Fischer-Tropsch synthesis iron-based catalyst and preparation method thereof

An iron-based catalyst and Fischer-Tropsch synthesis technology, applied in catalyst activation/preparation, chemical instruments and methods, preparation of liquid hydrocarbon mixtures, etc., can solve the complex manufacturing process of Fischer-Tropsch synthesis iron-based catalysts, etc., to improve the utilization of atoms High efficiency, good stability, and the effect of saving water resources

Active Publication Date: 2012-09-12
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention aims to provide a Fischer-Tropsch synthesis iron-based catalyst and a preparation method thereof, ...

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  • Fischer-Tropsch synthesis iron-based catalyst and preparation method thereof
  • Fischer-Tropsch synthesis iron-based catalyst and preparation method thereof
  • Fischer-Tropsch synthesis iron-based catalyst and preparation method thereof

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preparation example Construction

[0021] According to a typical embodiment of the present invention, the preparation method of the Fischer-Tropsch synthesis iron-based catalyst comprises the following steps: 1) co-precipitating the aqueous solution of iron salt, copper salt, cobalt salt and potassium carbonate aqueous solution to obtain a precipitation slurry; 2 ) After the precipitation slurry is aged, add water and stir evenly, then concentrate to remove part of the water; 3) Add potassium silicate water glass or silica sol to the concentrated precipitation slurry, stir evenly, and let it stand for 0-180 Minutes; 4) Step 3) After the slurry obtained in step 3) was spray-dried and roasted, an iron-based catalyst for Fischer-Tropsch synthesis was obtained, wherein the addition of iron salt, copper salt, cobalt salt, potassium carbonate, potassium silicate water glass and silica sol The amount makes the generated catalyst include the following mass ratio of the component Fe 2 o 3 : Cu: K: SiO 2 :Co=100:(1-10)...

Embodiment 1

[0029] 25kg ferric nitrate nonahydrate, 0.7kg copper nitrate, 4.5kg cobalt nitrate hexahydrate are dissolved in deionized water, are made into 160 liters of solutions (solution mass concentration is 18.88wt%), 12.5kg salt of wormwood is dissolved with deionized water, Make 80 liters of solutions (solution mass concentration is 15.63wt%). Use a pump to flow ferric nitrate, copper nitrate, cobalt nitrate solution and potassium carbonate solution into the reaction kettle, control the temperature in the reaction kettle at 60°C, and control the pH value at 6. After the precipitation is completed, let it stand for aging for 30 minutes. At 60°C, then add 80 liters of deionized water to the slurry (precipitation of Fe in the slurry 2 o 3 Concentration is 1.55%), after concentrating, make Fe in slurry 2 o 3 The concentration is 20wt%. rejoin K 2 O: SiO 2 =1.5 (mass ratio), in potassium silicate water glass, wherein the silicon dioxide concentration is 15%. After mixing evenly, let...

Embodiment 2

[0031] 25kg ferric nitrate nonahydrate, 0.40kg copper nitrate, 2kg cobalt nitrate hexahydrate are dissolved in deionized water, are made into 160 liters of solutions (solution mass concentration is 17.13wt%), 12.5kg salt of wormwood is dissolved with deionized water, prepare Become 100 liters of solutions (solution mass concentration is 12.50wt%). Use a pump to flow ferric nitrate, copper nitrate, cobalt nitrate solution and potassium carbonate solution into the reaction kettle, control the temperature in the reaction kettle at 70°C, and control the pH value at 7. After the precipitation is completed, stir and age for 30 minutes, and the temperature is controlled at 70°C, then add 200 liters of deionized water to the slurry (Fe in the precipitation slurry 2 o 3 Concentration is 1.01%), after concentrating, make Fe in slurry 2 o 3 The concentration is 8wt%. rejoin K 2 O: SiO 2 =1.5 (mass ratio), in the potassium silicate water glass, the silicon dioxide concentration is 2...

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Abstract

The invention discloses a Fischer-Tropsch synthesis iron-based catalyst and a preparation method thereof. The preparation method comprises the following steps: 1, carrying out a coprecipitation reaction on an aqueous solution of an iron salt, a copper salt and a cobalt salt, and an aqueous solution of potash to obtain a precipitation slurry; 2, ageing the precipitation slurry, adding water, uniformly stirring, and concentrating to remove partial water; 3, adding potassium silicate soluble glass or a silicon sol to the concentrated precipitation slurry, uniformly stirring, and allowing the obtained mixture to stand for 0-180min; and 4, carrying out spray drying and roasting on the slurry obtained in step 3 to obtain the Fischer-Tropsch synthesis iron-based catalyst. The preparation method of the Fischer-Tropsch synthesis iron-based catalyst of the invention selects potash as a precipitating agent, and potassium is one component for composing the catalyst, so no impurity ions are introduced, the washing process is omitted, and a large amount of a water resource is saved; the preparation technology is simplified, so interference factors in the catalyst preparation process are reduced; and the atomic utilization rate of raw materials in the catalyst preparation process is improved.

Description

technical field [0001] The invention relates to the field of catalysts and their preparation, in particular to a Fischer-Tropsch synthesis iron-based catalyst and a preparation method thereof. Background technique [0002] In 1923, Germans F.Fischer and H.Tropsch discovered syngas (CO+H 2 ) can synthesize liquid fuels and other chemicals under the action of catalysts, and this process is called Fischer-Tropsch synthesis. The catalysts used for Fischer-Tropsch synthesis include Fe, Co, Ni, Ru and other elements, but only iron-based and cobalt-based catalysts have commercial value. Iron-based catalysts are generally divided into molten iron catalysts and precipitated iron catalysts. Molten iron catalysts are generally used in fixed-bed and fluidized-bed reactors, and limited by conditions in industrial scale-up, it is difficult to achieve million-ton production per year. Precipitated iron catalysts are generally used in slurry bed reactors, and a small part are used in low ...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J35/08B01J37/03C10G2/00
Inventor 朱加清程萌常海谢晶程时富
Owner CHNA ENERGY INVESTMENT CORP LTD
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