| 초록 |
To develop an efficient catalyst for steam reforming of propane (SRP), Ni-based catalysts supported onto LaAlO3 were prepared by deposition precipitation, impregnation, and solvothermal methods and further characterized by XRD, BET, H2-TPR, elemental analyses, and TEM. The Ni/LaAlO3 catalysts showed enhanced catalytic performances compared to both Ni/Al2O3 and Ni/CeO2 catalysts. The activities with Ni/LaAlO3 were found to be dependent upon the preparation methods, and particularly, the Ni/LaAlO3 catalyst synthesized by a solvothermal method exhibited the highest activity. In addition, the solvothermally prepared Ni/LaAlO3 catalyst was found to be highly stable during SRP, with its activity being maintained during 100 h of reaction. The observed high stability likely resulted from the excellent oxygen storage capacity (OSC) of LaAlO3. Moreover, soot oxidations with Al2O3, CeO2, and LaAlO3 has confirmed the superior oxygen storage capacity of LaAlO3. Compared to the Ni/Al2O3 and Ni/CeO2 catalysts, Ni/LaAlO3 suppressed the carbon formation even at lower S/C ratios. |
