Synthesis of Low-Pour-Point Diesel Fuel in the Presence of a Composite Cobalt-Containing Catalyst

Abstract

Production of synthetic diesel fuel by the Fischer–Tropsch (FT) method in the presence of a composite catalyst prepared by mechanically mixing 35 wt % Co/SiO₂, 30 wt % HZSM-5, and 30 wt % Al₂O₃ has been studied. The catalyst has been characterized by the H₂ TPR, H₂ TPD, NH₃ TPD, XRD, SEM, and TEM methods. Catalytic properties have been studied in a fixed-bed flow reactor at 2 MPa and a GHSV of 1000 h^–1 in the temperature range of 230–250°C. The highest efficiency and C₅₊ HC selectivity values of 130 kg/(m³ h) and 72.5%, respectively, are achieved at 250°C. The low-temperature properties of the synthetic diesel fuel meet the requirements for winter diesel.