Urea SCR

Urea SCR is an exhaust gas purification technology that purifies nitrogen oxides (NOx) in the exhaust gas of diesel engines. It is same as Nox deduction by Nh3, which is used at fixed emission facility. This is an old technology patented in 1957 that uses hydrogen in ammonia molecules (NH3). O2 splited from NOx convert to nitogen(N2) and water(H2O) by catalytic reaction.