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Method for preparing Cu-Co oxide catalyst

A technology for oxides and catalysts, applied in the field of preparing Cu-Co oxide catalysts, can solve the problems of lack of systematic research on the influence of Cu/Co ratio, and achieve the effects of excellent catalytic combustion degradation activity, easy operation and good stability

Inactive Publication Date: 2018-12-04
QIDONG XIANGRUI CONSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Co has been used in the research of degrading volatile organic compounds, there are few reports on Cu / Co composite oxide catalysts at home and abroad, and there is a lack of systematic research on the preparation of different precipitants and the influence of Cu / Co ratio.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of method for preparing Cu-Co oxide catalyst, comprises the steps: with 25 parts of Co(NO 3 ) 2 ·6H 2 O and 7 parts of Cu(NO 3 ) 2 ·3H 2 O was dissolved in 90 parts of deionized water; 8 parts of NH 4 OH, 7 parts (NH 4 ) 2 CO 3 , 12 Na 2 CO 3 Dissolve 3 parts of NaOH in 65 parts of deionized water as a precipitant, slowly add the precipitant to the nitrate solution dropwise while stirring at 30°C, adjust the pH to 8.5, filter after aging for 24 hours, and wash with deionized water 5 times, dried at 102° C. for 15 hours to obtain precursor powder, which was roasted in a muffle furnace at 490° C. for 6.5 hours, and then cooled; all raw materials are in parts by weight.

Embodiment 2

[0018] A kind of method for preparing Cu-Co oxide catalyst, comprises the steps: with 20 parts of Co(NO 3 ) 2 ·6H 2 O and 5 parts of Cu(NO 3 ) 2 ·3H 2 O was dissolved in 85 parts of deionized water; 7 parts of NH 4 OH, 5 parts (NH 4 ) 2 CO 3 , 10 parts of Na 2 CO 3 Dissolve 2 parts of NaOH in 60 parts of deionized water as a precipitant, slowly add the precipitant to the nitrate solution dropwise while stirring at 25°C, adjust the pH to 8, filter after aging for 23 hours, and wash with deionized water 4 times, dried at 100°C for 14 hours to obtain precursor powder, which was roasted in a muffle furnace at 485°C for 6 hours, and then cooled; all raw materials are in parts by weight.

Embodiment 3

[0020] A kind of method for preparing Cu-Co oxide catalyst, comprises the steps: with 30 parts of Co(NO 3 ) 2 ·6H 2 O and 10 parts of Cu(NO 3 ) 2 ·3H 2 O dissolved in 95 parts of deionized water; 9 parts of NH 4 OH, 10 parts (NH 4 ) 2 CO 3 , 14 Na 2 CO 3 Dissolve 4 parts of NaOH in 70 parts of deionized water as a precipitant. Slowly add the precipitant to the nitrate solution dropwise while stirring at 35°C, adjust the pH to 9, filter after aging for 25 hours, and wash with deionized water 6 times, drying at 105° C. for 16 hours to obtain precursor powder, which was roasted in a muffle furnace at 495° C. for 7 hours, and then cooled; all raw materials are in parts by weight.

[0021] The method is simple, fast and easy to operate. The prepared Cu / Co catalyst has excellent catalytic combustion degradation activity for n-heptane and good stability. The structure of the catalyst is stable before and after the reaction and there is no carbon deposition on the surface.

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PUM

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Abstract

The invention discloses a method for preparing a Cu-Co oxide catalyst. The method comprises the following steps: dissolving Co(NO3)2. 6H2O and Cu(NO3)2. 3H2O in deionized water; dissolving NH4OH, (NH4)2CO3, Na2CO3 and NaOH in deionized water to obtain a precipitant, slowly dropwise adding the precipitant to the above obtained nitrate solution at 25-35 DEG C while stirring, adjusting the pH value to 8-9, performing ageing for 23-25 h, filtering the obtained solution, washing the obtained material with deionized water 4-6 times, drying the washed material at 100-105 DEG C for 14-16 h to obtain aprecursor powder, calcining the precursor powder in a muffle furnace at 485-495 DEG C for 6-7 h, and cooling the calcined precursor powder to obtain the catalyst. The method has the advantages of simplicity, rapidness, and easiness in operation, and the prepared Cu / Co catalyst has the advantages of excellent catalytic combustion degradation activity for n-heptane, good stability, stable catalyststructure before and after a reaction, and no carbon deposit on the surface.

Description

technical field [0001] The invention relates to a method for preparing Cu-Co oxide catalyst. Background technique [0002] The excessive emission of volatile organic compounds (VOCs) in the industrial production process is considered to be one of the main air pollutants. It is not only toxic, but also causes photochemical smog, which is a serious hazard to human health. As one of the representatives of VOCs, n-heptane is widely used in industries such as hardware, electronics, printing and shoemaking. It will undergo free radical reactions in the atmosphere to generate alkyl nitrates and hydroxy alkyl ketones. This substance is one of the causes of photochemical smog. [0003] Catalytic combustion technology can completely degrade VOCs into carbon dioxide and water at a relatively low temperature, and is considered to be one of the efficient and environmentally friendly VOCs treatment technologies. Catalysts used in catalytic combustion mainly include: (1) noble metal cata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J37/03B01J37/08F23G7/07
CPCB01J23/75B01J23/002B01J37/031B01J37/082F23G7/07
Inventor 不公告发明人
Owner QIDONG XIANGRUI CONSTR CO LTD