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Preparation method for cobalt-based Fischer-Tropsch synthesis catalyst

A Tropschite synthesis and catalyst technology, which is applied in the field of preparation of cobalt-based Fischer-Tropsch synthesis catalysts, can solve the problems of unsuitability for mass use, high cost of precious metal Pt, unattainable catalyst stability and selectivity, etc., so as to improve industrial popularization and use. , the effect of reducing catalyst cost and low methane selectivity

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the use of noble metal Pt can promote the reduction of cobalt, while maintaining a high degree of dispersion of the catalyst and increasing the number of active centers, at a certain content, it can significantly increase the activity stability of the catalyst and improve the TOF of the catalyst, but the cost of noble metal Pt is high , not suitable for mass use in industry
The prior art shows that when using existing conventional preparation methods and using other non-precious metals as additives, the stability and selectivity of the catalyst cannot reach the effect of using the noble metal Pt

Method used

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  • Preparation method for cobalt-based Fischer-Tropsch synthesis catalyst

Examples

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example 1

[0018] Weigh commercially available silica gel (pore volume is 1.06ml / g, specific surface area is 386.81m 2 / g, the following examples all use this silica gel) 30g, distilled water was added dropwise to the beginning of moistening, the volume of water consumed was 48ml, and 48ml of a 20% pyridine solution was added to the silica gel at 50°C, and treated for 10 hours. It was dried at 60°C for 24 hours and then calcined at 280°C for 15 hours. According to the final catalyst zirconium content of 1 wt%, weigh 1.41 g of zirconium nitrate trihydrate, add distilled water to 48 g, and after it is completely dissolved, add it into the above modified carrier silica gel for immersion, age for 3 hours, dry at 50°C for 24 hours, and dry at 280°C for 24 hours. Bake at ℃ for 10 hours. According to the final catalyst cobalt content of 5wt% and Ni content of 0.5wt%, weigh 7.41 g of cobalt nitrate hexahydrate and 0.74 g of nickel nitrate hexahydrate, add distilled water to 48 g, wait for compl...

example 2

[0021] 30 g of commercially available silica gel was weighed, distilled water was added dropwise until it was initially moistened, the volume of water consumed was 48 ml, and 48 ml of a 15% diethanolamine solution was added to the silica gel at 80° C. and stirred. Treated for 30 hours and dried at 90°C for 16 hours. According to the final catalyst zirconium content of 3 wt%, weigh 4.23 g of zirconium nitrate trihydrate, add distilled water to 48 g, and after it is completely dissolved, add it into the above modified carrier silica gel for immersion, age for 3 hours, dry at 150°C for 8 hours, and then dry at 600°C for 3 hours. Bake at ℃ for 2 hours. According to the final catalyst cobalt content of 35wt% and Ni content of 1.5%, the active metal and auxiliary Ni are impregnated in two steps. The first step is to weigh 25.94 g of cobalt nitrate hexahydrate and 1.11 g of nickel nitrate hexahydrate, add distilled water to 48 g, and to be completely dissolved 1, add it to the sampl...

example 3

[0023]30 g of commercially available silica gel was weighed, distilled water was added dropwise until it was initially moistened, the volume of water consumed was 48 ml, and 48 ml of a 5% ethanolamine solution was added to the silica gel at 95 ° C, stirred for 100 hours, and dried at 100 ° C for 8 hours. According to the final catalyst zirconium content of 2 wt%, weigh 2.82 g of zirconium nitrate trihydrate, add distilled water to 48 g, and after it is completely dissolved, add it into the above modified carrier silica gel for immersion, age for 3 hours, dry at 80°C for 12 hours, and then dry at 350°C for 12 hours. calcined at ℃ for 4 hours. According to the final catalyst cobalt content of 20wt% and Ni content of 1%, weigh 29.64 g of cobalt nitrate hexahydrate and 1.48 g of nickel nitrate hexahydrate, add distilled water to 48 g, wait for complete dissolution, add to the sample after impregnated zirconium, and age 3 hours, dried at 80°C for 12 hours, and calcined at 350°C for...

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Abstract

The invention discloses a preparation method for a cobalt-based Fischer-Tropsch synthesis catalyst. The method comprises the following processes of: performing surface modification on a silica gel carrier by adopting a nitrogen-containing organic compound solution, and then loading a metallic aid X1, a metallic aid X2 and an active ingredient Co by adopting an immersion method, wherein the metallic aid X1 is one or more of Re, Zr, Hf, Ce and Th; and the metallic aid X2 is one or more of Ni, Mo and W. The catalyst prepared by adopting the method has the advantages of high activity, good stability and low cost; and the preparation method is simple and suitable for industrial application.

Description

technical field [0001] The invention relates to a preparation method of a cobalt-based Fischer-Tropsch synthesis catalyst, in particular to the preparation of a low-cost, high-activity-stability cobalt-based Fischer-Tropsch synthesis catalyst modified by adding metal assistants with modified silica gel as a carrier method. Background technique [0002] Fischer-Tropsch synthesis refers to syngas (CO+H 2 ) catalyzes the reaction of synthesizing hydrocarbon liquid fuels on catalysts. With the increasing depletion of petroleum resources, the preparation of liquid fuels by Fischer-Tropsch synthesis has attracted more and more attention from all over the world. Catalyst is one of the key technologies of Fischer-Tropsch synthesis reaction. In the research of Fischer-Tropsch catalysts in the past 80 years, it has been found that Fe, Co and Ru are metals with Fischer-Tropsch activity. High activity, the catalyst is prone to carbon deposition and poisoning when the reaction tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38C10G2/00
Inventor 李杰张舒冬倪向前陈楠张喜文
Owner CHINA PETROLEUM & CHEM CORP
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