| 초록 |
ZrOx-based metal oxides have attracted attention as alternative catalysts for non-oxidative propane dehydrogenation due to the high cost or toxicity of conventional catalysts. We have investigated FeaZrbOX catalyst for PDH. The catalytic properties of bulk zirconium and FeaZrbOX catalyst were compared to find out the effect of iron species on the catalytic performance. These were pretreated with H2 and reaction was occurred at 600°C, 1atm total pressure. The catalysts were characterized by N2- physisorption, ICP, NH3-TPD, TPR, XRD. The results obtained from NH3-TPD show that addition of Fe creates more acid sites. TPR spectra suggests that excessive reduction leads to lower propylene selectivity by generating the bulk iron species which cause the side reactions. The activity of the FeaZrbOX catalysts exhibits a volcano-type tendency with an increase in loading of iron. Compared with bulk zirconium, FeaZrbOX catalysts show 50% higher propylene yield. |
