Catalyst for treating sewage through electrocatalytic oxidation and preparation method thereof

A technology of electrocatalytic oxidation and catalyst, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of poor treatment effect, industrial application limitation, current efficiency Low problems, to achieve good catalytic oxidation capacity, short cycle, reduce chemical oxygen demand effect

Active Publication Date: 2021-06-04
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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PUM

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Abstract

The invention provides a catalyst for treating sewage through electrocatalytic oxidation. The catalyst takes one or more of manganese oxide, cerium oxide, iron oxide, cobalt oxide and copper oxide as active components and carbon as a matrix, has the specific surface area of 500-1500m < 2 >/g and the pore volume of 0.46-0.93 cm < 3 >/g, has good catalytic oxidation capacity, and can reduce chemical oxygen demand in the sewage quickly and effectively. The preparation method provided by the invention comprises the following steps: firstly, taking a precursor, mixing the precursor with the anthracite duff and the tar, airing to enable active substances in the precursor to be in full contact with the anthracite duff and the tar, then performing high-temperature calcination in a non-oxidizing atmosphere, generating a large amount of gas in the calcination process to enable a part of metal to be reduced, and making the catalyst generate a large number of pore channels in the escape process. The preparation method provided by the invention is simple to operate, short in period, free of wastewater and environment-friendly.

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 Applications(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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