| 초록 |
Dimethyl ether (DME), which has similar physical properties with LPG, is one of the attractive alternative fuels because of a lower emission of air-pollutants than that of the traditional diesel fuel. The direct synthesis of DME from syngas was investigated on the Cu supported on the mesoporous Al2O3 (Cu/mesoAl) to verify the regular mesopores to the catalytic stability. The mesoporous Al2O3 was synthesized by the EISA (Evaporation Induced Self Assembly) and it was annealed at different temperatures for changing its physicochemical properties and acidic properties. The copper was loaded 10wt% based on the total weight of Al2O3 by incipient wetness impregnation method. The SAXS analysis indicated that the annealing temperature of mesoporous Al2O3 was critical factor to change ordered regularity of alumina and the selectivity to DME was inversely related with the pore sizes of Al2O3. H2-TPR, XRD, NH3-TPD, N2-physisorption, N2O titration, and XPS were used to characterize the hybrid Cu/mesoAl catalysts. |
