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Preparation method for cobalt-based Fischer-Tropsch synthesis catalyst

A technology for the synthesis and catalyst of cobalt-based Fischer-Tropsch synthesis, which is applied in the field of preparation of cobalt-based Fischer-Tropsch synthesis catalysts, which can solve problems such as application limitations of cobalt-based Fischer-Tropsch synthesis catalysts, affecting catalyst life, and catalyst deactivation, and achieves suppression of hydrothermal reactions and low cost , the effect of less dosage

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

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Problems solved by technology

This makes the cost of the catalyst much higher than that of Fischer-Tropsch iron-based catalysts
In addition, due to the strong hydrothermal effect of cobalt, it is easy to deactivate the catalyst and affect the life of the catalyst.
The simple treatment of deactivated catalysts by burying or recovering the active component cobalt will cause great environmental pollution
The above factors have limited the industrial application of cobalt-based Fischer-Tropsch synthesis catalysts.

Method used

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

Examples

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Effect test

example 1

[0016] Deactivated CoZr / SiO 2 The catalyst is 50g, and the elemental analysis results show that the zirconium content is 2.85wt%, and the cobalt content is 18.6wt%. First, n-octane and catalyst are used for extraction and separation for 1-2 times, and then ethanol is used for extraction and separation for 1-3 times. The extraction time is 5 hours, and then drying and roasting are carried out. The drying temperature is 90°C, the drying time is 8h, and the calcination is at 350°C for 4 hours. Finally weigh 20g, impregnate according to the amount of 5wt% Co added, weigh 4.94g of cobalt nitrate hexahydrate solution in 27.06g of distilled water, add it to the deactivated catalyst after it is completely dissolved, stir until uniform, age for 5h, and dry at 50°C 24 hours, and baked at 280°C for 10 hours. The resulting catalyst was designated CFT-1.

[0017] Catalyst evaluation test In a high-pressure continuous stirred tank reactor, paraffin was used as a solvent, and pure hydroge...

example 2

[0019] Deactivated CoZr / SiO 2 The catalyst is 50g, and the elemental analysis results show that the zirconium content is 2.85wt%, and the cobalt content is 18.6wt%. First, use n-octane and catalyst to extract and separate 1-2 times, and then use ethanol to extract and separate 2-3 times at room temperature. The extraction time is 2 hours, and the extraction temperature is controlled at 40-50 ° C, and then dried and separated. Roasting. The drying temperature is 80°C, and the drying time is 10 hours. Baking Baking was carried out at 300° C. for 8 hours. Then weigh 20g, according to the amount of impregnating 7.5wt% Co, weigh 7.41g of cobalt nitrate hexahydrate solution in 17.18g of distilled water, add it to the above spent catalyst and stir until it is completely dissolved, age for 20h, and dry at 150°C for 8 hours , baked at 600°C for 2 hours. The obtained catalyst is denoted as CFT-2, and the experimental conditions for catalyst activity evaluation are the same as those ...

example 3

[0021] Deactivated CoZr / SiO 2 The catalyst is 50g, and the elemental analysis results show that the zirconium content is 2.85wt%, and the cobalt content is 18.6wt%. First, use n-octane and catalyst to mix and extract and separate 2-3 times under stirring conditions, then use ethanol to extract and separate 1-3 times, the extraction time is 8 hours, the extraction temperature is controlled at 40-50 °C, and then Dry and roast. The drying temperature is 100°C, and the drying time is 5 hours. Baking Baking was performed at 400° C. for 2 hours. Finally, 20g was weighed, and according to the amount of impregnating 10wt% Co, 9.88g of cobalt nitrate hexahydrate solution was weighed in 22.12g of distilled water, and after it was completely dissolved, it was added to the spent catalyst and stirred until uniform, aged for 10 hours, and dried at 80°C for 6 hours. Baking at 400°C for 6 hours. The obtained catalyst is denoted as CFT-3, and the experimental conditions for catalyst activi...

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Abstract

The invention discloses a preparation method for a cobalt-based Fischer-Tropsch synthesis catalyst. The method comprises the processes of extracting, drying and roasting an inactivated cobalt-based Fischer-Tropsch synthesis catalyst and loading an active ingredient Co by the treated inactivated cobalt-based Fischer-Tropsch synthesis catalyst. The method has the advantages of low cost, simplicity in operation and the like; the prepared catalyst has good stability and high activity; and meanwhile, a new path is provided for reutilization of the inactivated cobalt-based Fischer-Tropsch synthesiscatalyst.

Description

[0001] Field [0002] The invention relates to a preparation method of a cobalt-based Fischer-Tropsch synthesis catalyst. Background technique [0003] Fischer-Tropsch synthesis refers to synthesis gas (CO+H 2 ) Catalyze the reaction of synthesizing hydrocarbon liquid fuel on the catalyst. 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. In the research of Fischer-Tropsch catalysts in the past eighty years, it has been found that Fe, Co and Ru are effective active components of Fischer-Tropsch catalysts, and various promoter elements such as Zr, K and Pt have great influence on the activity of Fischer-Tropsch catalysts, Stability plays an important role, and the carrier of the catalyst is generally amorphous SiO 2 、TiO 2 , ZrO 2 and Al 2 o 3 Mainly. Cobalt-based catalysts can not only generate heavy hydrocarbons to the maximum extent, but als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75C10G2/00
Inventor 李杰张舒冬倪向前陈楠张喜文
Owner CHINA PETROLEUM & CHEM CORP
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