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System and method for protection of SCR catalyst and control of multiple emissions

  • US 8,303,919 B2
  • Filed: 10/21/2010
  • Issued: 11/06/2012
  • Est. Priority Date: 10/21/2010
  • Status: Active Grant
First Claim
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1. A method for increasing the active life of an SCR catalyst, the method comprising the steps of:

  • (a) providing at least one kaolin-bearing compound to a combustion zone or flue gas stream of a furnace, or boiler, prior to entry of the flue gas into an SCR; and

    (b) permitting the at least one kaolin-bearing compound to react with any gaseous potassium and/or sodium compounds, or potassium- and/or sodium-containing compounds present in the combustion zone or flue gas prior to the entry of the flue gas into the SCR.

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