Synthesis gas conversion catalyst and its preparation method and application
A synthesis gas conversion and catalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of methane selectivity improvement, activity stability reduction, and complex preparation process, etc., to achieve improved Dispersion and reduction, reduced concentration of hydroxyl groups, simple preparation effects
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example 1
[0019] Weigh commercially available silica gel (the pore volume is 1.06ml / g, the specific surface area is 386.81m 2 / g, this silica gel per 10 grams of distilled water is added dropwise to the volume of water consumed when the initial moistening is 16ml, the following examples all use this silica gel) 30g, the pH value is adjusted to 5.5, and the mass concentration of copper ions is 2% copper nitrate The solution is excessively impregnated on the silica gel carrier, the impregnation temperature is 75°C, and the impregnation time is 50h. After impregnation, excess copper nitrate solution is filtered off, dried at 100°C for 20h, and roasted at 400°C for 8h. Based on the final catalyst cobalt content of 5wt%, weigh cobalt nitrate and dissolve it in 48ml of water, add it to the silica gel carrier treated with copper nitrate solution, impregnate it, age for 3 hours, dry at 80°C for 8 hours, and bake at 350°C for 4 hours. The resulting catalyst was designated as C-1.
[0020] Catal...
example 2
[0022] Weigh 30 g of commercially available silica gel, adjust the pH value to 5, and use a copper nitrate solution with a mass concentration of copper ions of 1% to excessively impregnate the silica gel carrier. The impregnation temperature is 60 ° C, and the impregnation time is 10 hours. Remove excess copper nitrate solution, dry at 50°C for 36h, and bake at 300°C for 2h. Based on the final catalyst cobalt content of 15wt%, weigh cobalt nitrate and dissolve it in 48ml of water, add it to the silica gel carrier treated with copper nitrate solution, impregnate it, age for 3 hours, dry at 80°C for 8 hours, and bake at 350°C for 4 hours. The resulting catalyst is designated C-2. The experimental conditions for catalyst activity evaluation are the same as in Example 1. The results of the Fischer-Tropsch synthesis reaction over the C-2 catalyst are shown in Table 1.
example 3
[0024] Weigh 30 g of commercially available silica gel, adjust the pH value to 6, and use a copper sulfate solution with a mass concentration of copper ions of 3% to excessively impregnate the silica gel carrier. The impregnation temperature is 80 ° C, and the impregnation time is 100 hours. Remove excess copper sulfate solution, dry at 150°C for 2h, and bake at 500°C for 15h. Based on the final catalyst cobalt content of 15wt%, weigh cobalt nitrate and dissolve it in 48ml of water, add it to the silica gel carrier treated with copper nitrate solution, impregnate it, age for 3 hours, dry at 80°C for 8 hours, and bake at 350°C for 4 hours. The resulting catalyst was designated C-3. The experimental conditions for catalyst activity evaluation are the same as in Example 1. Table 1 shows the results of the Fischer-Tropsch synthesis reaction over the C-3 catalyst.
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