Double-effect catalyst capable of regulating ozone and hydrogen peroxide decomposition rate and preparation method and application thereof

A decomposition rate, hydrogen peroxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of avoiding decomposition, reducing oxidation decomposition rate, and simple preparation method

Active Publication Date: 2019-03-15
华瑞创源(北京)环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, usually the content of ozone produced by the ozone generator does not exceed 10%, and the remaining high-purity oxygen of about 90% is directly discharged into the atmosphere, which is a pity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. A preparation of a dual-effect catalyst capable of regulating the decomposition rate of ozone and hydrogen peroxide, comprising the steps of:

[0026] (1) The gamma-alumina of loading manganese oxide must be prepared:

[0027] Use gamma-alumina pellets with a diameter of 3-5 mm as the catalyst carrier, wash them with water three times, dry them at 120°C for 2 hours, soak them in 1mol / L manganese nitrate solution for 24 hours, and dry them in an oven at 120°C Prepared for 2 hours, then calcined at 400°C for 4 hours to obtain γ-alumina pellets loaded with manganese oxide.

[0028] (2) Preparation of aluminum hydroxide slurry: dissolve aluminum hydroxide powder in a solvent, the solvent is water and ethanol, the volume ratio of ethanol and water is 1:1, and the content of aluminum hydroxide is 10wt%;

[0029] (3) Preparation of mixed slurry:

[0030] Mix iron oxyhydroxide powder and aluminum hydroxide slurry evenly, control the content of iron element to 6wt%, and mak...

Embodiment 2

[0037] 1. A preparation of a dual-effect catalyst capable of regulating the decomposition rate of ozone and hydrogen peroxide, comprising the steps of:

[0038] (1) Preparation of β-alumina loaded with manganese oxide:

[0039] Choose β-alumina pellets with a diameter of 3-5mm as the catalyst carrier, wash them twice with water, dry them at 120°C for 2 hours, soak them in 1mol / L manganese acetate solution for 24 hours, and dry them in an oven at 120°C Prepared for 2 hours, then calcined at 400°C for 4 hours to obtain β-alumina pellets loaded with manganese oxide.

[0040] (2) Preparation of aluminum hydroxide slurry:

[0041] The aluminum hydroxide powder is dissolved in a solvent, the solvent is water and ethanol, the volume ratio of ethanol and water is 1:2, and the content of aluminum hydroxide is 15wt%;

[0042] (3) Preparation of mixed slurry:

[0043] Mix iron oxyhydroxide powder and aluminum hydroxide slurry evenly, control the content of iron element to 6wt%, and ma...

Embodiment 3

[0050] 1. A preparation of a dual-effect catalyst capable of regulating the decomposition rate of ozone and hydrogen peroxide, comprising the steps of:

[0051] (1) Preparation of α-alumina loaded with manganese oxide:

[0052] Select α-alumina pellets with a diameter of 3-5mm as the catalyst carrier, wash them twice with water, dry them at 120°C for 2 hours, soak them in 1mol / L manganese acetate solution for 24 hours, and dry them in an oven at 120°C Prepared for 2 hours, then calcined at 400°C for 4 hours to obtain α-alumina pellets loaded with manganese oxide;

[0053] (2) Preparation of aluminum hydroxide slurry: dissolve aluminum hydroxide powder in a solvent, the solvent is water and ethanol, the volume ratio of ethanol and water is 1:3, and the content of aluminum hydroxide is 25wt%;

[0054] (3) Preparation of mixed slurry:

[0055] Mix iron oxyhydroxide powder and aluminum hydroxide slurry evenly, control the content of iron element to 6wt%, and make a mixed slurry,...

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Abstract

The invention discloses a double-effect catalyst capable of regulating ozone and hydrogen peroxide decomposition rate. The catalyst is a core-shell structure, the core is manganese-loaded alumina andthe shell is iron oxyhydroxid-loaded alumina, wherein the manganese-loaded alumina has a manganese element content of 5-10wt%, the iron oxyhydroxid-loaded alumina has an iron element content of 5-10wt%, and the mass ratio of the manganese-loaded alumina to the iron oxyhydroxide-loaded alumina is 10: 1 to 1: 1. The preparation method of the catalyst is simple, and is capable of realizing large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and specifically relates to a double-effect catalyst capable of regulating the decomposition rate of ozone and hydrogen peroxide, its preparation method and application. Background technique [0002] Advanced oxidation technology has become the main means of treating refractory wastewater due to its strong oxidation capacity, high pollutant removal rate and stable process operation. Among them, ozone catalytic oxidation technology, as an efficient, practical, and non-secondary pollution advanced oxidation technology, has been applied engineeringly in the treatment of refractory wastewater. [0003] With the improvement of emission standards, the single ozone catalytic oxidation technology has encountered a bottleneck. After a lot of wastewater is treated with ozone catalytic oxidation, the chemical oxygen demand (COD) still cannot meet the emission standards. Therefore, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889C02F1/72C02F1/78
CPCB01J23/8892C02F1/722C02F1/725C02F1/78C02F2305/026
Inventor 李海涛韩小刚刘艳尼
Owner 华瑞创源(北京)环保科技有限公司
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