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Preparation method of cu-based water gas shift reaction catalyst

A transformation reaction, water gas technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor performance reproducibility, environmental pollution, etc., and achieve stable structure and performance, high activity Effect

Active Publication Date: 2022-03-01
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the one-step precipitation method is used to simultaneously precipitate Cu at a fixed pH value. 2+ , Zn 2+ and Al 3+ ions, due to Cu 2+ , Zn 2+ and Al 3+ There is a large difference in the pH value of the complete precipitation of ions, and the reproducibility of the prepared catalyst composition and water gas shift reaction performance is poor; and the method of complex precipitation will produce a large amount of ammonia nitrogen wastewater, polluting the environment

Method used

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  • Preparation method of cu-based water gas shift reaction catalyst
  • Preparation method of cu-based water gas shift reaction catalyst
  • Preparation method of cu-based water gas shift reaction catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Accurately weigh the mass to be 18.2248g Cu(NO 3 ) 2 ·3H 2 O and 66.2234g Al(NO 3 ) 3 9H 2 O was prepared into 400ml mixed brine solution and 55.0138g Na 2 CO 3 Add dropwise to 500ml of deionized water; use the co-current co-precipitation method, control the temperature of the water bath at 80°C, and mechanically stir, and the pH value of the reaction system is 7.5. After the above solution was added dropwise, the reaction was continued for 3 h under stirring conditions. Naturally cooled, the precipitate was centrifuged, washed, dried at 110°C for 10h, and calcined in a static air atmosphere at 500°C for 6h to obtain CuO-CuAl-containing 2 o 4 / Al 2 o 3 of composite oxides.

[0033] Weigh 8g containing CuO-CuAl 2 o 4 / Al 2 o 3 composite oxide, add 25ml Zn(NO 3 ) 2 solution (0.87mol / L), impregnated and adsorbed at room temperature for 3h, dried at 110°C for 10h, and roasted in a static air atmosphere at 400°C for 3h to obtain CuO-CuAl-containing 2 o 4 / ...

Embodiment 2

[0037] Accurately weigh the mass to be 17.1960g Cu(NO 3 ) 2 ·3H 2 O and 68.7399g Al(NO 3 ) 3 9H 2 O was prepared by dissolving 400ml of mixed salt solution and 29.1273g of KOH in 500ml of deionized water; using the co-current co-precipitation method, controlling the temperature of the water bath at 80°C, stirring mechanically, and the pH of the reaction system was 8.0. After the salt solution was added dropwise, the reaction was continued for 2 h under stirring conditions. Naturally cooled, the precipitate was centrifuged, washed, dried at 110°C for 10h, and calcined in a static air atmosphere at 800°C for 2h to obtain CuO-CuAl-containing 2 o 4 / Al 2 o 3 of composite oxides.

[0038] Weigh 8g containing CuO-CuAl 2 o 4 / Al 2 o 3 composite oxide, add 20ml Zn(OAc) 2 solution (1.23mol / L), impregnated and adsorbed at room temperature for 3h, dried at 110°C for 10h, and roasted in a static air atmosphere at 400°C for 2h to obtain CuO-CuAl-containing 2 o 4 / Al 2 o 3...

Embodiment 3

[0041] Accurately weigh 12.0856g Cu(NO 3 ) 2 ·3H 2 O and 37.5152g Al(NO 3 ) 3 9H 2 O prepared into 400ml mixed salt solution (Cu 2+ :Al 3+ =1:2) and 31.7802g Na 2 CO 3 Dissolve in 500ml of deionized water; use the co-current co-precipitation method, control the temperature of the water bath at 80°C, and mechanically stir, the pH of the reaction system is 7.0. After the salt solution was added dropwise, the reaction was continued for 4 h under stirring conditions. Naturally cooled, the precipitate was centrifuged, washed, dried at 110°C for 10h, and roasted in a static air atmosphere at 650°C for 2h to obtain CuO-CuAl-containing 2 o 4 / Al 2 o 3 of composite oxides.

[0042] Weigh 8g containing CuO-CuAl 2 o 4 / Al 2 o 3 composite oxide, add 25ml Zn(OAc) 2 solution (1.31mol / L), impregnated and adsorbed at room temperature for 3h, dried at 110°C for 10h, and roasted in a static air atmosphere at 450°C for 3h to obtain CuO-CuAl-containing 2 o 4 / Al 2 o 3 -ZnO t...

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Abstract

The invention relates to a Cu-based catalyst for water-gas shift reaction and a preparation method thereof. The method first adopts the co-precipitation method, mixes copper salt and aluminum salt solution with alkali solution, and obtains CuO-CuAl containing CuO-CuAl through aging, cooling, centrifugation, washing, drying and roasting 2 o 4 / Al 2 o 3 The composite oxide; then the composite oxide is dispersed in a certain concentration of Zn salt solution, impregnated with equal volume, and then centrifuged, washed, dried, and roasted to obtain CuO-CuAl 2 o 4 / Al 2 o 3 ‑ZnO catalyst. The prepared catalyst has stable structure and performance, has high activity to the water-gas shift reaction, and is suitable for the water-gas shift reaction using natural gas, light oil, etc. as low-sulfur raw materials in the hydrogen production process.

Description

technical field [0001] The present invention relates to a kind of preparation method of water gas shift reaction catalyst, relate in particular to a kind of preparation method of Cu-based water gas shift reaction catalyst. Background technique [0002] With the increasingly prominent energy and environmental issues, it is imminent to upgrade the quality of gasoline and diesel oil products and develop and utilize clean energy. Hydrogen has a wide range of sources and is clean and environmentally friendly. It is an extremely superior energy carrier and has attracted widespread attention from all over the world. At present, the methods available for large-scale hydrogen production in the world are mainly hydrogen production by electrolysis of water and hydrogen production by fossil energy. Hydrogen production by electrolysis of water consumes a lot of energy, and the cost of hydrogen production is relatively high; coal gasification and natural gas reforming processes are mainl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80B01J37/03B01J37/08B01J37/02C10L3/10C10G45/04
Inventor 苑慧敏林性贻褚洪岭陈崇启李方伟詹瑛瑛张永军马丽娜刘玉香李文鹏徐艳王凤荣裴皓天徐显明汲永钢刘剑代跃利杜海林如海张志翔张忠涛李玉龙
Owner PETROCHINA CO LTD
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