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Preparation method of cobalt-based catalyst for Fischer Tropsch synthesis

A technology of cobalt-based catalyst and Fischer-Tropsch synthesis, which is applied in the preparation of liquid hydrocarbon mixtures, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as the complexity of the preparation process, achieve high activity, improve dispersion, and avoid pollution effect

Active Publication Date: 2013-10-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation process is complex

Method used

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

Examples

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example 1

[0021] Weigh commercially available silica gel (pore volume is 1.06ml / g, specific surface area is 386.81m 2 / g, the following examples all use the silica gel) 30g, distilled water is added dropwise to initial moistening, and the volume of consumed water is 48ml. Weigh 2.223g of cobalt nitrate hexahydrate, add distilled water to 48g, add to the silica gel carrier to impregnate, age for 3 hours, dry at 50°C for 24 hours, and bake at 280°C for 10 hours. Based on the final catalyst zirconium content of 1wt%, weigh 1.41g of zirconium nitrate trihydrate, add distilled water to 48g, wait until it is completely dissolved, add it to the carrier silica gel for impregnation, age for 3 hours, dry at 150°C for 8 hours, and roast at 600°C 10 hours. According to the final catalyst cobalt content of 5wt%, weigh the remaining cobalt nitrate hexahydrate, add distilled water to 48g, and wait until it is completely dissolved, add it to the above-mentioned sample impregnated with zirconium, age f...

example 2

[0024]Weigh 30g of commercially available silica gel, add distilled water dropwise until initial moistening, and the volume of consumed water is 48ml. Weigh 7.782g of cobalt nitrate hexahydrate, add distilled water to 48g, add to the silica gel carrier for impregnation, age for 3 hours, dry at 150°C for 8 hours, and bake at 600°C for 2 hours with a firing pressure of 2MPa. According to the final catalyst zirconium content of 3wt%, weigh 4.23g of zirconium nitrate trihydrate, add distilled water to 48g, wait for complete dissolution, add carrier silica gel to impregnate, age for 3 hours, dry at 100°C for 10 hours, and roast at 900°C for 2 Hour. According to the final catalyst cobalt content of 35wt%, weigh the remaining cobalt nitrate hexahydrate, add distilled water to 48g, add it to the sample impregnated with zirconium after it is completely dissolved, age for 3 hours, dry at 150°C for 8 hours, and roast at 600°C 2 hours. The resulting catalyst is designated CFT-2. The ex...

example 3

[0026] Weigh 30g of commercially available silica gel, add distilled water dropwise until initial moistening, and the volume of consumed water is 48ml. Weigh 1.482g of cobalt nitrate hexahydrate, add distilled water to 48g, add to the silica gel carrier to impregnate, age for 3 hours, dry at 80°C for 12 hours, and bake at 700°C for 6 hours with a firing pressure of 3MPa. According to the final catalyst zirconium content of 2wt%, weigh 2.82g of zirconium nitrate trihydrate, add distilled water to 48g, wait for complete dissolution, add carrier silica gel for impregnation, aging for 3 hours, dry at 150°C for 24 hours, and roast at 800°C for 4 Hour. According to the final catalyst cobalt content of 20wt%, weigh the remaining cobalt nitrate hexahydrate, add distilled water to 48g, wait for complete dissolution, add to the above sample impregnated with zirconium, age for 3 hours, dry at 80°C for 12 hours, and roast at 350°C 4 hours. The resulting catalyst is designated CFT-3. Th...

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Abstract

The invention discloses a preparation method of a cobalt-based catalyst for Fischer Tropsch synthesis. The preparation method comprises the following steps of: with silica gel as a carrier, immersing a metal additive and an active component Co by adopting an immersion method, wherein a substep immersion process is adopted for the active component Co and is in the term of the weight content of the active component in a final catalyst; and immersing 1-30 percent of active component Co before the metal additive is immersed, and immersing the balance of active component Co after the metal additive is immersed. According to the preparation method provided by the invention, no acid, alkali, organic solvent and the like need not to be used for modifying the surface of a carrier; the prepared cobalt-based catalyst for the Fischer Tropsch synthesis has high activity and good stability; and the preparation method is simple.

Description

technical field [0001] The invention relates to a method for preparing a cobalt-based catalyst for Fischer-Tropsch synthesis, in particular to a method for preparing a cobalt-based Fischer-Tropsch synthesis catalyst with silica gel as a carrier. Background technique [0002] 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. 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 effective active components of Fischer-Tropsch catalysts. Activity and stability play an important role, and the carrier of the catalyst is generally amorphous SiO 2 、TiO 2 and Al 2 o 3 Mainly. How to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75B01J23/888C10G2/00
Inventor 李杰张舒冬倪向前陈楠张喜文
Owner CHINA PETROLEUM & CHEM CORP
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