COBALT-BASED FISCHER-TROPSCH SYNTHESIS CATALYST COATED WITH MESOPOROUS MATERIALS AND PREPARATION METHOD THEREFOR

摘要

A cobalt-based Fischer-Tropsch synthesis catalyst coated with mesoporous materials and preparation method therefor are disclosed. The catalyst comprises a silica carrier surface-loaded with an active component of cobalt and a selective promoter of zirconium; the outside of the active component of cobalt and the selective promoter of zirconium is coated with a mesoporous material shell layer. The preparation method comprises preparing silica carrier loaded with zirconium, preparing an initial cobalt-based Fischer-Tropsch synthesis catalyst on the silica carrier base, formulating a precursor solution of mesoporous materials, then dipping, crystallizing, washing, drying and calcining to obtain the cobalt-based Fischer-Tropsch synthesis catalyst coated with mesoporous materials. The active component is coated and protected by the mesoporous material shell layer, the thickness of the shell layer is controllable, the catalyst has long service life, high reactivity and good stability. The pore structure of mesoporous materials provides a channel for diffusing CO and H2, the selectivity of C5 + is high and the selectivity of methane is low. The catalyst is specially applicable to slurry bubble column reactors or continuously stirred tank reactors.