Fischer-Tropsch synthesis method for heavy hydrocarbon

A technology for Fischer-Tropsch synthesis and heavy hydrocarbons, which is applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, metal/metal oxide/metal hydroxide catalysts, etc. Response heat removal is difficult and other problems, to achieve the effect of promoting dispersion, improving activity and stability

Active Publication Date: 2011-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present 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, so that the catalyst is easily deactivated; when using a fluidized bed, the product The problem of low selectivity provides a new method for Fischer-Tropsch synthesis of heavy hydrocarbons

Method used

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  • Fischer-Tropsch synthesis method for heavy hydrocarbon

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Embodiment 1

[0030] Add 5 grams of water to 1.85 grams of potassium hydroxide and dissolve after heating to obtain material (A); 371.7 grams of ferric nitrate and 55.0 grams of copper nitrate are dissolved in 450 grams of hot water at 60 to 90°C to obtain material (B); Lanthanum nitrate, add 40 grams of water, heat and dissolve as material (C).

[0031] Material (A) is mixed with 687.5 grams of silica sol with a weight concentration of 40%, and materials (B) and (C) are added successively under stirring, and the acidity of the above-mentioned slurry is adjusted with ammonia water so that the pH of the mixed slurry=6.0, after After fully stirring, slurry is obtained, and the slurry made is carried out into microspheres in a spray drier according to the usual method, and the inner diameter is 89 millimeters at last, and the length is 1700 millimeters ( mm) in a rotary roaster at 500°C for 2.0 hours to make the composition:

[0032] 40% Fe 100 K 3.0 La 6.0 Cu 25.0 o x +60% SiO2 2

[...

Embodiment 2～4

[0035] Adopt the method substantially identical with embodiment 1 to prepare the catalyst with different composition, gained catalyst number and composition are respectively:

[0036] 1 40%Fe 100 K 3.0 La 6.0 Cu 25.0 o x +60% SiO2 2

[0037] 2 45% Fe100 K 2.0 La 3.0 Ce 2.5 Cu 20.0 o x +55%Al 2 o 3

[0038] 3 50%Fe 100 K 1.0 Cs 3.0 Ce 4.5 Cu 10.0 mn 8.0 o x +50% SiO2 2

[0039] 4 50% Fe 100 Ca 4.5 Ce 3.0 Cu 45.0 o x +50% (70% SiO 2 +30%Al 2 o 3 )

[0040] 5 55% Fe 100 Ca 3.0 Mg 3.0 La 2.0 mn 30.0 o x +45%SiO2 2

[0041] 6 60% Fe 100 Na 2.0 Mg 3.0 Cu 50.0 o x +40% SiO2 2

[0042] The prepared catalyst was subjected to Fischer-Tropsch synthesis reaction under the following reaction conditions, and the results are shown in Table 1.

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Abstract

The invention relates to a Fischer-Tropsch synthesis method for heavy hydrocarbon, mainly solving the problems that as the Fischer-Tropsch synthesis reaction is an exothermal reaction, in the prior art, when a fixed bed is used, heat is difficultly removed for reaction and the temperature is easy to run away so that a catalyst is easy to inactivate; and when a fluidized bed is used, the selectivity of the heavy hydrocarbon is low. In the Fischer-Tropsch synthesis method, a synthesized gas is taken as a raw material; and the raw material is contacted and reacted with a fluidized bed catalyst at the conditions of 0.5-10MPa of pressure, 200-600 DEG C of reaction temperature and 100-8000 h<-1> of reaction air speed, so as to generate the heavy hydrocarbon, wherein the used iron-based fluidized bed catalyst takes at least one oxide selected from Si or Al as a carrier; and an active component contains a composition having the chemical formula based on an atom ratio as follows: Fe100AaBbCcOx, wherein A is selected from at least one of alkali metals or alkaline-earth metals, B is selected from at least one of La or Ce, and C is selected from at least one of Cu or Mn. By using the technical scheme of the method, the problems can be better solved. The method can be used in industrial production of Fischer-Tropsch synthesis reaction.

Description

technical field [0001] The invention relates to a method for Fischer-Tropsch synthesis of heavy hydrocarbons. 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. Germany carried out research and development in the 1920s and realized industrialization in 1936. After World War II, it was closed because it could not compete economically with the oil industry; South Africa has abundant coal resources, but lacks oil resources and has long-term Restricted by international social economic and political sanctions, it was forced to develop coal-to-oil industrial technology, and built the first coal-based F-T synthetic oil plant (Sasol-1) with a production capacity of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G2/00B01J23/889B01J23/83B01J23/78
Inventor 陶跃武郭宗英庞颖聪
Owner CHINA PETROLEUM & CHEM CORP
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