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A kind of catalyst for electrocatalytic oxidation treatment of sewage and preparation method thereof

An electrocatalytic oxidation and catalyst technology, which is applied in the directions of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., which can solve industrial application limitations, poor treatment effects, and current efficiency. Low problems, to achieve the effect of short cycle, good catalytic oxidation ability, and reduction of chemical oxygen demand

Active Publication Date: 2022-03-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the industrial application of electrochemical oxidation technology is limited due to the influence of electrode materials and high energy consumption.
Therefore, electrocatalytic oxidation technology emerged as the times require, but the existing electrocatalytic oxidation technology has technical problems such as low current efficiency and poor treatment effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A catalyst for electrocatalytic oxidation treatment of sewage, the preparation method of which comprises the following steps:

[0036] (1) take by weighing 30g manganese nitrate, 18g cerium nitrate, 10g cobalt nitrate as precursor;

[0037] (2) Mix the precursor with 350g of anthracite coal powder, then add 60g of tar, mix well, and let it dry naturally for 24 hours to obtain the mixture;

[0038] (3) the mixture obtained in step (2) in CO 2 Calcining under the atmosphere, the calcining temperature is 850° C., calcining for 4 hours, and cooling to obtain the catalyst for electrocatalytic oxidation treatment of sewage.

Embodiment 2

[0040] A catalyst for electrocatalytic oxidation treatment of sewage, the preparation method of which comprises the following steps:

[0041] (1) take by weighing 70g manganese nitrate, 30g cerium nitrate, 15g cerium acetate, 20g ferric nitrate as precursor;

[0042] (2) Mix the precursor with 350g of anthracite coal powder, then add 30g of tar, mix well, and let it dry naturally for 24 hours to obtain the mixture;

[0043] (3) the mixture obtained in step (2) in CO 2 Calcining under the atmosphere, the calcining temperature is 800° C., calcining for 10 hours, and cooling to obtain the catalyst for electrocatalytic oxidation treatment of sewage.

Embodiment 3

[0045] A catalyst for electrocatalytic oxidation treatment of sewage, the preparation method of which comprises the following steps:

[0046] (1) take by weighing 50g manganese nitrate, 40g copper nitrate, 12g cerium nitrate as precursor;

[0047] (2) Mix the precursor with 350g of anthracite coal powder, then add 30g of tar, mix well, and let it dry naturally for 24 hours to obtain the mixture;

[0048] (3) the mixture that step (2) obtains is in N 2 Calcining under the atmosphere, the calcining temperature is 800° C., calcining for 10 hours, and cooling to obtain the catalyst for electrocatalytic oxidation treatment of sewage.

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Abstract

The invention provides a catalyst for electrocatalytic oxidation treatment of sewage, comprising one or more of manganese oxides, cerium oxides, iron oxides, cobalt oxides, and copper oxides as active components , with carbon as the matrix, its specific surface area is 500‑1500m 2 / g, the pore volume is 0.46‑0.93cm 3 / g, has good catalytic oxidation ability, and can quickly and effectively reduce the chemical oxygen demand in sewage. In the preparation method provided by the present invention, first take the precursor, mix the precursor with anthracite powder and tar, and dry it in the air so that the active material in the precursor fully contacts with the anthracite powder and tar, and then calcines at high temperature in a non-oxidizing atmosphere. A large amount of gas will be generated during the process, so that part of the metal is reduced, and the gas will make the catalyst generate a large number of pores during the escape process. The preparation method provided by the invention has the advantages of simple operation, short period, no waste water generation and environmental friendliness.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a catalyst for electrocatalytic oxidation treatment of sewage and a preparation method thereof. Background technique [0002] One of the important sources of water pollution is industrial wastewater. Due to its different properties and complex components, industrial wastewater is difficult to treat and brings a serious burden to the environment. The electrochemical oxidation method is to produce intermediate substances with strong oxidizing effect through anodic oxidation or anodic reaction, or to undergo intermediate reactions other than anodic reaction, so as to oxidize the pollutants to be treated, and finally achieve the purpose of oxidative degradation of pollutants. Compared with conventional methods (biochemical method, Fenton method, photocatalysis, wet oxidation), the electrochemical oxidation method has mild reaction conditions (normal temperature, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J35/00B01J35/10C02F1/461
CPCB01J23/8892B01J35/0033B01J35/1023B01J35/1028B01J35/1042B01J35/1038C02F1/46109C02F2001/46142
Inventor 王保伟
Owner TIANJIN UNIV
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