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Surrounding radiation type electro-catalytic device

An electrocatalysis and power system technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of refractory degradation, low electrode utilization rate, etc. Effective long-lasting effect

Inactive Publication Date: 2020-03-27
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In general, electrocatalytic technology has a very broad application prospect in removing halogenated solvents, but traditional electrocatalytic technology is limited by fixed cathode and anode installation methods, electrode area and other conditions, and there are problems such as low electrode utilization and difficulty in complete degradation. , needs to be optimized and improved on the existing basis

Method used

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  • Surrounding radiation type electro-catalytic device
  • Surrounding radiation type electro-catalytic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Turn on the power, and carry out electrocatalytic treatment on the groundwater of the chemical plant site with a tetrachlorethylene (PCE) concentration of 100±10mg / L. During the electrocatalytic process, the tetrachloroethylene gradually undergoes a hydrodechlorination reduction reaction, and an effective Degradation produces ethylene and other products. A possible reaction mechanism is shown below. The reaction conditions are shown in Table 1.

[0033] C 2 Cl 4 +2H + +4e - →C 2 h 2 Cl 2 +2Cl - (1)

[0034] C 2 h 2 Cl 2 +H + +2e - →C 2 h 3 Cl+Cl - (2)

[0035] C 2 h 3 Cl+H + +2e - →C 2 h 4 +Cl - (3)

[0036] C 2 h 2 Cl 2 +H + +e - →·C 2 h 2 Cl (4)

[0037] Table 1 Electrocatalytic removal of tetrachlorethylene reaction conditions

[0038]

[0039] After the electrocatalytic reaction is completed, the removal rate of tetrachlorethylene is more than 90%, and the removal rate is increased by more than 20% compared with the tradition...

Embodiment 2

[0041] Turn on the power, and conduct electrocatalytic treatment on the groundwater of the chemical plant site with a trichlorethylene (TCE) concentration of 100±10mg / L. During the electrocatalytic process, trichlorethylene gradually undergoes hydrogenation, dechlorination and reduction reactions, and is effectively degraded at the cathode. , producing products such as acetylene. The reaction mechanism is shown below. The reaction conditions are shown in Table 2.

[0042] C 2 HCl 3 +H + +4e - →C 2 h 2 +3Cl - (5)

[0043] C 2 HCl 3 +H + +e - →·C 2 h 2 Cl 3 (6)

[0044] ·C 2 h 2 Cl 3 +e - +H + →·CHCl 2 + CH 2 Cl (7)

[0045] · CHCl 2 +e - +H + →CH 2 Cl 2 (8)

[0046] Table 2 Electrocatalytic removal of trichlorethylene reaction conditions

[0047]

[0048] After the electrocatalytic reaction is completed, the removal rate of trichlorethylene is more than 92%, and the removal rate is increased by more than 20% compared with the traditional ele...

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Abstract

The invention discloses a surrounding radiation type electro-catalytic device which comprises an electro-catalytic reaction box body, one end of the electro-catalytic reaction box body is connected with a raw water tank, the electro-catalytic reaction box body is electrically connected with a power supply system, and the power supply system is an asymmetric pulse power supply; a rod-shaped anode is arranged in the electro-catalytic reaction box body, a sheet-shaped cathode is laid on the inner wall of the electro-catalytic reaction box body; a water inlet, a water outlet and a sampling port are formed in the electro-catalytic reaction box body, and the water outlet is connected with a purified water tank. According to the surrounding radiation type electro-catalytic device, the surroundingtype cathode and the rod-shaped anode are adopted in the electro-catalytic reaction box body to form a radiation type electric field, so that the area of the cathode in contact with halogenated solvent molecules is increased, and a halogenated solvent is catalytically reduced.

Description

technical field [0001] The invention relates to the field of environmental protection and groundwater pollution treatment, in particular to a surrounding radiation type electrocatalytic device, which is mainly used for removing halogenated solvent pollutants in groundwater. Background technique [0002] Groundwater is an important resource for human survival and development, and it is also one of the widely distributed water resources. But at present, the organic pollution of groundwater in our country is serious, it is difficult to remove, and the pollution of groundwater is concealed, and the self-purification function is limited. Therefore, the ex situ removal of organic pollutants in groundwater is an urgent task. Halogenated solvent pollutants in groundwater, represented by halogenated hydrocarbons, are volatile, highly toxic, and difficult to remove completely. The electrocatalytic technology, a new type of removal method for organic pollutants in aqueous solution de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/467C02F101/36
CPCC02F1/46109C02F1/4676C02F2001/46133C02F2101/36
Inventor 卞兆勇唐晗昱王辉
Owner BEIJING NORMAL UNIVERSITY
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