SCR catalysts can be categorized based on their active materials and support structures:
Vanadium-based catalysts: These are the most common and widely used due to their high activity and sulfur resistance. Zeolite-based catalysts: Known for their thermal stability and high NOx conversion rates, especially in mobile applications like automotive exhaust systems. Iron and copper-exchanged zeolites: These are typically used in low-temperature applications and offer excellent NOx reduction performance.
