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A kind of reduction method of cobalt-based Fischer-Tropsch synthesis catalyst

A catalyst and Tropsch synthesis technology, which is applied in the reduction field of cobalt-based Fischer-Tropsch synthesis catalysts, can solve the problems of reducing the initial activity of the catalyst, and achieve the effects of reducing methane selectivity, improving activity, and optimizing product selectivity

Active Publication Date: 2016-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method effectively reduces the initial activity of the catalyst, so that the Fischer-Tropsch synthesis unit can run smoothly, but the activity of the catalyst in the stable period of the Fischer-Tropsch synthesis reaction still needs to be further improved, and the product distribution needs to be further optimized

Method used

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  • A kind of reduction method of cobalt-based Fischer-Tropsch synthesis catalyst

Examples

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Effect test

example 1

[0019] Loaded Cobalt-based Fischer-Tropsch Synthesis Catalyst 20%Co0.8%Pt3%Zr / SiO 2 (Wt.), under normal pressure, through the inert gas, the space velocity is 500h -1 , completely replace the air in the reduction system with an inert gas at normal temperature and pressure, then maintain the pressure of the reduction system at 0.1 MPa, raise the temperature from room temperature to 300 °C at 1 °C / min, dry for 12 hours, and then cool down to 120 °C. Switch to 5% H 2 Mixed gas with inert gas, the space velocity is 2000h -1 , from 120°C to 300°C at 1°C / min, and then gradually increase the H in the mixture 2 The concentration is above 90%, reduced for 24h under the microwave frequency of 3000MHz, and then cooled down to 120°C. Introduce hydrogen containing 2% water vapor with a space velocity of 500h -1 , the temperature was raised from 120°C to 200°C at 1°C / min, maintained for 12 hours, and then lowered to 120°C. Switch to 5% H 2 Mixed gas with inert gas, the space velocity ...

example 2

[0022] Loaded Cobalt-based Fischer-Tropsch Synthesis Catalyst 20%Co1%Ni3%Zr / TiO 2 (Wt.), under normal pressure, through the inert gas, the space velocity is 1500h -1 , use inert gas to completely replace the air in the reduction system at normal temperature and pressure, then increase the pressure of the reduction system to 1.0MPa, raise the temperature from room temperature to 400°C at 3°C / min, dry for 8 hours, and then cool down to 120°C . Switch to 5% H 2 Mixed gas with inert gas, the space velocity is 4000h -1 , from 120°C to 400°C at 3°C / min, and then gradually increase the H in the mixture 2 The concentration is above 90%, and it is reduced under the action of microwave frequency of 9000MHz for 8h, and then the temperature is lowered to 120°C. Introduce hydrogen containing 4% methanol vapor with a space velocity of 1500h -1 , the temperature was raised from room temperature to 250°C at 3°C / min, maintained for 8 hours, and then cooled to 120°C. Switch to 5% H 2 Mix...

example 3

[0025] Loaded Cobalt-based Fischer-Tropsch Synthesis Catalyst 20%Co0.05%Ru3%Zr / Al 2 o 3 (Wt.), under normal pressure, through the inert gas, the space velocity is 1000h -1 , use an inert gas to completely replace the air in the reduction system at normal temperature and pressure, then increase the pressure of the reduction system to 0.5MPa, raise the temperature from room temperature to 350°C at 2°C / min, dry for 10 hours, and then cool down to 120°C . Switch to 5% H 2 Mixed gas with inert gas, the space velocity is 3000h -1 , from 120°C to 350°C at 2°C / min, then gradually increase the H in the mixture 2 The concentration is above 90%, reduced for 16 hours under the action of microwave frequency of 6000MHz, and then cooled down to 120°C. Introduce hydrogen containing 3% ethanol vapor, the space velocity is 1000h -1 , the temperature was raised from room temperature to 220°C at 2°C / min, maintained for 10 hours, and then cooled to 120°C. Switch to 5% H 2 Mixed gas with in...

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Abstract

The invention discloses a reduction method of a cobalt-based Fischer-Tropsch synthesis catalyst. The reduction method comprises following steps: gas replacement; catalyst drying; reduction processes before passivation; passivation processes; and reduction processed after passivation; wherein the reduction processes before passivation are performed in the presence of microwave. The reduction method is capable of increasing activity and stability of the cobalt-based Fischer-Tropsch synthesis catalyst, reducing initial activity of the cobalt-based Fischer-Tropsch synthesis catalyst, and realizing smooth operation of Fischer-Tropsch synthetic apparatuses.

Description

technical field [0001] The invention relates to a reduction method of a cobalt-based Fischer-Tropsch synthesis catalyst. Background technique [0002] The conversion of synthesis gas, ie carbon monoxide and hydrogen, into high value products is well known and has been used in industry for many years. Typical processes include: methanol synthesis, higher alcohol synthesis, hydroformylation and Fischer-Tropsch synthesis. Fischer-Tropsch synthesis refers to the reaction in which synthesis gas is catalyzed on a catalyst to synthesize hydrocarbon liquid fuels. 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. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/34B01J37/18B01J33/00B01J23/89B01J23/755C10G2/00
Inventor 李杰张舒冬尹泽群宋喜军刘全杰倪向前
Owner CHINA PETROLEUM & CHEM CORP
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