A kind of coated cobalt-based catalyst for Fischer-Tropsch synthesis and its preparation and application
A cobalt-based catalyst, a technology for the synthesis of Tropon, which is applied in the preparation of liquid hydrocarbon mixtures, molecular sieve catalysts, catalysts for physical/chemical processes, etc., can solve the problem of reducing service life, complex preparation methods of mesoporous zirconia, and affecting the quality of liquid hydrocarbon fuels. and other problems, to achieve the effect of improving stability and service life, easy to control product distribution, and good industrial application prospects
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Embodiment 1
[0042] 1) 5.54g Co(NO 3 ) 2 ·6H 2 O and 0.53g Zr(NO 3 ) 4 ·5H 2 An equal volume of aqueous O solution was impregnated into 10 g of commercially purchased SiO 2 On the carrier, dry at 120°C for 12h, and calcined at 400°C for 6h to obtain the nuclear catalyst precursor. The nuclear catalyst precursor was first refluxed with 0.1mol / L EDTA solution at room temperature for 2 hours, then washed with distilled water, immersed in 50 mL of absolute ethanol, filtered, and dried at 120°C for 12 hours to obtain the treated nuclear catalyst;
[0043] 2) Stir 1g of aluminum isopropoxide, 7.48g of tetraethylammonium hydroxide and 120g of water in a beaker at room temperature for 1 hour, then add 20.4g of tetraethylorthosilicate dropwise, and adjust with 0.1mol / L NaOH solution The pH value is 10. Then add the treated nuclear catalyst into the sol, put them into a stainless steel reaction kettle lined with polytetrafluoroethylene, crystallize for 2 hours, rotate at 1rmp, dry at 120°C fo...
Embodiment 2
[0046] 1) 5.54g Co(NO 3 ) 2 ·6H 2 O and 1.32g Ca(NO 3 ) 2 4H 2 An equal volume of aqueous O solution was impregnated into 10 g of commercially purchased Al 2 o 3 On the carrier, dry at 120°C for 12h, and calcined at 400°C for 6h to obtain the nuclear catalyst precursor. The nuclear catalyst precursor was first refluxed with 0.1mol / L EDTA solution at room temperature for 2 hours, then washed with distilled water, immersed in 50 mL of absolute ethanol, filtered, and dried at 120°C for 12 hours to obtain the treated nuclear catalyst;
[0047] 2) Stir 1g of aluminum isopropoxide, 7.48g of tetraethylammonium hydroxide and 120g of water in a beaker at room temperature for 1 hour, then add 20.4g of tetraethylorthosilicate dropwise, and adjust with 0.1mol / L NaOH solution The pH value is 10. Then add the treated nuclear catalyst into the sol, put them into a stainless steel reaction kettle lined with polytetrafluoroethylene, crystallize for 2 hours, rotate at 1rmp, dry at 120°C...
Embodiment 3
[0050] 1) 5.54g Co(NO 3 ) 2 ·6H 2 O and 0.53g Zr(NO 3 ) 4 ·5H 2 An equal volume of aqueous O solution was impregnated into 10 g of commercially purchased SiO 2On the carrier, dry at 120°C for 12h, and calcined at 400°C for 6h to obtain the nuclear catalyst precursor. The nuclear catalyst precursor was first refluxed with 0.1mol / L EDTA solution at room temperature for 2 hours, then washed with distilled water, immersed in 50 mL of absolute ethanol, filtered, and dried at 120°C for 12 hours to obtain the treated nuclear catalyst;
[0051] 2) Stir 0.8g aluminum sol, 7.48g tetraethylammonium hydroxide and 120g water in a beaker at room temperature for 1h, then add 20.4g tetraethyl orthosilicate dropwise, adjust the pH with 0.1mol / L NaOH solution The value is 10. Then add the treated nuclear catalyst into the sol, put them into a stainless steel reaction kettle lined with polytetrafluoroethylene, crystallize for 2 hours, rotate at 1rmp, dry at 120°C for 24 hours after washin...
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