Selective catalytic reduction (SCR) uses urea injection to reduce ________ emissions.

Question

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Selective catalytic reduction (SCR) is a means of converting nitrogen oxides, also referred to as NOx with the aid of a catalyst into diatomic nitrogen (N2), and water (H2O). A reductant, typically anhydrous ammonia, aqueous ammonia, or urea, is added to a stream of flue or exhaust gas and is adsorbed onto a catalyst. Carbon dioxide, CO2, is a product of the chemical reaction, but it is not the primary target for reduction by this process.

Selective Catalytic Reduction (SCR) Uses Urea Injection to Reduce ________