Novel three-component zeolite capsule catalyst for direct synthesis of isoparaffin

A zeolite capsule catalyst with core (Co/Al₂O₃)/shell(H-beta membrane) structure was prepared and used for isoparaffin direct synthesis. Based on this catalyst, a new Pd painted zeolite capsule catalyst with three-component core (Co/Al₂O₃)/shell(H-beta membrane)/paint (Pd) structure was developed. For the isoparaffin synthesis, Co/Al₂O₃ showed the lowest C₁/C₁ ratio, but with the highest activity. The selectivity of olefins increased with the production of isoparaffin undergoing the cracking reaction. Based on the hydrogenation of olefins, by the Pd loaded on the zeolite shell, the three-component zeolite capsule catalyst showed the highest isoparaffin selectivity.