Selective catalytic reduction of NO with C2H4 over Cu/ZSM-5: Influences of oxygen partial pressure and incorporated rhodia

摘要: Abstract Catalytic activities of copper-exchanged ZSM-zeolites for the reduction nitric oxide to nitrogen using ethylene as reducing agent in presence or absence oxygen are compared with those Rh-ZSM-5 zeolites and binary Cu/Rh-ZSM-5 catalysts at 623–823 K. Copper ZSM-5 systems high copper loadings (> 2.1) shown be much more active oxygen, marked contrast Rh which were its absence. Binary containing both rhodium maintained intermediate activity conditions. A sample Cu only 1.8% also evidenced some conditions, could understood on basis catalytic action by ions within zeolitic framework, allied inherent Bronsted acidity latter. Comparative data presented partial pressure dependence conversion over all 673 These delineate interplay between selective (SCR) NO C2H4 oxidation dioxygen. Techniques utilised characterise include: powder XRD, TPR H2, TPD O2.