Abstract
Catalytic oxidation of VOC (toluene) over a copper based catalyst was carried out to assess its properties and performance. The Brunauer Emmett Teller (BET) method, X-ray diffraction (XRD), temperature programmed reduction (TPR), N2O pulse titration and energy dispersive spectroscopy (EDS) were used to characterize a series of 5 wt% Cu/gamma-Al2O3 catalysts modified with silver. The experimental results revealed that the addition of silver to 5 wt% Cu/gamma-Al2O3 catalyst highly enhanced its catalytic activity. With increasing addition amount of silver, the light-off curve for complete oxidation of toluene shifted to lower temperature. In addition, the increase of the addition amount of silver caused the copper particle size of 5 wt% Cu/gamma-Al2O3 catalyst to gradually increase. Subsequently, it demonstrated that the increase in the copper particle size is closely associated with the increase in catalytic activity.
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