Spatial confinement effects of zeolite-based micro-capsule catalyst on tuned Fischer-Tropsch synthesis product distribution

Selectivity control of target product(s) is an enormous challenging in cascade catalytic or tandem system. We demonstrated a facile and fast route to directly construct zeolite-based micro-capsule catalyst with mesoporous nano-silica shell. The as-prepared out-Co/HY@SiO₂ catalyst has achieved an excellent performance of CH₄ and C_5–11 selectivity with 16.4 and 65.0% respectively, as well as low CO₂ selectivity of 2.1%. As expected, the mesoporous shell of micro-capsule catalyst could offer the spatial confinement effects, especial the stay zone of intermedium products for long chain hydrocarbons formation, which were hydrocracked by acidic HY core, consequently tuning the products selectivity.