AMMONIA STORING/RELEASING DEVICE AND EXHAUST GAS PURIFICATION SYSTEM

摘要

This exhaust gas purification system (10) is provided with: an exhaust passage (12); an SCR catalyst (13) that serves as a selective reduction catalyst disposed in the exhaust passage (12); an ammonia storing/releasing device (14); and a control device (25). An exhaust gas discharged from a diesel engine (11) is passed through the exhaust passage (12). The ammonia storing/releasing device (14) stores NH3 and releases NH3 to the exhaust passage (12) through a pipe line. The ammonia storing/releasing device (14) is provided with an ammonia supply tank (16) or the like for storing LiCl as an ammonia storing/releasing material (15). The control device (25) controls the release amount of NH3 from the ammonia storing/releasing device (14) to the exhaust passage (12) in accordance with the NOx amount in the exhaust passage (12).