A kind of Fischer-Tropsch synthesis catalyst and its application
A technology of Fischer-Tropsch synthesis and catalyst, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc. It can solve the problems of harsh temperature control and complicated preparation process, and achieve High wear resistance, good selectivity and high activity
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Embodiment 1
[0032] (1) carrier preparation
[0033] Add 300g of pure water and 100g of γ-alumina (average particle size 77μm, specific surface area 175m 2 / g, pore volume 0.72mL / g), control the stirring rate 400r / min, then add an appropriate amount of ammonia water until the pH value is 10.8, and finally add 18.1g tetraethyl orthosilicate, react at room temperature for 2 hours, and vacuum the reaction system Filter, dry at 120°C for 2 hours, and bake at 600°C for 4 hours to obtain 2.3% silicon-modified alumina.
[0034] (2) Catalyst preparation
[0035] 138 g of cobalt nitrate hexahydrate and 4.10 g of zirconyl nitrate dihydrate were dissolved in 50 mL of deionized water, and 9.48 g of ruthenium nitrosyl nitrate solution containing 1.5% by weight of Ru were added to obtain an impregnation solution. Disperse 100g of the above-mentioned carrier into the above-mentioned impregnation solution, stir at room temperature for 1 hour, and then rotary evaporate to obtain a dried catalyst sample. ...
Embodiment 2
[0052] (1) carrier preparation
[0053] Add 1008g of pure water, 672g of absolute ethanol and 720g of alumina carrier (average particle size 139μm, specific surface area 60m 2 / g, pore volume 0.25mL / g), control the stirring rate to 300r / min, then add an appropriate amount of ammonia water until the pH value is 13.5, and finally add 45g of tetraethyl orthosilicate, react at 60°C for 4 hours, vacuum filter, Dry at 200°C for 12 hours to obtain silicon-modified alumina with a silicon content of 0.8%.
[0054] (2) Catalyst preparation
[0055] Dissolve 423.5 g of cobalt nitrate hexahydrate and 13.10 g of zirconyl oxynitrate dihydrate in 250 mL of deionized water, and add 1.2 g of platinum dichlorodiammine solution containing 1.05 wt % of Pt to obtain an impregnation solution. Dried catalyst samples were obtained by impregnating into 100g of the above-mentioned carrier in four times and rotary evaporation. Each sample was dried at 180°C for 4 hours to obtain catalyst C2. The formu...
Embodiment 3
[0057] Compared with Example 2, the only difference is that the amount of ammonia added is controlled so that the pH of the system is 11, and the obtained catalyst is designated as C3.
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