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Device and method for degrading gaseous organic pollutants by electrochemical method

An organic pollutant, electrochemical technology, applied in chemical instruments and methods, separation methods, gas treatment and other directions, to achieve the effect of increased service life, excellent lasting stability, and a wide range of applications

Pending Publication Date: 2021-06-01
SHENZHEN PUREMATE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a device and method for electrochemically degrading gaseous organic pollutants, aiming to solve the problems existing in anode electrode materials in related technologies

Method used

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  • Device and method for degrading gaseous organic pollutants by electrochemical method
  • Device and method for degrading gaseous organic pollutants by electrochemical method
  • Device and method for degrading gaseous organic pollutants by electrochemical method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Preparation of the anode: Titanium oxide was loaded on a foamed titanium sheet with a filtration accuracy of 50 μm as the substrate. First put the titanium foam into acetone for ultrasonic degreasing and washing with water, then immerse in 10wt% oxalic acid solution at 90°C for 2 hours to remove the oxide layer on the titanium surface, and at the same time form a roughness of about 5 μm on the titanium surface; then put the treated foam titanium The sheet is fixed on the metal baffle, and the titanium dioxide is sprayed on the foamed titanium by plasma spraying method, the spraying power is 30KW, and the spraying thickness is controlled at about 20μm by adjusting the spraying amount. The sprayed titanium foam is washed with ethanol and then dried to obtain titanium foam supported by titanium oxide, which is used as an anode for subsequent gas-solid phase electrochemistry.

[0054] X-ray diffraction spectrum test is carried out on the anode surface coating, the test ...

Embodiment 2

[0058] Example 2: Influence of Intake Relative Humidity on Degradation Efficiency of Gaseous Organic Pollutants

[0059] Using the anode, cathode and assembled electrochemical reaction device in Example 1, the relative humidity of the intake air in the anode area is controlled from 40% to 90%, the concentration of benzene in the intake air is 10ppm, and the gas flow rate is 20mL / min. At the same time, the relative humidity of the air entering the cathode area was controlled to be consistent with that of the air entering the anode area, and the air flow rate was 20 mL / min. After 4 hours of continuous flow of gas on both sides, each component in the electrochemical reactor has reached the equilibrium state of water vapor adsorption, and then a 4V voltage is applied between the anode and the cathode to detect the degradation rate of benzene under steady flow electrolysis, and the results are as follows Figure 4 As shown, the degradation rate of benzene is over 90% under differen...

Embodiment 3

[0060] Embodiment 3: Stability test of electrochemical method for degrading gaseous organic pollutants

[0061] Using the anode, cathode and assembled electrochemical reaction device in Example 1, the gas (relative humidity is 60%) containing typical volatile organic pollutants-"benzene" is passed into the anode gas flow channel, and the concentration of benzene is 10ppm. The gas flow rate is 20mL / min. At the same time, air (relative humidity of 60%) was passed into the cathode air flow channel at a flow rate of 20 mL / min. Then apply a 4V voltage between the anode and the cathode, and monitor the concentration and current of benzene pollutants at the outlet of the anode airflow channel when it is stable. The relationship between the benzene degradation efficiency and current density and time under long-term continuous electrolysis is shown in Figure 5 . from Figure 5It can be seen that in the continuous degradation process of 60 hours, the degradation rate of benzene is m...

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Abstract

The invention discloses a device and method for degrading gaseous organic pollutants by an electrochemical method. The device for degrading the gaseous organic pollutants through the electrochemical method comprises an electrochemical reactor, the electrochemical reactor comprises a power source, an anode, a cathode, a proton exchange membrane, an anode airflow channel and a cathode airflow channel, the anode is arranged in the anode airflow channel, the cathode is arranged in the cathode airflow channel, the proton exchange membrane is arranged between the anode and the cathode, the anode, the proton exchange membrane and the cathode are arranged in a clamping manner, and a titanium black material coating is arranged on the surface of the anode. According to the technical scheme, gaseous organic pollutants can be efficiently degraded.

Description

technical field [0001] The invention relates to the technical field of purifying gaseous organic pollutants, in particular to a device and method for electrochemically degrading gaseous organic pollutants. Background technique [0002] At present, the degradation method for volatile gaseous organic pollutants usually adopts electrochemical oxidation method. This degradation method has attracted much attention because it does not need to add any chemical reagents, is easy to operate, and is environmentally friendly. The core technology of the electrochemical oxidation method is the anode electrocatalytic material. The anode electrode materials used in related technologies mainly include boron-doped diamond, lead oxide and tin oxide. However, these electrode materials often have the following problems: boron-doped diamond The cost is high and it is difficult to be widely used; it is often difficult to avoid the potential release of lead ions during the use of lead oxide electr...

Claims

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Application Information

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IPC IPC(8): B01D53/32
CPCB01D53/326B01D2257/7027B01D2257/708Y02A50/20C25B1/01C25B11/052C25B11/063C25B11/077C25B11/032C25B1/23C25B11/051C25B9/63C25B11/046
Inventor 张礼知贾法龙严义清严方升
Owner SHENZHEN PUREMATE TECH
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