Cobalt-based Fischer-Tropsch synthesis catalyst and preparation method and application thereof

[0023] Prepare a mixed aqueous solution containing ferric nitrate and barium nitrate, weigh an appropriate amount of citric acid according to the molar ratio of citric acid to the total amount of metal ions in the mixed aqueous solution is 1.2:1, slowly add citric acid to the mixed aqueous solution, and stir while adding. After stirring for 5 hours, the brown solution had been dehydrated and turned into a viscous gel. The gel was taken out and placed in a drying oven at 110° C. to dry overnight. Then take out the dried precursor, place it in a muffle furnace and bake at a constant temperature of 800 °C for 4 hours to obtain a composite metal oxide BaCoO with a cubic crystal shape. 3-y , using the impregnation method on the composite metal oxide BaCoO 3-y Loaded with 10% potassium as an additive by weight, dried at 80°C for 8 hours, and calcined at 350°C for 4 hours to obtain a catalyst, which is designated as C-1. The evaluation results are shown in Table 1.

[0025] Prepare a mixed aqueous solution containing calcium nitrate, manganese nitrate and barium nitrate, weigh an appropriate amount of citric acid according to the molar ratio of citric acid to the total amount of metal ions in the mixed aqueous solution is 2:1, slowly add citric acid to the mixed aqueous solution, and add While stirring. After stirring for 5 hours, the brown solution had been dehydrated and turned into a viscous gel. The gel was taken out and placed in a drying oven at 110° C. to dry overnight. Then take out the dried precursor, put it in a muffle furnace and bake it at a constant temperature of 700 °C for 6 hours to obtain a composite metal oxide CaCo with cubic crystal shape. 0.9 Mo 0.1 o 3-y , using the impregnation method on the composite metal oxide CaCo 0.9 Mo 0.1 o 3-y The catalyst was loaded with 10% potassium by weight, dried at 80°C for 8 hours, and calcined at 350°C for 4 hours to obtain a catalyst, which is recorded as C-2. The evaluation resu

[0027] Prepare a mixed aqueous solution containing barium nitrate, ferric nitrate and manganese nitrate, weigh an appropriate amount of citric acid according to the molar ratio of citric acid to the total amount of metal ions in the mixed aqueous solution is 2:1, slowly add citric acid to the mixed aqueous solution, and add While stirring. After stirring for 5 hours, the brown solution had been dehydrated and turned into a viscous gel. The gel was taken out and placed in a drying oven at 110° C. to dry overnight. Then take out the dried precursor, put it in a muffle furnace and bake it at a constant temperature of 700 °C for 6 hours to obtain a composite metal oxide BaCo with a cubic crystal shape. 0.9 Mo 0.1 o 3-y , using the impregnation method on the composite metal oxide BaCo 0.9 Mo 0.1 o 3-y The catalyst was loaded with 10% potassium by weight, dried at 80°C for 8 hours, and calcined at 350°C for 4 hours to obtain a catalyst, which was recorded as C-3. The evaluation re