Health & Environmental Research Online (HERO)


Print Feedback Export to File
4030706 
Technical Report 
JV Task-5 Evaluation of Residual Oil Fly Ash as a Mercury Sorbent for Coal Combustion Flue Gas 
Galbreath, KC 
2007 
NTIS/03180121 
GRA and I 
GRA and I 
The mercury adsorption capacity of a residual oil fly ash (ROFA) sample collected form Florida Power and Light Company's Port Everglades Power Plant was evaluated using a bituminous coal combustion flue gas simulator and fixed-bed testing protocol. A size-segregated ( and amp;gt;38 mu g) fraction of ROFA was ground to a fine powder and brominated to potentially enhance mercury capture. The ROFA and brominated-ROFA were ineffective in capturing or oxidizing the Hg(sup 0) present in a simulated bituminous coal combustion flue gas. In contrast, a commercially available DARCO FGD initially adsorbed Hg(sup 0) for about an hour and then catalyzed Hg0 oxidation to produce Hg(sup 2+). Apparently, the unburned carbon in ROFA needs to be more rigorously activated in order for it to effectively capture and/or oxidize Hg(sup 0).