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Fischer-Tropsch synthesis catalyst by taking modified alumina as carrier and application thereof

A Fischer-Tropsch synthesis and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of easy generation of fine powder, collision friction, and impact on wax products Issues such as quality improvement and upgrading to achieve the effect of improving wear resistance

Active Publication Date: 2012-05-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalysts in the slurry bed reaction collide and rub against each other very seriously during the reaction, and fine powder is easily produced, which affects the separation of the generated wax and the catalyst, and at the same time affects the upgrading of the wax product.

Method used

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  • Fischer-Tropsch synthesis catalyst by taking modified alumina as carrier and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Modified alumina and its preparation

[0039] Add 75 ml of concentrated ammonia water (analytical pure product, mass fraction 25%) into 75 ml of deionized water, and add 23.44 g of zinc nitrate hexahydrate to dissolve to obtain an alkaline Zn solution, the pH of the solution is about 12.0. 100 grams of γ-alumina (Sasol product, average particle size 55 microns) was added to the above solution, and the solution was left under stirring for 6 hours. After filtering, the filter cake was placed in an oven at 140°C for 6 hours and then calcined in a muffle furnace at 800°C for 4 hours.

[0040] (2) Catalyst and its preparation

[0041] 139 g of cobalt nitrate hexahydrate was dissolved in 50 mL of deionized water to obtain an immersion liquid. After dispersing the carrier obtained in step (1) into the impregnation solution and stirring at room temperature for 1 hour, a dried catalyst sample was obtained by rotary evaporation. After the sample was dried at 120°C for 2 hours, it ...

Embodiment 2

[0053] (1) Modified alumina and its preparation

[0054] Add 75 ml of concentrated ammonia water (analytical pure product, mass fraction 25%) into 75 ml of deionized water, and add 23.44 g of zinc nitrate hexahydrate to dissolve to obtain an alkaline Zn solution, the pH of the solution is about 12.0. 100 grams of γ-alumina (Sasol product, average particle size 55 microns) was added to the above solution, and the solution was left under stirring for 6 hours. After filtering, the filter cake was placed in an oven at 140°C for 6 hours and then calcined in a muffle furnace at 800°C for 4 hours.

[0055] (2) Catalyst preparation

[0056] 139 g of cobalt nitrate hexahydrate and 4.50 g of lanthanum nitrate hexahydrate were dissolved in 50 mL of deionized water, and 9.48 g of a Ru 1.5% nitrosyl ruthenium nitrate solution was added to obtain an impregnating solution. After dispersing the carrier obtained in step (1) into the impregnation solution and stirring at room temperature for 1 hour,...

Embodiment 3

[0060] (1) Modified alumina and its preparation

[0061] Add 75 mL of concentrated ammonia (analytical pure product, mass fraction 25%) into 75 mL of deionized water, and add 22.93 g of cobalt nitrate hexahydrate to dissolve to obtain an alkaline Co solution, the pH of the solution is about 12.0. 100g of γ-alumina (Sasol product, average particle size 55 microns) was added to the above solution and the reaction was continuously stirred for 6 hours. After filtering, the filter cake was placed in an oven at 140°C for 6 hours and then calcined in a muffle furnace at 800°C for 4 hours.

[0062] (2) Catalyst preparation

[0063] 139 g of cobalt nitrate hexahydrate and 4.45 g of cerous nitrate hexahydrate were dissolved in 50 mL of deionized water, and 9.48 g of nitrosyl ruthenium nitrate solution containing 1.5% Ru was added to obtain an impregnating solution. Disperse the calcined carrier into the impregnation solution and stir at room temperature for 1 hour, and then rotate it to obta...

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Abstract

The invention relates to Fischer-Tropsch synthesis catalyst by taking modified alumina as a carrier and application thereof; the catalyst contains the carrier and an active metal component loaded on the carrier and selected from iron and / or cobalt, wherein the carrier is alumina modified by the metal component containing one or more auxiliaries of zinc, cobalt and nickel; based on oxide and the carrier, the content of the metal component containing one or more auxiliaries of zinc, cobalt and nickel is 0.5-15% by weight; and a preparation method of the modified alumina comprises the following steps of: (1) preparing an aqueous solution containing alkali and the metal component containing one or more auxiliaries of zinc, cobalt and nickel; (2) dipping the alumina by using the solution prepared in the step (1); and (3) drying and roasting the alumina dipped in the step (2). Compared with the prior art, on the premise of keeping the high activity and the high selectivity, the wearable property of the catalyst provided by the invention is obviously improved.

Description

Invention field [0001] The invention relates to a Fischer-Tropsch synthesis catalyst and its application. Background technique [0002] With the increasing scarcity of global petroleum resources, people are paying more and more attention to environmental protection, and the use of coal and natural gas to prepare clean fuels has attracted more and more attention. [0003] Fischer-Tropsch synthesis refers to the conversion of synthesis gas into hydrocarbons on a catalyst. The products include alkanes and olefins. After deep processing, the products can be processed to obtain high-quality liquid fuels, such as high-quality diesel and aviation kerosene. [0004] There are two commonly used Fischer-Tropsch synthesis catalysts: cobalt-based and iron-based. Compared with iron-based catalysts, cobalt-based catalysts have the advantages of long life and low water vapor shift activity. Fischer-Tropsch synthesis reactors mainly include fixed bed, slurry bed and fluidized bed. The former two ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J23/89C10G2/00
Inventor 吴玉夏国富王奎王倩刘斌孙霞侯朝鹏李明丰聂红李大东
Owner CHINA PETROLEUM & CHEM CORP
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