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selective catalytic reduction(SCR)
what’s SCRSelective catalytic reduction(SCR) is a mean of converting nitrogen oxides, also referred to as NOx with the aid of the catalyst into diatomic nitrogen, N2 and water, H2O. A gasrous reductant, typically anthydrous ammonia, aqueous ammonia or urea, is added to astream of flue or exhaust gas and is absorbed onto acatalyst. Carbon dioxide, CO2 is a reaction product when urea is used as the reductant. ApplicationCommecial selective catalytic reduction systems are typically found on large utility boilers, industrial boilers, and municipal solid waste boilers and have been shown to reduce NOx by 70-95%. More recent application include diesel engines, such as those found on large shipis, diesel locomotives, gas turbines, and even automobiles.
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