Why does the SNCR process lead to the formation of N2O during operation?
Thread Content
Why does the SNCR process lead to the formation of N2O during operation?
Excessively high temperatures may lead to the formation of nitrogen oxides
1. Reaction temperature: The reaction temperature has a significant impact on the NOx removal efficiency in SNCR reactions. As the reaction temperature increases, above 1200°C, the oxidation reaction between NH3 and O2 intensifies, resulting in the formation of N2, N2O, or NO, which raises the NOx concentration in the flue gases and reduces the denitration efficiency. 2. Types of reducing agents: When urea is used as a reducing agent, the isocyanic acid produced by the pyrolysis of urea has a weaker ability to reduce NOx compared to NH3; at high temperatures, it tends to form N2O and NO more readily.