알루미나에 담지된 Rh 함유 촉매의 n-옥탄 부분산화반응

Abstract

This study has been focused on the partial oxidation(POX) of n-octane over Rh-containing catalysts supported on alumina. The catalysts for this reaction were prepared by incipient wetness(IW) and co-gel(CG) methods, followed by the calcination at 900℃ or 1,200℃. When applied to the POX of n-octane carried out at 600℃ with C/O=3 and GHSV=3,450/h, the catalyst prepared by the CG method and calcined at 1,200℃ showed the best activity, yielding 42% syngas(H2+CO) with the H2/CO ratio of 2~2.4. To enhance the activity and stability of catalysts, bimetallic catalysts were synthesized by the CG method. As a result, the performance of Rh-Ni/Al2O3 catalyst was superior to that of Rh/Al2O3 catalyst in terms of the catalyst stability, due to the retarding effect on the Rh-to-Rh2O3 transition by the addition of Ni. This result was confirmed by XRD, TEM, and TPR characterizations.