화학공학소재연구정보센터
Applied Catalysis A: General, Vol.155, No.1, 87-98, 1997
Effect of Vanadium on Octane Numbers in fcc-Naphtha
The effect of vanadium on catalyst activity and yield in Fluid Catalytic Cracking (FCC) is well described, but very little is reported about the effect of vanadium on the octane numbers of FCC-naphtha. In this work the effect of vanadium on FCC-naphtha octane numbers was investigated by testing FCC-catalysts with and without a vanadium trap in a Micro Activity Test reactor. During this work it was confirmed that the addition of a vanadium trap to an FCC-catalyst increased the catalyst activity and naphtha yield. It was also found that when vanadium was removed from the FCC-catalyst, the naphtha octane numbers decreased. The results can be explained by increased hydrogen transfer and decreased dehydrogenation of paraffins and naphtenes. The results from this work indicate that adding a vanadium trap would increase activity and naphtha yield in a commercial FCC-unit. Octane barrels would also increase; however, the octane numbers could be reduced, dependent on the unit operation. If the FCC-unit is octane constrained, this could be a problem.