Catalyst for degrading water organic pollutant by microwave

A technology of organic pollutants and microwave degradation, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, magnetic field/electric field water/sewage treatment, etc., can solve problems such as energy waste and achieve catalytic The effect of high activity, improved wave absorption performance and catalytic degradation performance

Inactive Publication Date: 2006-05-03
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Utilizing the characteristic of microwave selective heating, make the catalyst or carrier absorb microwave energy to degrade organic pollutants as much as possible, instead of being absorbed by water molecules, resulting in energy waste

Method used

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  • Catalyst for degrading water organic pollutant by microwave
  • Catalyst for degrading water organic pollutant by microwave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Accurately dissolve 0.05 mole of citric acid in 50ml of deionized water. After the citric acid is dissolved, slowly add 0.002 mole of barium nitrate and 0.02 mole of ferric nitrate while stirring. It fully undergoes a coordination reaction with citric acid, then adds 0.2 moles of ethylene glycol, and heats at 130°C for 2 hours to promote the esterification reaction of citric acid and ethylene glycol to form a gel polymer. The gel polymer is placed in a vacuum state, the heating rate is 2-5°C / min, the temperature is raised to 300°C, and the holding time is 2-5 hours, and the powdery precursor is generated by pyrolysis; then heat treatment is carried out at 800°C, A foam material composited with barium ferrite and pyrolytic carbon was obtained, and catalyst 1 of the present invention was obtained.

[0030] The barium ferrite X-ray diffraction spectrogram obtained above is shown in figure 1 . Depend on figure 1 It can be seen that in the XRD pattern of the sample, there...

Embodiment 2

[0033] Accurately dissolve 0.06 mole of citric acid in 50ml of deionized water. After the citric acid is dissolved, slowly add 0.002 mole of barium nitrate and 0.028 mole of ferric nitrate while stirring, and at the same time add 0.01 mole of nickel oxide with an average particle size of 1.0 μm. The temperature is controlled at Between 40°C and 70°C, continue heating for 5 hours to make it fully coordinate with citric acid, then add 0.24 moles of ethylene glycol, and heat at 140°C for 2 hours to promote esterification of citric acid and ethylene glycol reaction to form a gel polymer, which is pyrolyzed at 400°C under the protection of nitrogen to form a powder precursor, and then heat-treated at 900°C to obtain a composite of barium ferrite and pyrolytic carbon The foamed material obtained catalyst 2 of the present invention.

Embodiment 3

[0035]Accurately dissolve 0.04 mole of citric acid in 50ml of deionized water. After the citric acid is dissolved, slowly add 0.002 mole of barium nitrate and 0.024 mole of ferric nitrate while stirring, and at the same time add 0.05 mole of SiC with an average particle size of 50 μm and 0.001 mole of cobalt sulfate , the temperature is controlled between 70°C and 90°C, and the heating is continued for 3 hours to make it fully coordinate with citric acid, then add 0.16 moles of ethylene glycol, and heat at 130°C for 2 hours to promote citric acid and ethylene glycol Alcohol undergoes an esterification reaction to form a polymer. In a vacuum state, the polymer is pyrolyzed at 300°C to form a powder precursor, and then heat-treated at 700°C to obtain a composite of barium ferrite and pyrolytic carbon. The foamed material obtained catalyst 3 of the present invention.

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Abstract

The invention belongs to the technique for preparing the catalyst of sewage treatment, especially relating to a catalyst which can degrade the organic pollutant via microwave. The preparing method comprises: compounding the soluble barium and ferric salt with the gel polymer ligand in the network structure; arranging the leading body of gel polymer in the vacuum or protective atmosphere furnace to be thermal dissociated in the 200-500 Deg. C to attain the powder leading body; thermal processing it in 600-1000 Deg. C to attain the foamed material compounded with barium ferrite and pyrolysis carbon. The inventive catalyst uses the foamed material as carrier which has stronger ability to absorb organic pollutant with high catalytic activity. And said preparing method is simple and easy while the prepared catalyst has better property.

Description

(1) Technical field [0001] The invention belongs to the technical field of catalyst preparation for sewage treatment, in particular to a catalyst for degrading organic pollutants in sewage through microwaves. (2) Background technology [0002] With the development of society, the types and quantities of chemical pollutants in water are increasing day by day, many of which are toxic organic pollutants that are difficult to biodegrade. They can directly enter the environment through traditional biochemical treatment units, causing persistent pollution and hazards. For this reason, many methods have been proposed to deal with such pollutants, such as photocatalytic oxidation, wet oxidation, and sonochemical methods. These methods have their own advantages, but all have shortcomings, which limit the promotion and application of these methods. [0003] Microwaves are electromagnetic waves with a frequency of 300 MHz to 300 GHz. As an efficient heating method, microwaves can not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78C02F1/48
Inventor 国伟林王西奎
Owner UNIV OF JINAN
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