Micro spherical Fischer-Tropsch synthesis catalyst and preparation method thereof

A Fischer-Tropsch synthesis and catalyst technology, applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, catalysts for physical/chemical processes, etc. , to achieve the effect of promoting dispersion, improving the activity of the catalyst, and improving the technical effect.

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] One of the technical problems to be solved by this invention is that in the prior art, the Fischer-Tropsch synthesis reaction is a strong exothermic reaction. When using a fixed bed, the reaction is difficult to remove

Method used

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  • Micro spherical Fischer-Tropsch synthesis catalyst and preparation method thereof
  • Micro spherical Fischer-Tropsch synthesis catalyst and preparation method thereof
  • Micro spherical Fischer-Tropsch synthesis catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] [Example 1]

[0037] Dissolve 424.2 g of ferric nitrate with 500 g of water to obtain material (I), 3.52 g of potassium hydroxide and 10 g of water for heating to dissolve to obtain material (II), 5.25 g of chromium trioxide plus 10 g of water, stir and dissolve to obtain material (Ⅲ) , Add 184.1 grams of manganese nitrate to material (I) to obtain material (IV).

[0038] Under stirring, add 625 grams of silica sol material with a weight concentration of 40% to material (IV), and then slowly add material (II) and material (III); adjust the acidity of the slurry with ammonia water to make the mixed slurry pH=6.0, after fully stirring, the slurry is obtained. The slurry is formed into microspheres in a spray dryer according to the usual method. Finally, the inner diameter is 89 mm and the length is 1700 mm (φ89×1700 mm). Roasting in a rotary roasting furnace at 500°C for 2.0 hours, the resulting composition is:

[0039] 50% Fe 100 K 5.0 Mn 50.0 Cr 5.0 O x +50%SiO 2 .

[0040] C...

Example

[0057] 【Examples 2~6】

[0058] The catalysts with different compositions were prepared by basically the same method as in Example 1, and the numbers and compositions of the obtained catalysts were as follows:

[0059] Example 1 50% Fe 100 K 5.0 Mn 50.0 Cr 5.0 O x +50%SiO 2

Example Embodiment

[0060] Example 2 60% Fe 100 Li 3.0 Mn 10.0 Cr 6.5 O x +40%Al 2 O 3

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Abstract

The invention relates to a heavy hydrocarbon Fischer-Tropsch synthesis catalyst and a preparation method thereof. Since a Fischer-Tropsch synthesis reaction is a strong exothermic reaction, when a fixed bed is used, reaction heat is difficult to remove, temperature runaway is easily caused and a catalyst is easily inactivated and when a fluidized bed is used, selectivity of heavy hydrocarbon (hydrocarbons containing more than five carbon atoms) is low. By adoption fo the heavy hydrocarbon Fischer-Tropsch synthesis catalyst and the preparation method thereof, provided by the invention, all the problems in the prior art can be solved. According to the technical scheme, an iron-based fluidized bed catalyst is adopted, wherein at least one of Si and Al oxides is taken as a carrier of the catalyst and the active component of the catalyst contains a composition with the following chemical formula in atomic ratio: Fe100AaMnbCrcOx; and synthetic gas serving as raw material comes into contact with the iron-based fluidized bed catalyst in a fluidized bed to react under the conditions that the reaction pressure is 0.5-10MPa, the reaction temperature is 200-600 DEG C, reaction air speed is 100-8000/h and ratio of H2/CO in the raw material gas is (0.1-5.0):1, so as to generate heavy hydrocarbon. The heavy hydrocarbon Fischer-Tropsch synthesis catalyst can be applied to industrial production of fluidized bed Fischer-Tropsch synthesis reaction.

Description

technical field [0001] The invention relates to a catalyst for Fischer-Tropsch synthesis of heavy hydrocarbons 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. 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 (Saso...

Claims

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Application Information

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IPC IPC(8): B01J23/889C10G2/00
Inventor 陶跃武庞颖聪
Owner CHINA PETROLEUM & CHEM CORP
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