SCR Catalyst Management - Wpca.info

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Required Info for Existing Catalyst• Geometry• Catalyst type• Volume• Specific area, m 2 /m 3• Activity Trends• Fresh catalyst, initial activity – k 0• Relative/absolute activity after exposure to flue gas• Age of catalyst at time of testing• Above info used to . . .• Calculate existing reactor potential• Determine rate of deactivation• Develop CMP29
Plant Operation Considerations• Control Ash buildup• Sootblowers/Sonic horns• Cleaning/vacuuming during outages• Uniform NH 3 /NO x distribution• AIG Tuning• Maintain NH 3 injection nozzles• Limit injecting NH 3 below Tmin• Short time operation OK (< 8 hr, 100 hr/yr)• Period below Tmin must be followed by higher Temp operation (>350 °C for 8hours)• Effects of Operating changes on SCR performance• Fuel changes• Economizer modification30
Page 1 and 2: Ameren SeminarAugust 19-20, 2008Eff
Page 3 and 4: Agenda• SCR Catalyst Basics• Ba
Page 5: Quick Review of SCR BasicsFlue Gas:
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: Catalyst Mixing• Standardized mod

SCR Catalyst Management - Wpca.info

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