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A kind of ozone catalytic oxidation catalyst modification method

An ozone catalytic oxidation and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of low catalytic efficiency and reduction, and achieve improved catalytic efficiency. Efficiency, simple operation steps, mild effect

Active Publication Date: 2019-08-02
CHINA TIANCHEN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the existing ozone catalytic oxidation catalysts based on alumina still have the problem of low catalytic efficiency in the advanced treatment of industrial wastewater. The reason is that the reduction of the number of hydroxyl groups on the surface of the carrier after loading active components is an important reason.

Method used

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  • A kind of ozone catalytic oxidation catalyst modification method
  • A kind of ozone catalytic oxidation catalyst modification method

Examples

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Effect test

Embodiment 1

[0028] The catalyst obtained in Comparative Example 1 was modified by ammonium nitrate solution with a mass fraction of 5%, impregnated according to catalyst:solution mass ratio = 1:3, treated at room temperature for 6 hours; washed after filtration, dried at 120°C for 15 hours, and calcined at 500°C for 4 hours , to obtain the modified catalyst.

Embodiment 2

[0030] The catalyst obtained in Comparative Example 1 was modified by ammonia water with a mass fraction of 5%, impregnated according to catalyst:solution mass ratio = 1:3, treated at room temperature for 6 hours; washed after filtration, dried at 120°C for 15 hours, and calcined at 500°C for 4 hours to obtain modified catalyst.

Embodiment 3

[0032] The catalyst obtained in Comparative Example 1 was modified by hydrogen peroxide with a mass fraction of 5%, impregnated according to catalyst:solution mass ratio = 1:3, treated at room temperature for 6 hours; washed after filtration, dried at 120°C for 15 hours, and calcined at 500°C for 4 hours to obtain modified catalyst.

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Abstract

The invention relates to modification treatment of a loaded catalytic ozonation catalyst after immersing and roasting processes (with certain catalytic activity) so as to further improve the catalytic activity. The method provided by the invention is characterized in that the quantity of surface hydroxyl groups of the modified catalyst is increased; and the removal efficiency of COD in wastewater can be increased if being used in a catalytic ozonation process.

Description

technical field [0001] The invention belongs to a modification method of an ozone catalytic oxidation catalyst, and is a catalyst suitable for application in the field of advanced wastewater treatment. Background technique [0002] Ozone is a strong oxidizing molecule and has been widely used in the fields of domestic water treatment and industrial water treatment. The introduction of catalyst makes ozone have a stronger oxidation ability, and ozone catalytic oxidation has become an important advanced treatment technology for industrial wastewater. [0003] Ozone catalytic oxidation technology is divided into homogeneous catalytic oxidation and heterogeneous catalytic oxidation. The catalyst added in the homogeneous catalytic oxidation is difficult to separate, and it is easy to cause secondary pollution of the water body. The catalyst used in the heterogeneous catalytic oxidation is a solid phase. Generally, a supported catalyst is used to decompose organic matter in wast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75C02F1/78
CPCB01J23/75C02F1/725C02F1/78
Inventor 陈晨刘文邢艳梅杨琦武谭中侠花绍龙田涛王子兴
Owner CHINA TIANCHEN ENG
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