Preparation method for cobalt-based Fischer-Tropsch synthesis catalyst
A technology for catalyst and Tropsch synthesis, which is applied in the field of preparation of cobalt-based Fischer-Tropsch synthesis catalysts, can solve problems such as unsuitable for large-scale use, unreachable catalyst stability and selectivity, and high cost of noble metal Pt, so as to improve industrial promotion and use, Effects of catalyst cost reduction and low methane selectivity
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example 1
[0018] Weigh commercially available silica gel (pore volume is 1.06ml / g, specific surface area is 386.81m 2 / g, the following examples all use the silica gel) 30g, distilled water is added dropwise to initial moistening, the volume of consumed water is 48ml, 48ml concentration is 20% pyridine solution, add in silica gel at 50 ℃, process 10 hours. Dry at 60°C for 24 hours, then bake at 280°C for 15 hours. Based on the final catalyst zirconium content of 1wt%, weigh 1.41g of zirconium nitrate trihydrate, add distilled water to 48g, wait for complete dissolution, add the above-mentioned modified carrier silica gel for impregnation, aging for 3 hours, and dry at 50°C for 24 hours. °C for 10 hours. According to the final catalyst cobalt content 5wt%, Ni content 0.5wt%, weigh 7.41g of cobalt nitrate hexahydrate and nickel nitrate hexahydrate 0.74g, add distilled water to 48g, wait for complete dissolution, add in the above-mentioned sample impregnated with zirconium, aging 3 hours...
example 2
[0021] Weigh 30g of commercially available silica gel, add distilled water dropwise until initial moistening, the volume of consumed water is 48ml, add 48ml of 15% diethanolamine solution into the silica gel at 80°C, and stir. Treat for 30 hours and dry at 90°C for 16 hours. Based on the final catalyst zirconium content of 3wt%, weigh 4.23g of zirconium nitrate trihydrate, add distilled water to 48g, wait for complete dissolution, add the above-mentioned modified carrier silica gel for impregnation, aging for 3 hours, and dry at 150°C for 8 hours. °C for 2 hours. Based on the final catalyst cobalt content of 35wt% and Ni content of 1.5%, the active metal and auxiliary agent Ni are impregnated in two steps. The first step is to weigh 25.94 g of cobalt nitrate hexahydrate and 1.11 g of nickel nitrate hexahydrate, add distilled water to 48 g, wait until completely dissolved 1, add to the above sample impregnated with zirconium, age for 3 hours, dry at 150°C for 8 hours, and dry ...
example 3
[0023]Weigh 30g of commercially available silica gel, add distilled water dropwise until initial moistening, the volume of consumed water is 48ml, add 48ml of 5% ethanolamine solution to the silica gel at 95°C, stir for 100 hours, and dry at 100°C for 8 hours. Based on the final catalyst zirconium content of 2wt%, weigh 2.82g of zirconium nitrate trihydrate, add distilled water to 48g, wait for complete dissolution, add the above-mentioned modified carrier silica gel for impregnation, aging for 3 hours, and dry at 80°C for 12 hours. °C for 4 hours. According to the final catalyst cobalt content 20wt%, Ni content 1%, weigh 29.64g of cobalt nitrate hexahydrate and nickel nitrate hexahydrate 1.48g, add distilled water to 48g, wait for complete dissolution, add in the above-mentioned sample after impregnating zirconium, aging 3 hours, dried at 80°C for 12 hours, and calcined at 350°C for 4 hours. The resulting catalyst is designated CFT-3. The experimental conditions for catalys...
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