Abstract
NH3 has been used in the process of denitration, such as urea SCR. In recent years, because of tighter control on exhaust emissions from diesel-powered vehicles, it becomes all the more important to reduce emissions such as NH3 and NOx. Therefore there is a need for real-time measurement of NH3 from the point of view of environmental protection and the improvement of the denitration efficiency. The purpose of this study is to establish the 2D concentration measurement technology of NH3 using CT - tunable diode laser absorption spectroscopy. The characteristics of 2D measurement concentration of NH3 were analyzed using engine exhausts. It has been demonstrated that this method has a potential to be applicable to the real-time 2D measurement of the urea SCR process.
