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High-efficiency wear-resistant slurry bed Fischer-Tropsch synthesis iron-based catalyst and its preparation method and application

An iron-based catalyst and Fischer-Tropsch synthesis technology, applied in the preparation of liquid hydrocarbon mixtures, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the requirements that the liquid level and pressure of the reactor cannot be kept normal, and the anti-wear performance of the catalyst High, affecting the filtering effect of the filter, etc., to achieve high Fischer-Tropsch synthesis reactivity, easy large-scale industrial production, and improve the effect of acidity and alkalinity

Active Publication Date: 2021-07-20
YANKUANG ENERGY R&D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the anti-wear performance of the catalyst applied in the slurry bed reactor is high. During the reaction process, the catalyst particles are constantly subjected to collisions from the gas phase, liquid phase, between particles and between particles and reactor internals. In addition, the catalyst It is also undergoing complex phase changes in the process of reduction and reaction, which will lead to the pulverization of the catalyst, and the pulverization of the catalyst will affect the filtering effect of the filter, and seriously cause the liquid level and pressure in the reactor to be unable to maintain normal, thus affecting the stable operation of the system

Method used

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  • High-efficiency wear-resistant slurry bed Fischer-Tropsch synthesis iron-based catalyst and its preparation method and application

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Effect test

Embodiment 1

[0032] Dissolve 5kg iron powder and 283g copper powder in 45L 55wt% nitric acid solution, and dilute to obtain a metal solution, wherein the Fe content is 60g / L, and the Cu content is 3.3g / L; 0.8mol / LNa 2 CO 3 The aqueous solution was added to the reaction kettle and heated to 65°C; at the same time, the above-mentioned metal solution was also heated to 65°C, added to the reaction kettle under rapid stirring, the reaction time was 30 minutes, the pH value of the slurry was 7.5, and the coprecipitation was obtained by filtration and washing. Filter cake; Coprecipitation filter cake is added deionized water to beat again, add the potassium silicate water glass solution of 3.0kg (SiO 2 : 22.5wt%, K 2 O: 12.5 wt %), mix evenly, adjust the pH value of the slurry with nitric acid to 7.15, keep at 85° C. for 30 minutes, and filter to obtain a filter cake. The filter cake is re-slurried with water to obtain a co-precipitated filter cake. 1.0kg of 40wt% potassium-type stabilized sil...

Embodiment 2

[0034] Dissolve 5kg iron powder and 200g copper powder in 85L 60wt% nitric acid solution, and dilute to obtain a metal solution, in which the Fe content is 40g / L, and the Cu content is 1.6g / L; 2 CO 3 The aqueous solution was added to the reaction kettle and heated to 85°C; at the same time, the above-mentioned metal solution was also heated to 85°C, added to the reaction kettle under rapid stirring, the reaction time was 15 minutes, the pH value of the slurry was 6.0, and the precipitation was obtained by filtration and washing. The filter cake is precipitated. The co-precipitation filter cake was added with deionized water to form a slurry, and then 1.5 kg of potassium silicate water glass solution (SiO 2 : 26.5wt%, K 2 O: 13.5 wt %), mixed uniformly to obtain a co-precipitated filter cake. 1.35 kg of 30 wt % potassium stabilized silica gel and 0.125 kg of diatomaceous earth were mixed to form a mixed slurry. The mixed slurry was added to the co-precipitation filter cake,...

Embodiment 3

[0036] Prepare a metal solution with ferric nitrate and copper nitrate, wherein the Fe content is 50g / L, and the Cu content is 3.0g / L; 1.2mol / LNa 2 CO 3 The aqueous solution was added to the reaction kettle and heated to 50°C; meanwhile, the above-mentioned metal solution was also heated to 50°C, added to the reaction kettle under rapid stirring, the reaction time was 60 minutes, the pH value of the slurry was 8.0, and the coprecipitation was obtained by filtration and washing. filter cake. The co-precipitation filter cake is added deionized water to beating again, and then 6.5kg of potassium silicate water glass solution (SiO 2 : 27.0wt%, K 2 O: 13.0 wt%), mix well, adjust the pH of the slurry with nitric acid to 7.4, react at 50° C. for 20 minutes, and filter to obtain a filter cake. The filter cake was reslurried to obtain a coprecipitated filter cake. 0.55 kg of montmorillonite was added to 11.0 kg of 30 wt % potassium stabilized silica gel to form a mixed slurry. The...

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Abstract

The invention relates to a high-efficiency wear-resistant slurry bed Fischer-Tropsch synthesis iron-based catalyst and its preparation method and application, comprising the following components Fe: Cu: K: SiO in weight ratio 2 : X=100: 2-10: 1-10: 15-60: 0.5-8; wherein X is a modifying agent, and X is a nanometer inorganic non-metallic material selected from diatomite, montmorillonite or activated clay One or more; mix and react the solution containing Fe and Cu with the precipitating agent, filter and wash to obtain a co-precipitation filter cake; re-slurry the co-precipitation filter cake, add potassium silicate solution to obtain a co-precipitation filter cake; The sol is mixed with the modifier X to obtain a mixed slurry; the coprecipitated filter cake is mixed with the mixed slurry, and stirred to obtain a catalyst slurry; the catalyst slurry is spray-dried and roasted to obtain the desired catalyst. Compared with the prior art, the invention has the advantages of high mechanical strength, good wear resistance, large specific surface area, high reactivity, long service life, simple and easy preparation method, suitable for large-scale industrial production and the like.

Description

technical field [0001] The invention relates to an iron-based catalyst and a preparation method thereof, in particular to a Fischer-Tropsch synthesis iron-based catalyst with high efficiency and wear-resistant slurry state, and a preparation method and application thereof. Background technique [0002] 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, convenient transportation and installation, etc. It is the development trend and research front of Fischer-Tropsch synthesis reactor technology at home and abroad. , the first one million-ton Fischer-Tropsch synthesis industrial demonstration unit in Yulin, Shaanxi Province in China adopts a slurry-bed Fischer-Tropsch synthesis reactor. However, the anti-wear performance of the catalyst applied to the slurry bed reactor is highly required. During the reaction process, the catalyst particles ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01J35/10C10G2/00
CPCC10G2/332B01J23/002B01J23/78B01J2523/00B01J35/60B01J35/635B01J35/633B01J35/615B01J2523/22B01J2523/31B01J2523/41
Inventor 孙启文孙燕张宗森
Owner YANKUANG ENERGY R&D CO LTD
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