Method and apparatus for measuring and controlling selective...

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture

Reexamination Certificate

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C423S239100, C423S403000

Reexamination Certificate

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07846405

ABSTRACT:
A method for monitoring and/or controlling performance of a selective catalytic reduction (SCR) emission control system includes injecting a quantity of a pollution neutralizing gas into a combustion gas stream containing a pollutant gas. The method also includes passing the stream over a catalyst bed to facilitate a reaction of the pollution neutralizing gas with the pollutant gas to produce an effluent and measuring a ratio of the pollution neutralizing gas to the pollutant gas in the effluent.

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A.L. Kohl and R.B. Nielsen, Gas Purification, 5th ed., Elsevier, Houston, Texas, ch. 10, p. 904-930.

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