Long-term application study of CNFT-1 catalyst for Fischer-Tropsch synthesis

CNFT-1 catalyst,an independently developed iron based Fischer-Tropsch synthesis catalyst,was evaluated in a 100 t / a pilot unit for 2000 h long-term continuous test under commercial Fischer-Tropsch synthesis conditions. The type and height of the employed reactor are DN200 and 28 m. The 100 t / a pilot unit includes seven systems, which are catalyst activation system,Fischer-Tropsch synthesis reaction system,heat removal system,catalyst online re- placement system, wax filtration system, product separation system, gas circulation and tail gas measuring system. CNFT-1 catalyst was activated under 250-270 ℃ and 2. 5-3. 0 MPa for 24 h. The Fischer-Tropsch synthesis was con- ducted under 260-270 ℃ and 3. 0 MPa,with 15 kg loaded catalyst. The catalyst evaluation results showed that the CNFT-1 catalyst remained stable after 5-7 days catalyst replacement period and 13% replacement rate mass fraction each time. During the long-term performance evaluation,CO conversion,CO2 selectivity and CH4 selectivity were 95% -96% ,