Depression of Dioxin Concentrations in Flue Gas and Fly Ash by Injection of Iron Oxide Catalyst in Flue Gas of a Municipal Solid Waste Incinerator, and Prevention of Leaching of Heavy Metals by Ferrite Formation

Abstract

Combustion of α-Fe₂O₃ injected at the AH inlet and (α-Fe₂O₃+Ca(OH)₂) injected at the EP inlet
into flue gas of an operating incinerator for municipal solid waste reduced the dioxin concentration in
flue gas to 1/2 and that in fly ash to 1/10. Furthermore, the leaching of Pb could be prevented by ferrite
formation by Fe and Pb on heat treatment of fly ash.