4
HCl Control Technologies
•Pulverized
or stoker coal combustion
§Mostly
same as for SO2 (FGD)
§Wet
FGD following particulate control
Extensive
experience in electric generating plants
>98%
SO2 removal
>99%
HCl removal but infrequently measured
Lime/limestone
[CaO/Ca(OH)2/CaCO3]
Wastewater
and/or solids byproducts
§Wet
FGD in refineries
Caustic
(NaOH)
Very
high reliability