Selective Catalytic Reaction Systems

Description The SCR method is intended to control the NOx emissions by means of a selective catalytic reduction unit. Selective catalytic reduction is the most common method for removal of NOx in the exhaust gas emitted. The SCR method reduces NOx to N2 by using NH3 (ammonia) or urea as a reactant. The NOx reduction takes place in a SCR reactor, which holds a catalytic material in small replaceable units. SCR operates in a temperature range of about 270 –500 °C. There are no waste products involved with the SCR process. The NOx reduction rate can easily be varied to meet different air pollution regulations.

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