Method for preparing high-activity cobalt-based Fischer-Tropsch synthetic catalyst
A cobalt-based catalyst technology, applied in the direction of catalyst activation/preparation, preparation of liquid hydrocarbon mixtures, chemical instruments and methods, etc., can solve the problems of complex preparation process, simplify the preparation process, shorten the time, and reduce production costs Effect
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example 1
[0022] 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, and the volume of consumed water is 48ml. Based on the final catalyst zirconium content of 1 wt%, weigh 1.41g of zirconium nitrate trihydrate, add distilled water to 48g, wait for complete dissolution, add carrier silica gel to impregnate, age for 3 hours, and bake at 600°C for 10 hours. According to the final catalyst cobalt content of 5wt%, weigh 7.41g of cobalt nitrate hexahydrate, add distilled water to 48g, wait until it is completely dissolved, add it to the sample impregnated with zirconium, age for 3 hours, dry at 50°C for 24 hours, and bake at 280°C 10 hours. The resulting catalyst was designated CFT-1.
[0023] Catalyst evaluation test In a high-pressure continuous stirred tank reactor, paraffin was used as a solvent, and pure hydrogen was reduced ...
example 2
[0025] Weigh 30g of commercially available silica gel, add distilled water dropwise until initial moistening, and the volume of consumed water is 48ml. Based on the final catalyst zirconium content of 3wt%, weigh 4.23g of zirconium nitrate trihydrate, add distilled water to 48g, wait until completely dissolved, add carrier silica gel to impregnate, age for 3 hours, and bake at 900°C for 2 hours. According to the final catalyst cobalt content of 35wt%, weigh 25.94 g of cobalt nitrate hexahydrate, add distilled water to 48g, wait for complete dissolution and add to the sample impregnated with zirconium, age for 3 hours, dry at 150°C for 8 hours, and roast at 600°C for 2 hours , The resulting catalyst is denoted as CFT-2. The experimental conditions for catalyst activity evaluation are the same as in Example 1. The results of Fischer-Tropsch synthesis reaction over CFT-2 catalyst are shown in Table 1.
example 3
[0027]Weigh 30g of commercially available silica gel, add distilled water dropwise until initial moistening, and the volume of consumed water is 48ml. 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 carrier silica gel to impregnate, age for 3 hours, and bake at 800°C for 4 hours. According to the final catalyst cobalt content of 20wt%, weigh 29.64g of cobalt nitrate hexahydrate, add distilled water to 48g, wait until it is completely dissolved, add it to the sample impregnated with zirconium, age for 3 hours, dry at 80°C for 12 hours, and bake at 350°C 4 hours. The resulting catalyst is designated CFT-3. The experimental conditions for catalyst activity evaluation are the same as in Example 1. The results of the Fischer-Tropsch synthesis reaction over the CFT-3 catalyst are shown in Table 1.
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