Method for preparing low-cost high-activity cobalt-based Fischer-Tropsch synthetic catalyst
A cobalt-based Fischer-Tropsch synthesis technology, which is used in catalyst activation/preparation, preparation of liquid hydrocarbon mixtures, chemical instruments and methods, etc. The problem of high cost, to achieve the effect of improving industrial popularization, low methane selectivity, and simple preparation
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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, and the volume of consumed water is 48ml. The aqueous solution with a sucrose mass concentration of 5% was adjusted to a pH value of 3 with sulfuric acid, and the mass ratio of the silica gel to the mixed solution was 1:4, and the silica gel and the sucrose acidic solution were fully mixed and stirred for 2 hours at a temperature of 60°C. Dry at 60°C for 24 hours, and then bake at 800°C for 10 hours in vacuum or nitrogen atmosphere.
[0019] 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 cata...
example 2
[0022] Weigh commercially available silica gel, add distilled water dropwise until initial moistening, and the volume of consumed water is 48ml. The aqueous solution with a sucrose mass concentration of 15% was adjusted to a pH value of 2 with hydrochloric acid, and the mass ratio of the silica gel to the mixed solution was 1:9, and the silica gel and the sucrose acidic solution were fully mixed and stirred at a temperature of 70° C. for 3.5 hours. Dry at 100°C for 16 hours, then vacuum bake at 900°C for 8 hours.
[0023]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 w...
example 3
[0025] Weigh commercially available silica gel, add distilled water dropwise until initial moistening, and the volume of consumed water is 48ml. The aqueous solution with a sucrose mass concentration of 20% was adjusted to a pH value of 1 with sulfuric acid, and the mass ratio of the silica gel to the mixed solution was 1:12, and the silica gel and the sucrose acidic solution were fully mixed and stirred for 5 hours at a temperature of 80°C. Dry at 120°C for 8 hours, then vacuum bake at 1000°C for 4 hours.
[0026] 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 48...
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