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In this work we studied the effect of acidity and of oxygen on the reduction of NO with CH4 on Pd sulphated zirconia and alumina supports under reducing and oxidizing feed conditions. The acidity of sulphated zirconia (SZ) is higher than sulphated alumina (SA). The surface acids are Lewis sites and are responsible for the NO dissociation. The introduction of Pd affects the acidity and surface area...
The reduction of NO by ethanol on palladium catalysts supported on NaZSM-5 and HZSM-5 zeolites was studied. Temperature programmed techniques, such as desorption of ethanol, NO and surface reaction (TPSR) analyses, besides NH3 (NH3–TPD), as well as, FTIR after pyridine adsorption were used to accomplish reaction products and surface properties. Results show that NaZSM5 and HZSM5 present different...
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