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Fischer-Tropsch synthesis method and Fischer-Tropsch synthesis catalyst

A Fischer-Tropsch synthesis and catalyst technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of selectivity reduction and achieve outstanding selectivity, Improve activity and selectivity, reduce investment and operating costs

Active Publication Date: 2013-02-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The selectivity of low-value products such as methane needs to be further reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] In the preparation method of the cobalt-based Fischer-Tropsch synthesis catalyst of the present invention, the required auxiliary agent can be added in any step, such as impregnating a suitable auxiliary agent before impregnating the active metal component Co or simultaneously, the auxiliary agent can adopt a one-time impregnation loading mode, It is also possible to use two impregnation loading methods, and the auxiliary agent is generally one or more of Re, Zr, Ce, etc., Zr is preferred. Additives generally account for 0.5% to 10% of the weight of the catalyst.

[0018] In the preparation method of the cobalt-based Fischer-Tropsch synthesis catalyst of the present invention, the carrier can be prepared by a sol-gel method. Before loading the active metal component, the composite carrier can be pretreated appropriately, such as including surface modification treatment, etc. as required.

[0019] Surface modification treatment such as surface modification treatment wit...

Embodiment 1

[0026] (1) Weigh 30g of the porous titanium-silicon-platinum oxide composite particle carrier prepared by the sol-gel method for alkali modification treatment. The treatment method and conditions are as follows: add 50ml of 5% ammonium carbonate solution at 50°C In the vehicle, treat for 10 hours. Dry at 60°C for 24 hours, then bake at 280°C for 15 hours.

[0027] (2) The carrier after alkali treatment is impregnated with active components and additives. Based on the final zirconium content of the catalyst of 3%, weigh 2g of zirconium nitrate and dissolve it in 34ml, add it to the above-mentioned modified carrier for impregnation, and adjust the pH value with nitric acid at the same time Equal to 2, aging for 2 hours, drying at 80°C for 6 hours, and baking at 350°C for 4 hours.

[0028] (3) Based on the total catalyst cobalt content of 30wt%, weigh 20.99g of cobalt nitrate and dissolve it in 34ml, add it to the above sample, adjust the pH value to 0.5 with nitric acid, age fo...

Embodiment 2

[0036] Catalyst preparation:

[0037] (1) Weigh 30g of the porous titanium-silicon-platinum oxide composite particle carrier prepared by the sol-gel method for alkali modification treatment. The treatment method and conditions are as follows: add 50ml of 5% ammonium carbonate solution at 50°C In the vehicle, treat for 10 hours. Dry at 60°C for 24 hours, then bake at 280°C for 15 hours.

[0038] (2) The carrier after alkali treatment is impregnated with active components and additives. Based on the final zirconium content of the catalyst of 3%, weigh 2g of zirconium nitrate and dissolve it in 34ml, add it to the above-mentioned modified carrier for impregnation, and adjust the pH value with nitric acid at the same time Equal to 1.5, aged for 2 hours, dried at 80°C for 6 hours, and baked at 350°C for 6 hours.

[0039] (3) Based on the total catalyst cobalt content of 30wt%, weigh 20.99g of cobalt nitrate and dissolve it in 34ml, add it to the above sample, adjust the pH value ...

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Abstract

The present invention discloses a Fischer-Tropsch synthesis method and a Fischer-Tropsch synthesis catalyst. Hydrogen and carbon monoxide are employed as raw materials in the Fischer-Tropsch synthesis method, and at the presence of a cobalt-baed Fischer-Tropsch synthesis catalyst, hydrocarbon products with a carbon number less than 20 are produced with high selectivity under Fischer-Tropsch synthesis conditions; wherein porous titanium-silicon-platinum oxide composite particles are used as carriers in the cobalt-baed Fischer-Tropsch synthesis catalyst; the Co which are supported by using a impregnation method is uses as active components; and the content of the Co is 15% to 40% by weight of the finished catalyst. Compared with the prior art, a very high CO conversion rate can be maintained, while a realtively low carbon dioxide and methane selectivity can be obtained; and at the same time hydrocarbon products with a carbon number less than 20 are produced with high selectivity, by using the catalyst prepared by the method of the present invention.

Description

technical field [0001] The present invention relates to a kind of Fischer-Tropsch synthesis method and Fischer-Tropsch synthesis catalyst, specifically relate to a kind of carbon dioxide and methane selectivity is low, high selectivity produces C 20 Fischer-Tropsch synthesis method and Fischer-Tropsch synthesis catalyst for internal hydrocarbon products. Background technique [0002] Fischer-Tropsch synthesis refers to the reaction in which synthesis gas (carbon monoxide and hydrogen) is catalyzed on a catalyst to synthesize hydrocarbon liquid fuels. Because Fischer-Tropsch synthesis has the advantages of not relying on oil and clean products, and as the world's energy structure changes from a single oil-dependent type to a coal, oil and natural gas co-supply type, with the increasing environmental protection requirements, Fischer-Tropsch synthesis technology will be rapidly developed. develop. [0003] Efficient cobalt-based Fischer-Tropsch catalyst is one of the key tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G2/00B01J23/89
Inventor 倪向前张舒冬张喜文李杰陈楠梁皓
Owner CHINA PETROLEUM & CHEM CORP
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