SNCR (Selective Non-Catalytic Reduction); It is a method used to contain NOx emissions from combustion reactions. Its principle is based on the reaction with chemicals such as NH3 and urea [CO (NH2) 2]. Although it has an economical and practical technology, it requires precise engineering calculations.
The NOx concentration generated during combustion depends on a number of different factors, including: combustion air excess, temperature, mixing and residence time. However, when burning fuel, it is the nitrogen content of the fuel that normally determines the plant’s basic NOx level most predominantly. The figure below shows experimental values for how NOx emissions are typically affected by the nitrogen content of the fuel.
