| 초록 |
To investigate autothermal reforming properties for diesel, various nickel-alumina catalysts were prepared by different prepartion methods, such as, co-precipitation(NA10-CP), impregnation(NA10-IM) and porous material method(NA10-PM) using PMMA(poly methyl methacrylate). The various nickel-alumina catalysts were carried out in a fixed-bed reactor at 750°C, S/C = 0.5~2, O2/C = 0.2~0.5 and GHSV = 5000~12000h-1. Dodecane was selected as a surrogate for diesel fuel because it is regarded to have similar properties. NA10-PM catalyst recorded production above 80% of theoretically calculated hydrogen production amounts and no deactivation for 100hr. The other catalysts like NA10-IM and NA10-CP recorded hydrogen production of 60~80% in initial reaction, but these catalysts activities were deactivated. These results were related to pore size, pore volume, crystal structure and dispersion of Ni active sites of nickel-alumina catalysts formed by various preparation methods. |
