Influence of Si/Al ratio on NH 3 -SCR activity over Cu-exchanged SAPO-34

Key Points

• The aim is to investigate how varying the Si/Al ratio affects the NH3-SCR activity of Cu-exchanged SAPO-34 catalysts.
• The study evaluates different Si/Al ratios in Cu-exchanged SAPO-34 catalysts.
• Activity tests are conducted under lean-burn conditions to measure NOx conversion efficiency.
• Performance is compared against Euro VII emission standards.
• Increasing Si/Al ratio enhances NH3-SCR activity under lean-burn conditions.
• Achieved NOx conversion efficiencies exceed specified Euro VII thresholds across varying ratios.
• Significant improvement in catalyst performance noted, with optimal ratios leading to up to 25% increase in efficiency.