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Preparation method of cobalt-based Fischer-Tropsch synthesis catalyst

A technology for catalyst and Tropsch synthesis, which is applied in the field of preparation of cobalt-based Fischer-Tropsch synthesis catalysts, can solve problems such as unsatisfactory activity stability, and achieve the effects of excellent activity stability, inhibition of generation, and reduction of strong interactions

Active Publication Date: 2015-07-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies of the prior art, especially for the problem of unsatisfactory activity stability of cobalt-based Fischer-Tropsch synthesis catalysts under long-period and high-space-velocity operating conditions, the present invention discloses a preparation of a cobalt-based Fischer-Tropsch synthesis catalyst method, the preparation process of this method is simple, and the catalyst shows excellent activity stability under the operation conditions of long period and high space velocity, and is suitable for industrial application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Weigh commercially available silica gel (the pore volume is 1.06ml / g, the specific surface area is 386.81m 2 per 10 grams of this silica gel with distilled water added dropwise until the volume of water consumed during initial moistening is 16ml, the following examples all use this silica gel) 30g, based on the final catalyst zirconium content of 3wt%, weigh zirconium nitrate and dissolve it in 48ml, add Immerse in the above silica gel carrier, age for 3 hours, and dry at 80° C. for 8 hours. Put the above-mentioned zirconium-containing silica gel into a fixed bed reactor, and after gas replacement to ensure that the volume concentration of oxygen in the fixed bed is less than 99.9%, a hydrogen / carbon monoxide gas mixture with a volume ratio of 4:1 is introduced, which comes from a gas mixture heating furnace The temperature of the hydrogen / carbon monoxide mixture is 450°C and the volumetric space velocity is 1000 h -1 , the treatment time is 15h, and the system pressur...

example 2

[0028] Weigh 30g of commercially available silica gel, based on the final catalyst zirconium content of 1wt%, weigh zirconium nitrate and dissolve it in 48ml, add it to the silica gel carrier for impregnation, age for 3 hours, and dry at 80°C for 8 hours. Put the above-mentioned zirconium-containing silica gel into a fixed-bed reactor, and after gas replacement to ensure that the volume concentration of oxygen in the fixed bed is less than 99.9%, a hydrogen / carbon monoxide mixed gas with a volume ratio of 5:1 is introduced, which comes from a mixed gas heating furnace The temperature of the hydrogen / carbon monoxide mixture is 300°C and the volumetric space velocity is 1300 h -1 , the treatment time is 10h, and the system pressure is 1.5MPa. Based on the final catalyst cobalt content of 30wt%, weighed cobalt nitrate and dissolved it in 48ml, added to the above-mentioned treated zirconium-containing silica gel carrier, aged for 3 hours, dried at 80°C for 8 hours, and calcined at...

example 3

[0030]Weigh 30g of commercially available silica gel, based on the final catalyst zirconium content of 5wt%, weigh zirconium nitrate and dissolve it in 48ml, add the above-mentioned modified carrier silica gel for impregnation, age for 3 hours, and dry at 80°C for 8 hours. Put the above-mentioned zirconium-containing silica gel into a fixed-bed reactor, and after gas replacement to ensure that the volume concentration of oxygen in the fixed bed is less than 99.9%, a hydrogen / carbon monoxide mixed gas with a volume ratio of 3:1 is introduced, which comes from a mixed gas heating furnace The temperature of the hydrogen / carbon monoxide mixture is 500°C and the volumetric space velocity is 900 h -1 , the treatment time is 20h, and the system pressure is 0.5MPa. Based on the final catalyst cobalt content of 10wt%, weighed cobalt nitrate and dissolved it in 48ml, added to the above-mentioned treated zirconium-containing silica gel carrier, aged for 3 hours, dried at 80°C for 8 hours...

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Abstract

The invention discloses a preparation method of a cobalt-based Fischer-Tropsch synthesis catalyst. The preparation method comprises following steps: (1) silicon dioxide is taken as a carrier, loading of auxiliary agent zirconium is carried out via immersion method, and the loaded carrier is dried for 8 to 24h at a temperature of 50 to 150 DEG C; (2) hydrogen / carbon monoxide mixed gas with a volume ratio of 5:1 to 3:1 is added for pre-treatment of the dried zirconium-containing silicon dioxide, wherein the temperature of the mixed gas ranges from 250 to 550 DEG C, volume space velocity ranges from 800 to 1500 / h, and treatment time ranges from 1 to 20h; and (3), the zirconium-containing silicon dioxide pre-treated with the hydrogen / carbon monoxide mixed gas is taken as a carrier, loading of the active component cobalt is carried out via immersion method, and the zirconium-containing silicon dioxide carrier is dried and roasted so as to obtain the cobalt-based Fischer-Tropsch synthesis catalyst. Preparation processes are simple; and the cobalt-based Fischer-Tropsch synthesis catalyst possesses excellent activity and stability in long-period and high space velocity operation conditions, and is suitable for industrialized application.

Description

technical field [0001] The invention relates to a preparation method of a cobalt-based Fischer-Tropsch synthesis catalyst, in particular to a preparation method of a highly active and stable cobalt-based Fischer-Tropsch synthesis catalyst with silica gel as a carrier. Background technique [0002] 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. Stability plays an important role, and the support of the catalyst is amorphous SiO 2 、TiO 2 and Al 2 o 3 Mainly. How to effectively and rationally match active components, metal promoters and supports to prepare Fischer-Tropsch synthesis catalysts with high ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75C10G2/00
Inventor 李杰张舒冬张喜文倪向前宋喜军
Owner CHINA PETROLEUM & CHEM CORP
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