ZSM-5 seed-grafted SBA-15 as a high performance support for cobalt Fischer–Tropsch synthesis catalysts

A novel composite material ZSM-5/SBA-15 (SZM) was synthesized by grafting ZSM-5 zeolite seeds into mesoporous SBA-15 silica. This composite was used as a Co (20 wt%) catalyst support for Fischer–Tropsch synthesis (FTS). The catalytic activity and product selectivity were significantly influenced by the content of ZSM-5 seeds. The 20Co/SZM-1 catalyst with a lower content of ZSM-5 seeds showed the highest CO conversion (64.7%) as well as the highest C5+ selectivity (83.6%). The 20Co/SZM-2 catalyst with a higher content of ZSM-5 seeds exhibited a better bifunctional catalytic performance at a higher reaction temperature (260 °C).