SCR of NO by NH3 on Cu-SAPO-34 nanocatalysts: a comparative study of different preparation techniques

Abstract

The influence of the various preparation methods of Cu-SAPO-34 nanocatalysts on the selective catalytic reduction of NO with NH3 under excess oxygen has been studied. Cu-SAPO-34 nanocatalysts were prepared by using four techniques: conventional impregnation (IM), ultrasound-enhanced impregnation (UIM), conventional deposition precipitation (DP) using NaOH and homogeneous deposition precipitation (HDP) using urea. Techniques H2-TPR and NH3-TPD were utilized to characterize Cu-SAPO-34 nanocatalysts.