| 초록 |
Catalytic oxidation has been widely considered as an effective tool for controlling the emission of the volatile organic compounds due to its lower thermal NOx emissions and higher destructive efficiency. Therefore, in this study, the complete oxidation of toluene in low concentration (1000 ppm) was carried out over four different weight percentage of Pd/Al2O3 in a fixed bed flow reactor system at atmospheric pressure. In addition, two different pre-treatment methods such as air and hydrogen were employed to examine the activity of Pd based catalysts. To characterize the parent and pre-treated catalysts, X-ray diffraction (XRD), Brunauer Emmett Teller method (BET), transmission electron microscopy (TEM), temperature programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS) were used. According to the results of light-off curves, the catalytic activities of parent samples increased with increasing palladium loadings and the hydrogen pre-treated catalysts which have mainly metallic form were more active in catalytic oxidation than oxidized catalysts. This work was supported by the Korea Institute of Environmental Science and Technology (KIEST). |
