Fluidized bed Tropsch synthesis method for heavy hydrocarbons

A technology for Fischer-Tropsch synthesis and heavy hydrocarbons, which is applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, chemical/physical processes, etc. It can solve problems such as easy overheating, difficulty in removing heat from reactions, and easy deactivation of catalysts. To achieve the effect of enhancing the activity

Active Publication Date: 2014-01-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem 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, the reaction is difficult to remove heat, and the temperature is easy to fly, so that the catalyst is easily deactivated; when using a fluidized bed, select To solve the problem of low stability, provide a new method for the synthesis of heavy hydrocarbons in a fluidized bed Fischer-Tropsch

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 15 grams of water to 5.23 grams of potassium hydroxide and dissolve after heating to obtain material (A); dissolve 449.4 grams of cobalt nitrate and 27.2 grams of nickel nitrate in 500 grams of hot water at 60 to 90°C 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, the slurry that will make is carried out microsphere molding in spray drier according to usual method, at last internal diameter is 89 millimeters, and length is 1700 millimeters ( mm) in a rotary roaster at 500°C for 2.0 hours to make the composition:

[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 i...

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:

[0034] Example 1 50%Co 100 K 5.0 Ni 6.0 o x +50% SiO2 2 .

Embodiment 2

[0035] Example 2 40%Co 100 Na 2.0 Cs 2.0 Cr15.0 o x +60% Al 2 o 3

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Abstract

The invention relates to a Tropsch synthesis method for heavy hydrocarbons, which mainly solves the problems that the reaction heat dissipation is difficult, temperature runaway is easily caused and the catalyst is easily inactivated when a fixed bed is used and the selectivity of the heavy hydrocarbons is low when a fluidized bed is used in the prior art because the Tropsch synthesis reaction is strong heat generating reaction. Synthesis gas is used as a raw material; under the conditions that the reaction pressure is 0.5 to 10MPa, the reaction temperature is 200 to 600 DEG C, the reaction space velocity is 100 to 8,000 per hour and the H2 / CO molar ratio of the raw material gas is 0.1-5.0: 1, the raw material is contacted with a cobalt-based fluidized bed catalyst in the fluidized bed and reacted to generate the heavy hydrocarbons, wherein the heavy hydrocarbons are hydrocarbons of over C5; and in the cobalt-based fluidized bed catalyst, at least one of oxides of Si and Al or mixture of Si or Al and ZrO2 is selected as a carrier, and the active ingredient contains the following compound with chemical formula in an atomic ratio: Co100AaBbOx, wherein in the formula, A is selected from at least one of alkali metals or alkaline earth metals, and B is selected from at least one of Cr, Ni, Cu and Zn. According to the technical scheme, the problems are well solved, and the method can be used in the industrial production of fluidized bed Tropsch synthesis reaction.

Description

technical field [0001] The invention relates to a method for synthesizing heavy hydrocarbons in a fluidized bed Fischer-Tropsch. 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 prod...

Claims

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Application Information

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