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Magnetic separation type catalytic device for eliminating hydrogen peroxide and application thereof

A hydrogen peroxide, magnetic separation technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, oxidized water/sewage treatment, etc., can solve problems such as increased operating costs and low catalytic activity , to improve the efficiency, the preparation process is simple, and the reaction rate is accelerated.

Active Publication Date: 2018-10-02
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst commonly used in the prior art to eliminate hydrogen peroxide by catalytic decomposition is MnO 2 , which has the defect of low catalytic activity, and after the reaction is completed, it needs to be filtered to separate the water sample from the catalyst, which increases the operating cost

Method used

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  • Magnetic separation type catalytic device for eliminating hydrogen peroxide and application thereof
  • Magnetic separation type catalytic device for eliminating hydrogen peroxide and application thereof
  • Magnetic separation type catalytic device for eliminating hydrogen peroxide and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Embodiment 1 of the present invention discloses a magnetic catalytic material for eliminating hydrogen peroxide. The magnetic catalytic material is composed of perovskite oxides, and the structural formula of the perovskite oxides is ABO 3 ; A-position cations include one or more of rare earth metal ions or alkaline earth metal ions; B-position cations include one or more of transition metal ions.

[0044] In order to further optimize the technical solution, the perovskite oxide is La 1-x Sr x MnO 3 , x satisfies 01-x Sr x MnO 3 The specific surface area is less than 10mg L -1 .

[0045] In order to further optimize the technical solution, La 1-x Sr x MnO 3 In the preparation process, the sol-gel method is used to prepare the precursor, and then it is calcined in a muffle furnace at a high temperature of 900°C.

[0046] In order to further optimize the technical solution, a magnetic catalytic material for eliminating hydrogen peroxide includes La 0.4 Sr 0.6 M...

Embodiment 2

[0057] The embodiment of the invention also discloses a magnetic separation catalytic device for eliminating hydrogen peroxide, which includes a baffle, a decomposition tube and a tile-shaped magnet; a magnet is installed inside the baffle, and one side of the baffle is connected to the side of the decomposition tube. Bottom: The interior of the decomposition tube is filled with a magnetic catalytic material for eliminating hydrogen peroxide, and the decomposition tube is covered with tile-shaped magnets.

[0058] In order to further optimize the technical solution, a cooling pipe is also included. The bottom end of the cooling pipe is a closed structure, the top of the cooling pipe is connected to the other side of the baffle, and cooling water is installed in the cooling pipe.

[0059] In order to further optimize the technical solution, it also includes a pipe plug and a filter tube, the pipe plug is mated with the top of the decomposition tube, and the filter tube is passed...

Embodiment 3

[0062] The embodiment of the present invention also discloses a method for assembling a magnetic separation catalytic device for eliminating hydrogen peroxide, which specifically includes the following steps:

[0063] (1) Granulation of the magnetic catalytic material: the magnetic catalytic material in Example 1 is placed in a tableting mold, pressed under 15-25M unidirectional pressure for 2min into a sheet, and then the sheet is placed on a 30-60 mesh screen Medium grinding and granulation, collecting the particles left in the sieve, and pressing them into particles with a particle size larger than 30-60 mesh;

[0064] (2) Assembling the magnetic separation catalytic device: first fill the inside of the cooling tube with cooling water, then connect the top of the cooling tube to one side of the baffle with a magnet installed inside, and then connect the bottom of the decomposition tube to the other side of the baffle Connect, and finally bond the tile-shaped magnet to the o...

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Abstract

The invention discloses a magnetic catalytic material La1-xSrxMnO3 for eliminating hydrogen peroxide, wherein the magnetic catalytic material not only has excellent catalytic effect, but also can be used for high-efficiency catalytic degradation of hydrogen peroxide, has excellent ferromagnetism, facilitates rapid separation of a catalyst and a product, and improves the efficiency of catalytic degradation of hydrogen peroxide. At the same time, the invention discloses a magnetic separation type catalytic device for eliminating hydrogen peroxide, wherein the magnetic separation type catalytic device comprises a baffle, a decomposition tube and a tile type magnet; magnetic perovskite oxide La1-xSrxMnO3 (0<x<=0.6) is evenly dispersed in the decomposition tube surrounded by the magnet, so thata to-be-tested water sample containing residual hydrogen peroxide makes uniform contact with a catalyst to accelerate the decomposition reaction rate of the residual hydrogen peroxide in the water sample; moreover, the magnet can separate the water sample from the catalyst rapidly, so the step of catalyst filtration is omitted and the time and cost are saved.

Description

technical field [0001] The invention belongs to the field of environmental monitoring, and relates to a measurement technology and a device for accurately measuring indicators related to wastewater treatment, specifically, a magnetic separation catalytic device for eliminating hydrogen peroxide and its application. Background technique [0002] In the technical field of organic wastewater treatment, based on H 2 o 2 The Fenton technology and Fenton-like technology are widely used advanced oxidation technologies. This type of advanced oxidation technology is characterized by the H 2 o 2 as the oxidizing agent, in Fe 2+ / Fe 3+ Under the catalysis of heterogeneous catalysts and other heterogeneous catalysts, free radicals OH with high redox potential are generated, which can efficiently degrade various organic pollutants. It is a green and sustainable water treatment technology. In addition, chemical oxygen demand (COD) is an important parameter to evaluate the treatment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J35/00B01J35/10C02F1/72C02F101/10
CPCC02F1/725B01J23/002B01J23/34C02F2101/10B01J2523/00B01J35/612B01J35/39B01J2523/3706B01J2523/72B01J2523/24
Inventor 周嵬苗洁李将戴洁邵宗平
Owner NANJING UNIV OF TECH
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