Iron nickel Fischer-Tropsch synthetic catalyst and preparation thereof

A technology for catalyst and Tropsch synthesis, applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, physical/chemical process catalysts, etc., can solve the problems of high temperature and high olefins in Fischer-Tropsch synthesis, and achieve good activity and reasonable ratio Effect of surface area and pore structure, high product conversion rate

Active Publication Date: 2010-10-20
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent CN 1651138 of Shanxi Institute of Coal Chemical Industry, Chinese Academy of Sciences discloses a nickel-containing Fischer-Tropsch synthesis catalyst. Although the catalyst contains nickel, it is an iron-manganese Fischer-Tropsch synthesis catalyst, and the catalyst is characterized by high olefin and low Selectivity of heavy hydrocarbons, in the examples given in its patent, the Fischer-Tropsch synthesis temperature is relatively high, 230-280°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] With 76 kilograms of ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 0) and 0.52 kilograms of nickel nitrate hexahydrate, copper nitrate trihydrate of 3.2 kilograms are dissolved in deionized water, are mixed with 700 liters of solutions. Dissolve 45 kg of anhydrous sodium carbonate with deionized water to make 150 liters of solution.

[0030] Preheat the mixed solution of iron, nickel and copper metal salts and sodium carbonate solution to 90°C, co-precipitate into the reaction kettle, adjust the pH value of the precipitation to 8, filter after the precipitation, and wash to obtain the co-precipitation filter cake. Add 100 liters of deionized water to make a slurry in the co-precipitation filter cake, the solid content of the slurry is about 10%, add SiO 2 : K 2 O=0.3, SiO 210.5 kg of potassium silicate water glass solution with a weight concentration of 10%, mix evenly, the pH value of the pulping liquid is 5, impregnate at 85°C for 10 minutes, filter the catalyst i...

Embodiment 2

[0032] Obtain coprecipitation filter cake according to embodiment 1 step. Add 100 liters of deionized water to the co-precipitation filter cake for beating, the solid content of the slurry is about 10%, add SiO 2 : K 2 O=0.7, SiO 2 10.5 kg of potassium silicate water glass solution with a weight concentration of 10%, mix well, adjust the pH value of the slurry to 5, impregnate at 85°C for 10 minutes, filter the catalyst impregnation solution to obtain impregnation filter cake, add 145 liters of deionized water beating, the solid content of the slurry is about 10%, the obtained slurry is spray-dried under the control of the inlet hot air temperature of 320°C and the outlet hot air of 180°C, and roasted at 360°C for 6 hours to obtain about 15 kg of catalyst. Name it B.

Embodiment 3

[0034] 76 kilograms of ferric nitrate nonahydrate, 2.6 kilograms of nickel nitrate hexahydrate, and 0.8 kilograms of copper nitrate trihydrate were dissolved in deionized water to prepare 400 liters of solution. Dissolve 45 kg of anhydrous sodium carbonate with deionized water to prepare 230 liters of solution.

[0035] Preheat the iron, nickel, copper metal salt mixed solution and sodium carbonate solution to 80°C, co-precipitate into the reaction kettle, adjust the pH value of the precipitation to 7, filter and wash after the precipitation to obtain the co-precipitation filter cake. Add 100 liters of deionized water to make a slurry in the co-precipitation filter cake, the solid content of the slurry is about 10%, add SiO 2 : K 2 O=1.0, SiO 2 10.5 kg of potassium silicate water glass solution with a weight concentration of 15%, mix well, adjust the pH value of the slurry to 7, impregnate at 70°C for 25 minutes, filter the catalyst impregnation solution to obtain impregnati...

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Abstract

The invention discloses a Fischer-Tropsch synthesis iron-based catalyst containing nickel, wherein Fe:Ni:K:Cu:SiO2 equals to 100:0.01-40:0.1-15:0.1-15:2-50. Solution containing metals of iron, nickel and copper and soda solution are carried out coprecipitation, which is adopted by the invention, after precipitation paste and solution containing silicon are carried out size mixing, serum acquired is transferred into a spray dryer for drying and molding, and then baking is carried out to obtain the catalyst. The catalyst of the invention is suitable for low temperature Fischer-Tropsch synthesisreaction and has the advantages of good activity and selectivity, high product conversion rate, mild reaction conditions, etc.; in addition, the preparation process of the invention is simple and thecatalyst prepared has better granularity and intensity, which is suitable for a process of slurry-bed Fischer-Tropsch reaction.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthesis iron-based catalyst, in particular to a nickel-containing Fischer-Tropsch synthesis iron-based catalyst. Background technique [0002] In 1923, the Kaiser Wilhekm Coal Research Institute in Germany used alkali-added iron scraps as a catalyst in F. Fischer and H. Tropsch. Under the conditions of temperature 400-450 ° C and pressure 10-15 Mpa, CO and H 2 The reaction produces a mixed liquid of hydrocarbons and oxygenates. From 1925 to 1926, the two men used iron or cobalt catalysts to obtain hydrocarbon products that hardly contained oxygen-containing compounds at normal pressure and 250-300°C. Since then, the synthesis gas (CO and H 2 ) The method of synthesizing hydrocarbon or alcohol fuel under catalysis is called Fischer-Tropsch synthesis. [0003] There are two types of catalysts for Fischer-Tropsch synthesis in industry, namely iron-based catalysts and cobalt-based catalysts, and the research ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78C07C1/04C10G2/00
Inventor 林泉崔民利吕德义
Owner CHNA ENERGY INVESTMENT CORP LTD
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