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− Phosphorus was incorporated into Co/Al 2 O 3 catalyst for FTS by impregnating an acidic precursor, phosphoric acid, in γ-Al 2 O 3 support to improve the mechanical strength, the hydrothermal stability of the catalyst particle, and the catalytic performance as well. Surface characterization techniques such as FT-IR revealed that AlPO 4 phase was generated on the surface of the P-modified catalyst. The addition of phosphorus was found to alleviate the interaction between cobalt and alumina surface, and to increase reducibility of catalyst. The catalytic activity such as C 5+ productivity and turnover frequency (TOF) was calculated to evaluate catalytic performance. The influence of calcination temperature of the Al 2 O 3 containing 2 wt.% P on the catalytic performance was also investigated. Through hydrothermal stability test and XRD analysis, the P-modified catalyst had strong resistant to the pressurized and hot H 2 O. The mechanical strength of the P-modified catalyst was also examined through an in-house fluidized-bed vessel, and it was found that the catalyst fragmentation could be successfully suppressed with P. Taken as a whole, the best performance was shown to be at 1~2 wt.% P in alumina and at the calcination temperature of 500 C.

Phosphorus Modified Co/Al2O3Fischer-Tropsch Catalyst for a Slurry Phase CSTR with Enhanced Hydrothermal and Mechanical Stability

Phosphorus Modified Co/Al₂O₃Fischer-Tropsch Catalyst for a Slurry Phase CSTR with Enhanced Hydrothermal and Mechanical Stability