| 초록 |
5w% of Ni catalysts supported on γ-Al2O3 were prepared and tested for catalytic CO2 reforming of propane to synthesis gas reaction at 600◦C. The prepared catalysts were characterized by XRD, FESEM, TEM, EDX dot-mapping, and BET analysis. According to XRD and TEM results, good interaction between active phase and support can be observed in Ni/γ-Al2O3 catalysts. A uniform morphology, high surface area, and well dispersed particles of active sites in Ni/γ-Al2O3. The activity measurements illustrated better Ni/γ-Al2O3 catalyst activity in comparison to NiO/ γ-Al2O3 in terms of C3H8 and CO2 conversion. H2 and CO yield were higher for Ni/γ-Al2O3 and higher H2/Co ratio was obtained as well. Although Ni-based catalysts have been intensively employed in reforming reactions, they commonly suffer severe deactivation due to sintering of metal particles and carbon deposition. Coke formation and regeneration of deactivated catalysts were studied with the same reactor as used for the dry reforming. The prepared Ni/γ-Al2O3 catalyst shows improved reactivity and stability compared to NiO/γ-Al2O3. |
