Fischer-Tropsch synthesis catalyst and application thereof
A Fischer-Tropsch synthesis and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of methane selectivity decline and increase Co metal surface active sites Density and other issues
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[0027] When the catalyst also contains one or more selected from Li, Na, K, Mg, Ca, Sr, Cu, Mo, Ta, W, Zr, Ti, REO, Re, Hf, Ce, Mn, V When an auxiliary component is used, the preparation method of the catalyst further includes the step of introducing the auxiliary component into the catalyst. According to the usual method for preparing the Fischer-Tropsch synthesis catalyst, the auxiliary component may be introduced during the preparation of the carrier, or before, after or at the same time when the metal component is supported. For example, during extrusion molding, the auxiliary component or the compound containing the auxiliary component is directly mixed with the carrier and / or precursor to be shaped, and then extruded. Or it is introduced by the method of impregnating the solution containing the auxiliary component compound before, after or at the same time supporting the metal component.
[0028] In a specific embodiment, the support is an alumina modified by a metal compo...
Embodiment 1
[0037] (1) Catalyst preparation
[0038] Weigh 20 grams of γ-Al 2 O 3 Powder (sasol alumina, average particle size is 40-80 microns), dissolve 24.6 g of cobalt nitrate hexahydrate in 10 ml of deionized water to make an impregnation solution, impregnate the aforementioned alumina carrier with the solution, and let it stand for 2 hours , Dried in an oven at 120°C for 4 hours, then placed it in a tube furnace and calcined at 450°C for 4 hours to obtain sample A1.
[0039] HAuCl 4 ·4H 2 O (the weight percentage of gold is greater than 47.8%) 0.02 g, 0.17 g of urea is dissolved in water to prepare 250 ml of aqueous solution (the molar ratio of urea to gold atoms is 60:1), mix 20 g of A1 with the solution, and heat up To 80°C, immerse and react for 4 hours under stirring. After that, the slurry was filtered and washed with deionized water until the filtrate was free of chloride ions (the filtrate was titrated with a 0.1 mol / L silver nitrate solution, no turbidity, the same below), the f...
Embodiment 2
[0043] (1) Catalyst preparation
[0044] Weigh 20 grams of γ-Al 2 O 3 Powder (sasol alumina, average particle size is 40-80 microns), then weigh 24.6g cobalt nitrate hexahydrate and dissolve in 10ml deionized water to make an impregnation solution, impregnate the aforementioned alumina carrier with this solution, and let it stand for 2h Afterwards, it was dried in an oven at 120°C for 4 hours, and then placed in a tube furnace and calcined at 450°C for 4 hours to obtain sample A1.
[0045] HAuCl 4 ·4H 2 O (the weight percentage of gold is greater than 47.8%) 0.04 g, 0.70 g of urea is dissolved in water to prepare 250 ml of aqueous solution (the molar ratio of urea to gold atoms is 120:1), mix 20 g of A1 with the solution, and heat up To 80°C, immerse and react for 4 hours under stirring. After that, the slurry was filtered and washed with deionized water until no chloride ions were detected in the filtrate. After the filter cake was dried in an oven at 120°C for 3 hours, it was ca...
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