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Method for increasing the activity of copper-based catalyst in water-gas shift reaction

A copper-based catalyst, a technology for shift reaction, applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc.

Inactive Publication Date: 2009-12-23
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the condition that the composition of catalyst elements remains unchanged, efforts to improve the activity of copper-based catalysts are basically centered on the optimization of process parameters in the preparation process, and other activation methods other than the above-mentioned operations have not been proposed so far.

Method used

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  • Method for increasing the activity of copper-based catalyst in water-gas shift reaction
  • Method for increasing the activity of copper-based catalyst in water-gas shift reaction
  • Method for increasing the activity of copper-based catalyst in water-gas shift reaction

Examples

Experimental program
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Effect test

preparation Embodiment 1～4

[0010] Add 6 grams of Cu(NO 3 ) 2 ·3H 2 O, 4.4 grams of Zn (NO 3 ) 2 ·6H 2 O, 28 grams of Al(NO 3 ) 3 ·9H 2 O and 19 grams of Mg(NO 3 ) 2 ·6H 2 O is dissolved in water to form a mixed solution of metal ions, 22 grams of Na 2 CO 3 Dissolve in water to obtain precipitant solution. Water bath at 60℃, stirring, while adding dropwise the metal ion and precipitant solution to mix the two together for co-precipitation. After the dripping is over, it is aged for 2 hours. The precipitate thus obtained needs to be washed to remove impurity ions, dried at 120°C overnight, and then calcined at 450, 500, 600, and 700°C for 4 hours to obtain catalyst examples 1 to 4, respectively.

preparation Embodiment 5

[0012] 3g Cu(NO 3 ) 2 ·3H 2 O, 17 grams of Al (NO 3 ) 3 ·9H 2 O and 12 grams of Mg(NO 3 ) 2 ·6H 2 O is dissolved in water to form a mixed solution of metal ions, 12 grams of Na 2 CO 3 Dissolve in water to obtain precipitant solution. Water bath at 60℃, stirring, while adding dropwise the metal ion and precipitant solution to mix the two together for co-precipitation. After the dripping is over, it is aged for 2 hours. The precipitate thus obtained also needs to be washed to remove impurity ions, dried at 120°C overnight, and then calcined at 600°C for 4 hours to obtain Catalyst Example 5.

preparation Embodiment 6

[0014] Add 8 grams of Cu(NO 3 ) 2 ·3H 2 O, 6.4 grams of Zn (NO 3 ) 2 ·6H 2 O, 5.4 grams of Al(NO 3 ) 3 ·9H 2 O is dissolved in water to form a mixed solution of metal ions, 8 grams of Na 2 CO 3 Dissolve in water to obtain precipitant solution. 70℃ water bath, stirring, while adding dropwise the metal ion and precipitant solution to mix the two together and co-precipitate. After the dripping is over, it is aged for 1 hour. The precipitate thus obtained needs to be washed to remove impurity ions, dried at 120°C overnight, and then calcined at 450°C for 4 hours to obtain Catalyst Example 6.

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Abstract

The invention belongs to the inorganic chemical industry technical field, in particular to a method for increasing the activity of copper-based catalyst in water-gas shift reaction, comprising the following steps: after the reduction of the copper-based catalyst or reducing the copper-based catalyst for a period of time, lowering the temperature of catalyst bed to less than 100 DEG C under a water-bearing gas atmosphere and keeping temperature for a period of time, and then heating the temperature of catalyst bed to more than 100 DEG C to reach the aim of increasing the activity of catalyst. The reactivation process can be processed in in-situ reactions. The invention has a good application prospect in fuel cell system.

Description

Technical field [0001] The invention belongs to the technical field of inorganic chemicals, and relates to a novel method for improving the activity of a copper-based catalyst, and specifically relates to a copper-based water gas shift catalyst and its application in a fuel cell system. Background technique [0002] The catalyst must be properly treated before it is used in a certain reaction in order to have catalytic activity. For example, for the oxidation reaction, it may be necessary to calcinate the precursor to obtain the active component in the oxidized state; for the hydrogenation reaction, the active component is the metal component after reduction. Specifically, for the copper-based catalyst used in the water gas shift reaction, before it is used in the reaction, it usually needs to go through the following processes to obtain a catalyst with catalytic activity: (1) Using a co-precipitation method to obtain a precipitation precursor; (2) The precipitated precursor afte...

Claims

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Application Information

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IPC IPC(8): B01J23/94B01J38/04H01M4/90
CPCY02E60/50
Inventor 乔明华郭平均刘晓钰范康年
Owner FUDAN UNIV
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