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Preparation method of cuprum cerium composite oxides catalyst

A technology of composite oxides and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low reaction activity, long time-consuming, cumbersome catalyst process and other problems to achieve the effect of overcoming the cumbersome process

Inactive Publication Date: 2009-03-18
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the cumbersome and time-consuming process of preparing copper-cerium composite oxide catalysts in the prior art, and the shortcomings of the low-temperature oxidation reaction activity of the catalysts for CO, and to provide a citric acid complexing catalyst with a simple preparation process. Method for preparing copper-cerium composite oxide catalyst

Method used

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  • Preparation method of cuprum cerium composite oxides catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 2.42 grams of copper nitrate and 39.1 grams of cerium nitrate were dissolved in 100 milliliters of ethanol, then 2.3 grams of citric acid were added and stirred to completely dissolve. Heating in a water bath at 80°C and stirring continuously until a sol is produced, and quickly transferring it to a large container previously heated at 120°C, the sol foams rapidly to form a fluffy and porous gel precursor. After drying for 2 h, calcining at 650 °C for 4 h in a muffle furnace to obtain CuO / CeO 2 Catalyst A.

Embodiment 2

[0025] Prepare CuO / CeO with embodiment 1 2 Catalysts B and C just replace ethanol with propanol and butanol, respectively.

Embodiment 3

[0027] Prepare CuO / CeO with embodiment 1 2 Catalysts D and E, but the addition of citric acid is respectively 1.54 grams and 3.46 grams.

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Abstract

The invention discloses a method used for preparing Cu-Se composite oxide catalyst by a citric acid complex method, comprising the steps as follows: a. copper salt and Se salt are added in anhydrous alcohol solution; b. the citric acid is added in the mixed solution and mixed so as to be completely dissolved, and heated and continuously mixed till sol is generated; wherein, the molar quantity of the added citric acid is 0.5-5 times of the molar quantity of the Cu-Se; C. after the sol is heated, the sol is foamed rapidly to form loose and porous gel which is dried subsequently and roasted in a muffle furnace under the temperature of 300-900 DEG C, thus gaining the Cu-Se composite oxide catalyst. The method has simple preparation process; furthermore, the prepared CuO / CeO2 catalyst has extremely high catalytic activation on CO oxidation reaction.

Description

technical field [0001] The present invention relates to a kind of preparation method of composite oxide catalyst, relate to a kind of CuO / CeO more specifically 2 Preparation method of composite oxide catalyst. Background technique [0002] CuO / CeO 2 Catalysts are widely used in low-temperature oxidation and selective oxidation of carbon monoxide, hydrogen production by steam reforming of alcohols, catalytic reduction of nitrogen oxides, water vapor shift reaction, decomposition of hydrogen peroxide, catalytic combustion of methane, and wet oxidation of phenol. CuO / CeO 2 The reactivity of the catalyst is not only related to its composition, but also closely related to the preparation method of the catalyst. Currently, the preparation of CuO / CeO 2 There are two main methods of catalyst, namely impregnation method and co-precipitation method. [0003] The preparation of the copper-cerium composite oxide catalyst by the impregnation method is carried out in two steps. First...

Claims

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Application Information

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IPC IPC(8): B01J23/83
Inventor 毛东森陶丽华卢冠忠郭杨龙
Owner SHANGHAI INST OF TECH
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