Preparation method for cobalt-based Fischer-Tropsch synthesis catalyst
A Tropschite synthesis and catalyst technology, which is applied in the field of preparation of cobalt-based Fischer-Tropsch synthesis catalysts, can solve the problems of unsuitability for mass use, high cost of precious metal Pt, unattainable catalyst stability and selectivity, etc., so as to improve industrial popularization and use. , the effect of reducing catalyst cost 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 this silica gel) 30g, distilled water was added dropwise to the beginning of moistening, the volume of water consumed was 48ml, and 48ml of a 20% pyridine solution was added to the silica gel at 50°C, and treated for 10 hours. It was dried at 60°C for 24 hours and then calcined at 280°C for 15 hours. According to the final catalyst zirconium content of 1 wt%, weigh 1.41 g of zirconium nitrate trihydrate, add distilled water to 48 g, and after it is completely dissolved, add it into the above modified carrier silica gel for immersion, age for 3 hours, dry at 50°C for 24 hours, and dry at 280°C for 24 hours. Bake at ℃ for 10 hours. According to the final catalyst cobalt content of 5wt% and Ni content of 0.5wt%, weigh 7.41 g of cobalt nitrate hexahydrate and 0.74 g of nickel nitrate hexahydrate, add distilled water to 48 g, wait for compl...
example 2
[0021] 30 g of commercially available silica gel was weighed, distilled water was added dropwise until it was initially moistened, the volume of water consumed was 48 ml, and 48 ml of a 15% diethanolamine solution was added to the silica gel at 80° C. and stirred. Treated for 30 hours and dried at 90°C for 16 hours. According to the final catalyst zirconium content of 3 wt%, weigh 4.23 g of zirconium nitrate trihydrate, add distilled water to 48 g, and after it is completely dissolved, add it into the above modified carrier silica gel for immersion, age for 3 hours, dry at 150°C for 8 hours, and then dry at 600°C for 3 hours. Bake at ℃ for 2 hours. According to the final catalyst cobalt content of 35wt% and Ni content of 1.5%, the active metal and auxiliary 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, and to be completely dissolved 1, add it to the sampl...
example 3
[0023]30 g of commercially available silica gel was weighed, distilled water was added dropwise until it was initially moistened, the volume of water consumed was 48 ml, and 48 ml of a 5% ethanolamine solution was added to the silica gel at 95 ° C, stirred for 100 hours, and dried at 100 ° C for 8 hours. According to the final catalyst zirconium content of 2 wt%, weigh 2.82 g of zirconium nitrate trihydrate, add distilled water to 48 g, and after it is completely dissolved, add it into the above modified carrier silica gel for immersion, age for 3 hours, dry at 80°C for 12 hours, and then dry at 350°C for 12 hours. calcined at ℃ for 4 hours. According to the final catalyst cobalt content of 20wt% and Ni content of 1%, weigh 29.64 g of cobalt nitrate hexahydrate and 1.48 g of nickel nitrate hexahydrate, add distilled water to 48 g, wait for complete dissolution, add to the sample after impregnated zirconium, and age 3 hours, dried at 80°C for 12 hours, and calcined at 350°C for...
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