PEC system for treating ammonia and generating electricity by photoelectrically activating persulfate through transitional bimetallic oxidation composite catalytic materials

A technology for oxidizing composite catalytic materials and activating persulfate, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, air quality improvement, etc., can solve secondary heavy metal pollution and cannot be easily separated And other issues

Active Publication Date: 2021-05-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Co in transition metal ions 2+ performance is much better than V 3+ , Mn 2+ , Fe 2+ , Fe 3+ , Ni 2+ and other transition metal ions, however, on the one hand, homogeneous transition metal ions cannot be easily separated; on the other hand, Co ions can cause secondary heavy metal pollution

Method used

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  • PEC system for treating ammonia and generating electricity by photoelectrically activating persulfate through transitional bimetallic oxidation composite catalytic materials
  • PEC system for treating ammonia and generating electricity by photoelectrically activating persulfate through transitional bimetallic oxidation composite catalytic materials

Examples

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Effect test

Embodiment 1

[0018] Example 1: PEC system photocatalytic removal of ammonia

[0019] The whole system is composed of ammonia gas generation part, photoelectric catalysis part, illumination part, circuit part and detection part. Specifically, it is as follows: a membrane module, a lamp, and a fan are placed in a stainless steel airtight reactor with a volume of 3.5 L, and after the lid is closed, 2 μL of NH is injected into the reactor. 3 ·H 2 O(100ppm NH 3 ), the fixed small fan in the system is turned on before the reaction, so that the injected ammonia water can be quickly volatilized in a short time and mixed evenly in the reactor. The rod corrodes in the electrolyte as the anode; the other chamber consists of CuO-Co 3 o 4 Catalyzed activated persulfate film is used as the cathode, and the two stages are connected to the external resistance through wires to form a closed circuit, and light is added after the reaction starts. During the treatment process, the ammonia gas concentrati...

Embodiment 2

[0021] Example 2: Electrocatalytic system for treating toxic ammonia

[0022] The prepared CuO-Co 3 o 4The catalytically activated persulfate membrane is fixed on the membrane module, electrolyte and copper rod are added to the other pole of the membrane module, the membrane module is placed in a stainless steel reactor, the circuit is connected, the system is sealed, and 2.0uL ammonia water (100ppmNH 3 ), the fan in the reactor was turned on before the reaction, and after the reaction started, the ammonia concentration in the system was detected by a portable ammonia detector every 10 minutes, and the reaction time was 1 hour, and the removal efficiency of ammonia was calculated.

[0023] figure 2 Among them, under the conditions of different external resistances connected to the circuit, the electrocatalytic system treats ammonia. When the external resistance is 100Ω, the degradation efficiency of the system is the highest, which can reach 92.86%. Moreover, the electrici...

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Abstract

The invention provides a PEC system for treating ammonia gas and generating electricity by photoelectrically activating persulfate through a transitional bimetallic oxidation composite catalytic material, which belongs to the technology of activating persulfate to purify gas phase pollutants and odorous ammonia gas and other air pollution waste resources. Take advantage of technical areas. The copper-cobalt double metal oxide composite is used as a photocathode for in-situ activation and sprayed on the composite to evaporate and concentrate persulfate to generate sulfate radicals with high oxidation potential. The anode is made of copper rods at K 2 SO 4 Corrosion is formed in the electrolyte solution, and a photoelectrocatalytic system is constructed to accelerate the removal rate of ammonia gas. CuO‑Co in electrocatalytic and photocatalytic systems 3 o 4 Catalytically activated persulfate membranes can not only efficiently remove ammonia, but also use the self-contained energy of ammonia to generate electricity, which provides an idea for the "advanced oxidation technology" based on persulfate activation in the field of air purification.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of air pollution waste such as purifying gaseous pollutants and malodorous ammonia by activated persulfate technology, and provides a copper-cobalt double metal oxide compound used as a photocathode to activate persulfate in situ to degrade ammonia The photoelectric catalytic system realizes the efficient removal of ammonia pollution while using the self-contained energy of ammonia to generate electricity, which provides ideas for the "advanced oxidation technology" based on persulfate activation in the field of air purification. Background technique [0002] As we all know, a large amount of pollution of the atmospheric environment has caused many negative effects, and even greatly threatens human life and development. The gas phase pollutant sulfur oxides (SO X ), nitrogen oxides (NO X ), formaldehyde (HCHO), ammonia and other toxic gases directly cause nose and throat irritation, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75B01D53/86B01D53/58
CPCY02A50/20
Inventor 柳丽芬闫彩
Owner DALIAN UNIV OF TECH
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