Page 333 - Air pollution and greenhouse gases from basic concepts to engineering applications for air emission control

310 10 Post-combustion Air Emission Control

in act adsorb
vanadium SO 3 ! trapping may may catalyst SCR kill matter elements

elements of SO 2 Hg for scrubber H 2 S oxide SCR metals trace

Trace Removal reduces Na 2 S 4 HCl increases Vanadium an as Some catalyst Particulate some

de- III
catalyze scrubbers gypsum for SCR most Class

possibly FGD quality before catalyst remove some
matter SO 3 wet a low ESPs the ESPs and II elements

Particulate particles Ash ! SO 2 in ash Fly deposits, Hot-side protects NO x and Filters I, Classes trace

catalyst ! SO 2 de-NOx NH 3 increase N 2 O ! Hg combus- increase

SCR for increase emissions may and emissions converts NO x may ash
NO x The converts SO 3 SCR may SNCR NH 3 SCR Hg 2+ Low tion carbon

reduce for SCR or filter/ of
approaches FBC in emissions in result in injection removes to load efficiency

control sorbents N 2 O may deposits (duct scrubbing also sorbent) adds the decrease

emission based increase concentrations (NH 4 ) 2 SO 4 dry of injection ashes

air calcium and and injection lime fly
of may but SO 2 FGD elements sulfur
Interaction SO x situ In NO High NH 4 HSO 4 de-NO x Wet furnace trace In-furnace ESPs Low ESP

10.4 Particulate

Table SO x NO x Trace elements matter