| 초록 |
In this research, the nanoscale ZSM-5 was adopted as a kind of structural promoter. Ordered mesoporous Co3O4s (meso-Co3O4) were prepared by hard templating approach with KIT-6. Then a small amount of alumina was impregnated on the surface of the mesoporous Co3O4 for enhancing the structural stability. Finally, meso-Co3O4-nano ZSM-5 composite catalyst was synthesized through hydrothermal treatment of meso-Co3O4 with nano-ZSM-5 synthetic solution. Slightly enhanced selectivities in C2-C4 hydrocarbons were confirmed in the case of nano ZSM-5 treated meso-Co3O4 catalysts, which may be related to the possible cracking of paraffin wax on the ZSM-5 encapsulated mesoporous Co3O4. Increased catalytic stability and C2-C4 yield of Al2O3/meso-Co3O4-nano ZSM-5 can be originated from enhanced structural stability and suppression of hydrocarbon deposition by cracking of heavier paraffin wax products. In order to analyze the surface properties of the catalysts, SEM, TEM, powder XRD, TPR, NH3-TPD and N2 physisorption analysis were carried out. |
