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Catalyst for Fischer-Tropsch synthetic heavy hydrocarbons and preparation method thereof

A Fischer-Tropsch synthesis and catalyst technology, applied in the preparation of liquid hydrocarbon mixtures, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of easy overheating, difficult reaction heat removal, low selectivity of gasoline and diesel, etc. Achieve the effect of improving activity and promoting dispersion

Active Publication Date: 2013-12-04
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 the Fischer-Tropsch synthesis reaction exists in the prior art because the Fischer-Tropsch synthesis reaction is a strong exothermic reaction. bed, low selectivity of gasoline and diesel, providing a new iron-based catalyst for Fischer-Tropsch synthesis of light hydrocarbons

Method used

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  • Catalyst for Fischer-Tropsch synthetic heavy hydrocarbons and preparation method thereof
  • Catalyst for Fischer-Tropsch synthetic heavy hydrocarbons and preparation method thereof
  • Catalyst for Fischer-Tropsch synthetic heavy hydrocarbons and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Add 500 grams of water to dissolve 451.5 grams of ferric nitrate to obtain material (I), add 12.9 grams of lanthanum nitrate to 20 grams of water and heat to dissolve to obtain material (II), put 15.7 grams of calcium nitrate and 99.72 grams of zinc nitrate in the same container, add 200 grams of water , stirring and dissolving to obtain material (Ⅲ).

[0035] Mix materials I, II, and III, add 625 grams of silica sol material with a weight concentration of 40% under stirring, adjust the acidity of the above-mentioned slurry with ammonia water to make the pH of the mixed slurry = 6.0, and obtain the slurry after sufficient stirring. Carry out the microsphere molding of the slurry made in the spray drier according to the usual method, and finally the internal diameter is 89 millimeters, and the length is 1700 millimeters (φ89 * 1700 millimeters) in the rotary roasting furnace of 500 ℃ roasting 2.0 hours, the preparation The composition becomes:

[0036]50% Fe 100 Ca 6....

Embodiment 2～6

[0054] Adopt the method substantially identical with embodiment 1 to prepare the catalyst with different composition, gained catalyst number and composition are respectively:

[0055] Example 1 50% Fe 100 Ca 6.0 Zn 30.0 La 4.0 o x +50%SiO2 2

Embodiment 2

[0056] Example 2 60% Fe 100 Ca 1.0 Zn 50.0 La 6.0 o x +40%Al 2 o 3

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Abstract

The invention relates to a catalyst for Fischer-Tropsch synthetic heavy hydrocarbons and a preparation method thereof, and mainly solves the problems that in the prior art, because Fischer-Tropsch synthesis reaction is a strongly exothermic reaction, when a fixed bed is used, heat removal of the reaction is difficult, the temperature is easy to fly up, and the catalyst is easy to deactivate; and when a fluidized bed is used, the selectivity of the heavy hydrocarbons (namely hydrocarbons with more than 5 carbon atoms) is low. According to the invention, a technical scheme is used to well solve the problems, and the technical scheme is as follows: an iron-based fluidized bed catalyst is used, wherein the iron-based fluidized bed catalyst adopts at least one substance selected from Si oxide or Al oxide to use as a carrier, and comprises an active component comprising a composition shown as a chemical formula of Fe[100]Ca[a]Zn[b]La[c]O[x] by atomic ratio; a synthetic gas is used as a raw material, and under the conditions of the pressure of 0.5-10MPa, the reaction temperature of 200-600 DEG C, the reaction space velocity of 100-8000 h<-1>, and the raw material gas H2 / CO ratio of 0.1-5.0:1, the raw material contacts with the iron-based fluidized bed catalyst in the fluidized bed for reaction to produce the heavy hydrocarbons. The catalyst can be used in industrial production of fluidized bed Fischer-Tropsch synthesis reactions.

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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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C10G2/00
Inventor 陶跃武庞颖聪
Owner CHINA PETROLEUM & CHEM CORP