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High wear resistance slurry bed Fischer-Tropsch synthesis iron-based catalyst, preparation method and application

An iron-based catalyst, a Fischer-Tropsch synthesis technology, which is used in the preparation of liquid hydrocarbon mixtures, chemical instruments and methods, catalysts for physical/chemical processes, etc. Synthetic reactivity, easy for large-scale industrial production, and the effect of enhancing wear-resistant mechanical strength

Active Publication Date: 2021-06-15
YANKUANG ENERGY R&D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent CN101811047A discloses an iron-based catalyst for Fischer-Tropsch synthesis, the catalyst includes oxides of iron, reduction aid IB group metal Cu and / or Ag, electron aid IA group metal Li, Na, K or Rn, plus Hydrogen additive Group VIII noble metal Ru, Rh, Pd or Pt, and structural additive SiO 2 , the catalyst was used in low-temperature Fischer-Tropsch synthesis to produce heavy hydrocarbons, but no catalyst stability and lifetime data were reported

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  • High wear resistance slurry bed Fischer-Tropsch synthesis iron-based catalyst, preparation method and application
  • High wear resistance slurry bed Fischer-Tropsch synthesis iron-based catalyst, preparation method and application
  • High wear resistance slurry bed Fischer-Tropsch synthesis iron-based catalyst, preparation method and application

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Experimental program
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Embodiment 1

[0040] 10kg iron powder and 566g copper powder are dissolved in 90L56wt% nitric acid solution, dilute to obtain metal solution, wherein Fe content is 60g / L, and Cu content is 3.3g / L; 2 CO 3Add the aqueous solution into the reaction kettle and heat it to 65°C; at the same time, heat the above metal solution to 65°C and add it into the reaction kettle under rapid stirring to form a slurry. The reaction time is 30 minutes, and the pH value of the precipitated slurry is 7.5. Filter, Washing gave a co-precipitate with a solid content of 22.8%. Add 50kg of co-precipitate and deionized water to make a slurry again, the solid content of the slurry is about 15%, add 6.0kg of potassium silicate water glass solution (SiO 2 : 22.5wt%, K 2 O: 12.5wt%), mix well, use nitric acid to adjust the slurry pH to 7.15, keep at 85°C for 30 minutes, filter to obtain a filter cake with a solid content of 28.2%. Add the filter cake to 13.2 kg of 1.9 wt% AgNO 3 In the aqueous solution, the slurry is...

Embodiment 2

[0042] 10kg iron powder and 400g copper powder are dissolved in 85L60wt% nitric acid solution, dilute to obtain metal solution, wherein Fe content is 40g / L, Cu content is 1.6g / L; 10.5wt%Na 2 CO 3 Add the aqueous solution into the reaction kettle and heat it to 85°C; at the same time, heat the above metal solution to 85°C and add it into the reaction kettle under rapid stirring to form a precipitation slurry. The reaction time is 15 minutes, and the pH value of the precipitation slurry is 6.0. Filter , washing to obtain a co-precipitate with a solid content of 26%. 40kg coprecipitate, add deionized water to form a slurry, the slurry solid content is about 20%, add 3.0kg potassium silicate water glass solution (SiO 2 : 26.5wt%, K 2 O: 13.5wt%), mix evenly, use nitric acid to adjust the slurry pH to 6.9, keep it at 65°C for 45 minutes, then add 3.0kg of 15wt% AgNO 3 (0.5kg nanometer tungsten carbide is dispersed in it in advance), add 2.7kg of 30wt% alkaline silica gel, keep t...

Embodiment 3

[0044] 15kg iron powder and 900g copper powder are dissolved in 110L45wt% nitric acid solution, dilute to obtain metal solution, wherein Fe content is 50g / L, Cu content is 3.0g / L; 9.5wt%Na 2 CO 3 Add the aqueous solution into the reaction kettle and heat it to 50°C; at the same time, heat the above metal solution to 50°C and add it into the reaction kettle under rapid stirring to form a precipitation slurry. The precipitation reaction time is 60 minutes, and the pH value of the slurry is 8.0. Filter 1. Washing to obtain a precipitate co-precipitate with a solid content of 24.5%. 80kg of precipitated co-precipitate is added deionized water to make a slurry again, and the solid content of the slurry is about 14%, and 6.5kg of potassium silicate water glass solution (SiO 2 : 27.0wt%, K 2 O: 13.0wt%), mix evenly, use nitric acid to adjust the pH value of the slurry to 7.4, keep it at 50°C for 20 minutes, and filter to obtain a filter cake with a solid content of 30.1%. Add the ...

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Abstract

The invention relates to a highly wear-resistant slurry bed Fischer-Tropsch synthesis iron-based catalyst and its preparation method and application. The weight composition of the catalyst is Fe: M: K: WC: S = 100: 2-10: 1-10: 2-15 : 10‑50, M is Cu and Ag, S is selected from SiO 2 、Al 2 o 3 , ZrO 2 One or more of them, metal iron and copper are dissolved with concentrated nitric acid, added to the precipitant to react, filtered, washed, and then added to the potassium silicate solution after beating with water to adjust the pH value of the slurry, filtered and added to the silver nitrate aqueous solution to form Add nano-tungsten carbide and S glue after the slurry to obtain catalyst slurry; or add water to the co-precipitate to form a slurry, add potassium silicate water glass solution, adjust the pH value of the slurry, add silver nitrate solution, nano-tungsten carbide aqueous suspension solution, S The glue solution is uniformly mixed to obtain a catalyst slurry; the catalyst slurry is spray-dried and calcined to obtain a catalyst with better sphericity. The catalyst of the invention has the advantages of high mechanical strength, good stability of Fischer-Tropsch synthesis reaction, etc., and is especially suitable for long-term operation of large-scale industrial Fischer-Tropsch synthesis devices.

Description

technical field [0001] The invention relates to an iron-based catalyst and its preparation method and application field, in particular to a highly wear-resistant slurry-state Fischer-Tropsch synthesis iron-based catalyst and its preparation method and application. Background technique [0002] The research on Fischer-Tropsch synthesis has a history of nearly a hundred years. In recent years, due to the increase of proven reserves of coal and natural gas and the adjustment of energy industry structure in various countries, Fischer-Tropsch synthesis has become one of the research hotspots in the field of energy substitution at home and abroad. The slurry bed reactor has many advantages such as high production efficiency, good heat and mass transfer performance, uniform reaction temperature distribution, easy operation and control, and convenient transportation and installation. It is currently the development trend and research frontier of Fischer-Tropsch synthesis reactor tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/22C10G2/00
CPCB01J23/002B01J27/22B01J35/1019B01J35/1038B01J35/1042C10G2/332
Inventor 孙启文孙燕张宗森
Owner YANKUANG ENERGY R&D CO LTD
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