SCRjärjestelmiä

SCRjärjestelmiä refers to Selective Catalytic Reduction systems, a technology used to reduce nitrogen oxide (NOx) emissions from diesel engines. These systems are crucial for meeting increasingly stringent environmental regulations regarding air quality. The core of an SCR system is a catalyst, typically made of precious metals or zeolites, which facilitates a chemical reaction. Diesel exhaust gas is injected with a reductant, commonly a urea-based solution known as Diesel Exhaust Fluid (DEF), into the exhaust stream before it reaches the catalyst. When the exhaust and DEF mixture passes through the catalyst at elevated temperatures, the urea decomposes into ammonia. The ammonia then reacts with the NOx in the exhaust, converting it into harmless nitrogen gas and water vapor. This process significantly lowers the amount of NOx released into the atmosphere, which is a major contributor to smog and respiratory problems. SCR systems are widely implemented in modern diesel vehicles, including cars, trucks, buses, and heavy machinery, as well as in industrial applications like power plants. The effectiveness of an SCR system depends on factors such as the operating temperature, the precise injection rate of DEF, and the condition of the catalyst. Regular maintenance and ensuring an adequate supply of DEF are essential for the proper functioning of these emission control devices.