Preparation method for ozone catalytic oxidation catalyst and device using catalyst

An ozone catalytic oxidation and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low utilization rate of devices, long reaction time and increased cost and other problems, to achieve the effect of good removal, shortened processing cycle and stable performance

Active Publication Date: 2011-06-15
GUANGDONG UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For a reaction, if the mass transfer is too slow, the reaction time will be relatively long, and the cost of industrial application will i...

Method used

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  • Preparation method for ozone catalytic oxidation catalyst and device using catalyst
  • Preparation method for ozone catalytic oxidation catalyst and device using catalyst
  • Preparation method for ozone catalytic oxidation catalyst and device using catalyst

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Embodiment 1

[0021] Fe in this embodiment 2 o 3 The preparation method of supported catalyst is as follows: take gac as carrier, prepare ferric chloride solution by 3wt% load, add pyrophosphate of 0.2wt‰, gac is soaked in this solution for 8 hours, add 1wt% alkali to continue soaking 8 hours, dried at 105° C. for 6 hours, then washed and dried, placed in a muffle furnace at 400° C. for 2 hours and calcined to obtain a solid catalyst.

Embodiment 2

[0023] The preparation method of the Fe-Mn supported catalyst of the present embodiment is as follows: use activated carbon as a carrier, prepare a mixed solution with a Fe:Mn molar ratio of 1:1 by 3wt% load, add 0.2wt‰ potassium pyrophosphate, impregnate the activated carbon Soak in the solution for 8 hours, add 1% alkali and continue soaking for 8 hours, dry at 105°C for 6 hours, then wash and dry, and place in a muffle furnace for calcination at 400°C for 2 hours to obtain a solid catalyst.

Embodiment 3

[0025] In this implementation, the activated carbon loaded with iron-manganese composite oxide obtained in Example 2 was used as a catalyst for ozone catalytic oxidation treatment of disperse dye wastewater. The COD removal rate of the catalyst prepared by roasting at 400°C is 72.02%, and the effluent is colorless and odorless, which can meet the discharge standard of industrial water treatment.

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Abstract

The invention discloses a preparation method for an ozone catalytic oxidation catalyst and a device using the catalyst. The preparation method comprises the processes of adsorbing and precipitating an active component by active carbon and drying, washing and roasting; the active carbon adopts an adsorption-precipitation method on the active component; and saturated ferric chloride and manganous nitrate active components and a solution formed by compounding the saturated ferric chloride and manganous nitrate active components are adsorbed by pore channels inside the active carbon, and a proper amount of alkali is added to form hydroxide sediments. The method overcomes the defect of releasing a great quantity of nitric oxide pollutants into environment in the roasting process by a chloride or nitrate soaking method and prevents the condition that the active component is just deposited on the surface of the active carbon in the traditional one-step precipitating method; and an air chamber of the device using the catalyst separately carries out gas inlet and water discharge, and the invention follows the advantages of a reverse-flow type fixed bed, improves the utilization ratio of catalyst on the basis of ensuring gas-liquid-solid efficient mass transfer, has uniform gas dispersion and realizes the industrialized application of an ozone catalytic oxidation treatment technology.

Description

technical field [0001] The invention relates to a preparation method of a loaded metal oxide activated carbon catalyst for ozone catalytic oxidation of printing and dyeing wastewater and a device using the catalyst. Using loaded activated carbon as a catalyst for ozone oxidation can improve the oxidation of ozone to refractory organic substances in wastewater Effect. Background technique [0002] Ozone is a strong oxidant, but its oxidizing property is selective, and it cannot oxidize all pollutants to achieve the purpose of completely eliminating pollutants, so the application of simple ozone oxidation of organic matter has great limitations. In recent years, faced with the increasing occurrence of refractory organic matter, the advanced oxidation technology combining ozone and other water treatment technologies has emerged as the times require. Metal oxide catalyzed ozone degradation of organic matter is a new technology developed in recent years, using ozone under the ca...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J23/889B01J23/34C02F1/78
Inventor 潘湛昌黄石峰徐阁吴惠明肖楚民徐慎颖魏志钢胡光辉陈世荣
Owner GUANGDONG UNIV OF TECH
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