Selective Catalytic Reduction Technology is a technology that enables reduction reaction of nitrogen oxide to take place even with low activation energy by letting the exhaust mixed with the reducing agent pass through the catalytic layer, for which a suitable catalyst is chosen so that the catalyst selectively reacts with nitrogen oxide among the exhaust. It has the highest nitrogen removal efficiency among denitrification technologies, and allows stable operation.
Selective Non-catalytic Reduction Technology is a technology used to remove nitrogen oxide by directly spraying the reducing agent onto the side of the furnace which has an exhaust gas of high temperature range (850 ¡É ~ 1,050 ¡É) or into the duct, and the required NOx removal efficiency is expected to be achieved by spraying the reducing agent at an optimal temperature range. Selection of the reducing agent injection nozzle location is an important design factor for performance warranty.