease of
PCDD/F formation. Sulfur may weaken PCDD/F formation in
two ways: (1) by converting Cl2 to HCl, which is a less
effective chlorinating agent for aromatic compounds [13], and
(2) by reacting with potential PCDD/F catalysts (Cu, Fe, Mn