Zr—P-modification of the γ-Al2O3 support of cobalt-containing catalysts for the Fischer—Tropsch synthesis

The cobalt-containing catalysts based on alumina modified by zirconium and phosphorus additives were synthesized for the Fischer—Tropsch synthesis. Zirconium cations and phosphate anions are adsorbed onto the surface of the support oxide phase (γ-Al2O3) or incorporated into cobalt-containing oxide. The modification of the support probably prevents the insertion of cobalt cations into γ-Al2O3and favors the formation of larger Co—Al oxide particles with the spinel-like structure. The cobalt systems based on the unmodified support have the highest catalytic activity in the Fischer—Tropsch synthesis at 230 °С (~10 mmolСО (gcat h)–1 at a СО conversion of 20–23%).