Biofuel Production by Hydrocracking of Biomass FT Wax over NiMo / Al₂O₃-SiO₂ Catalyst

抄録

Initially, NiMo catalyst supported on amorphous silica-alumina (ASA) was used in the hydrocracking of wax, which was produced from biomass using Fischer Tropsch Synthesis (FTS) from biomass. The hydrocracking process was carried out in a 50 cm³ autoclave at 400 °C and 5 MPa (initial hydrogen pressure). The hydrocracking of hexatriacontane (HTC) over NiMo/ASA catalyst produced diesel oil with 59.5 wt % yield, which is higher than the yield obtained from the hydrocracking of biomass FT wax (36.7 wt %). To achieve the highest reactant activity, the ratio of the promoter Ni to the precursor Mo was maintained at 0.3. To determine how the reactant, such as HTC and FT wax, and the pressure condition affect hydrocracking, we carried out the hydrocracking of blending wax and palm oil (PO) using the semi-batch system. However, HTC was not converted through hydrocracking of a mixture of HTC and PO over NiMo/ASA at 5 MPa and 400 °C. HTC was converted when the promoter was changed from Ni to Pt; this proved that HTC can be converted to diesel and gasoline fraction.