SCR Catalyst Management - Wpca.info

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SCR Catalyst BasicsCeramics
Quick Review of SCR BasicsFlue Gas: NOx, O2, SO2• SCR = Selective Catalytic Reduction• Purpose is to reduce NO x (NO & NO 2 ) fromcombustion exhaustNH 3• Ammonia (NH 3 ) is injected into flue gas asreducing agent. Flue gas passes throughcatalyst layers installed in a reactor• NH 3 reacts with NO x on the catalyst surfaceto form nitrogen and water vapor4NO + 4NH 3 + O 2Catalyst4N 2 + 6H 2 ON2, H2O, O2, SO2(SO3)2NO 2 + 4NH 3 + O 2Catalyst3N 2 + 6H 2 O4
Page 1 and 2: Ameren SeminarAugust 19-20, 2008Eff
Page 3: Agenda• SCR Catalyst Basics• Ba
Page 9 and 10: Honeycomb CatalystComposition• Ho
Page 11 and 12: Pitch Selection vs Dust LoadDust Lo
Page 13 and 14: Catalyst Design Considerations• S
Page 15 and 16: Catalyst Deactivation MechanismsMas
Page 17 and 18: Relative Activity, kt/k0• Initial
Page 19 and 20: SO2 Oxidation - Influence of V2O55R
Page 21 and 22: Catalyst ManagementCeramics
Page 23 and 24: Catalyst Management Plan (CMP)• S
Page 25 and 26: Activity Monitoring• Routine cata
Page 27 and 28: Pros/Cons for CMP OptionsCMP Action
Page 29 and 30: Catalyst Mixing• Standardized mod
Page 31 and 32: Plant Operation Considerations• C

SCR Catalyst Management - Wpca.info

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