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Fischer-Tropsch synthesized Co-based fluidized bed catalyst and preparation method thereof

A fluidized bed catalyst, Fischer-Tropsch synthesis technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of easy deactivation of catalysts, difficult reaction heat removal, low selectivity, etc. , to reduce energy consumption, simplify the process, and promote the effect of dispersion

Active Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by this invention is that in the prior art, because the Fischer-Tropsch synthesis reaction is a strong exothermic reaction, when using a fixed bed, it is difficult to remove heat from the reaction, and it is easy to overheat, which makes the catalyst easily deactivated; when using a fluidized bed , problem of low selectivity, providing a new cobalt-based fluidized bed catalyst for Fischer-Tropsch synthesis

Method used

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  • Fischer-Tropsch synthesized Co-based fluidized bed catalyst and preparation method thereof
  • Fischer-Tropsch synthesized Co-based fluidized bed catalyst and preparation method thereof
  • Fischer-Tropsch synthesized Co-based fluidized bed catalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] 5.23 g of potassium hydroxide was dissolved in 15 g of water to obtain material (A); 449.4 g of cobalt nitrate and 27.2 g of nickel nitrate were dissolved in 500 g of water to obtain material (B).

[0029] Material (A) is mixed with 312.5 grams of silica sol with a weight concentration of 40%, and material (B) is added under stirring, and the acidity of the above-mentioned slurry is adjusted with ammonia water to make the pH of the mixed slurry=6.0, and the slurry is obtained after fully stirring material (solid content is 15%), according to the usual method, the prepared slurry is carried out into microspheres in a spray dryer. The inlet temperature of the sprayer is 360 ° C, and the outlet temperature is 210 ° C. Roasting for 2.0 hours, the composition is:

[0030] 50%Co 100 K 5.0 Ni 6.0 o x +50% SiO2 2

[0031] The experimental results of the Fischer-Tropsch synthesis reaction of the prepared catalyst are listed in Table 1.

Embodiment 2～8

[0033] Adopt the method substantially identical with embodiment 1 to prepare the catalyst with different composition, gained catalyst number and composition are respectively:

Embodiment 2

[0034] Example 2 40%Co 100 Na 2.0 Cs 2.0 Cr 15.0 o x +60% Al 2 o 3 (The pH value of the slurry is 1; the solid content is 45%; the spraying conditions: the inlet is 200°C, the outlet is 100°C; the roasting temperature is 700°C, and the time is 0.15 hours)

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Abstract

The invention relates to a Fischer-Tropsch synthesized Co-based fluidized bed catalyst and a preparation method thereof, mainly solving the problems existing in the prior art because an Fischer-Tropsch synthesis reaction is a strong exothermic reaction which causes thermal withdrawal difficulty in a reactor, temperature runaway and easy catalyst inactivation in case of using a fixed bed, and relatively low selectivity of heavy hydrocarbon in case of using a fluidized bed. By adopting the preparation method and the technical scheme that at least one of oxides of Si or Al or a mixture of the at least one oxide and ZrO2 is selected as a carrier, and the active constituent contains the following composition with a chemical formula in the atomic ratio of Co100AaBbOx, wherein A is selected from at least one of alkali metal or alkaline earth metal, B is selected from at least one of Cr, Ni, Cu and Zn to be combined into a catalyst, the invention favorably solves the problems and can be used in the industrial production of the Fischer-Tropsch synthesis reaction.

Description

technical field [0001] The invention relates to a cobalt-based fluidized bed catalyst for Fischer-Tropsch synthesis and a preparation method thereof. Background technique [0002] The method of converting synthesis gas into liquid hydrocarbons through catalyst action was invented by German scientists Frans Fischer and Hans Tropsch in 1923, referred to as F-T synthesis, that is, CO undergoes a heterogeneous catalytic hydrogenation reaction on a metal catalyst to produce linear alkanes and Olefin-based mixture process. Since P.Sabatier and J.D.Senderens discovered CO hydrogenation on Ni catalyst to produce methane in 1902, the development of F-T synthesis has gone through a tortuous historical process, and has obtained major improvements and breakthroughs, and has been applied in industry. [0003] After decades of development, Fischer-Tropsch synthesis catalysts have also been greatly developed. Currently, commonly used catalysts are divided into two categories in terms of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J23/86B01J23/80B01J37/00C10G2/00
Inventor 郭宗英陶跃武庞颖聪
Owner CHINA PETROLEUM & CHEM CORP
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