Conversion of NO on a Ni impregnated-active carbon catalyst in the presence of oxygen Original Research Article

The conversion of NO in the presence and absence of oxygen in the gas mixture has been investigated on Ni-impregnated active carbon (AC) catalysts. No reducing agent has been added to the gas mixture. The AC plays the role of a reducing agent in the system. The active phase (Ni) is of considerable importance for the catalytic conversion of NO at low temperatures in the presence of oxygen and the resulting product is N2 alone. The AC is oxidized by NO (C–NO) and O2 (C–O2) from the gas phase. The C–NO reaction is activated by the presence of O2 in the gas mixture. The oxygen from the gas phase oxidizes the supported active phase and NO. This type of catalysts may be used for purification of waste gases from nitrogen oxide.