Isomerization of n-octane on NiW／HSAPO-11 Catalyst

1. Introduction Hydrorefining of n-paraffins over solid acidcatalyst is used to produce high octane gasolineblending components (Cusher, et al., 1986), toincrease the low temperature performance of diesel(Miller, 1994) and to obtain high viscosity inde…

Isomerization of n-octane on NiW/HSAPO-11 Catalyst

The catalyst NiW/HSAPO-11 was prepared by impregnating Ni and W onto HSAPO-11 zeolite with two different methods. The isomerization and aromatization properties were investigated with an microreactor using n-octane as a feedstock. NiW/HSAPO-11 shows a high hydroconversion activity of n-octane, and the optimum operating parameters for the catalyst to produce high octane number products were: 400℃, 2.0MPa, VH2:Vn-octane= 400:1, liquid hourly space velocity LHSV=i.0h-1. Under the optimum reaction condition, the conversion efficiency, Cs+liquid productselectivity, isomerization and aromatization product selectivity were 69.80%, 56.95%, 79.73% and 1.29% respectively.The catalyst (S1) impregnated with Ni and W after the HSAPO-11 zeolite was combined with Al2O3 matrix, performed better than the catalyst (S2) impregnated with Ni and W before combining with the Al2O3 matrix.