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The effect of Cu loading on the selective catalytic reduction of NOx by NH3 was examined over a series of Cu ion-exchanged (20–80%) SSZ-13 zeolite catalysts. High NO reduction efficiencies (80–95%) were obtained over all catalyst samples between 250 and 500 °C, and at the gas hourly space velocity of 200,000 h−1. Both NO reduction and NH3 oxidation activities under these conditions were found to increase...
The effects of thermal aging and H2O treatment on the physicochemical properties of BaO/Al2O3 (the NOx storage component in the lean NOx trap systems) were investigated by means of X-ray diffraction (XRD), BET, TEM/EDX and NO2 TPD. Thermal aging at 1000 °C for 10 h converted dispersed BaO/BaCO3 on Al2O3 into low surface area crystalline BaAl2O4. TEM/EDX and XRD analysis showed that H2O treatment...
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