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Method for accelerating VOC degradation and generating electricity via photoelectrocatalysis-membrane-coupled microbiological fuel cell system

A fuel cell system, photoelectric catalysis technology, applied in biochemical fuel cells, chemical instruments and methods, separation methods, etc., to achieve the effects of promoting rapid degradation, improving power production capacity, and reducing system costs

Active Publication Date: 2018-04-20
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no reports on the use of photocatalytic membranes as cathodes coupled with microbial fuel cells for VOC treatment.

Method used

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  • Method for accelerating VOC degradation and generating electricity via photoelectrocatalysis-membrane-coupled microbiological fuel cell system
  • Method for accelerating VOC degradation and generating electricity via photoelectrocatalysis-membrane-coupled microbiological fuel cell system
  • Method for accelerating VOC degradation and generating electricity via photoelectrocatalysis-membrane-coupled microbiological fuel cell system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Photocatalytic degradation of ethyl acetate on different conductive substrates

[0018] 0.1g TiO 2 The nanosheets were dispersed in 200uL ultrapure water, sonicated uniformly, and dried naturally at room temperature to form a photocatalytic membrane electrode. The photocatalytic membrane electrode and UV lamp were placed in a 4.5L square column, the system was sealed and 4.37uL was injected into it. Ethyl acetate solution (250ppm), the fan in the square column is turned on before the reaction to make the ethyl acetate volatilize quickly and evenly mix, during the reaction, turn on the 9W ultraviolet lamp, and use gas chromatography to detect the ethyl acetate in the system every 10 minutes. concentration, the reaction time was 60 min, and the removal efficiency of ethyl acetate was calculated.

[0019] figure 1 Among them, the conductive substrates are nickel foam, stainless steel mesh, carbon fiber cloth and carbon felt. It is found that the adsorption and...

Embodiment 2

[0020] Example 2: Photocatalytic degradation of ethyl acetate gas by PCMFC system

[0021] Put the membrane module and UV lamp in a 4.5L square column, seal the system and inject 2.18uL ethyl acetate solution (125ppm) into it, and clamp the two copper clips connecting the wires to the anode graphite rod and cathode membrane electrode respectively. On the top, the wires are connected and led out by the sealed copper nut on the square column, and different external resistances are connected between the two poles to form a circuit. Before the reaction, turn on the fan in the square column to make the ethyl acetate volatilize quickly and mix evenly. During the reaction, connect the circuit, turn on the 9W UV lamp, and use gas chromatography to detect the concentration of ethyl acetate in the system every 10 minutes, and use an ammeter to detect system power output. The reaction time was 70 min, and the removal efficiency of ethyl acetate was calculated.

[0022] figure 2 Among...

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Abstract

The invention provides a method for accelerating VOC degradation and generating electricity via a photoelectrocatalysis-membrane-coupled microbiological fuel cell system, and belongs to the technicalfields of gaseous organic pollutant purification and waste resource utilization. A conductive substrate with one side coated with a photocatalyst layer and the other side coated with a PVDF compositefilm is taken as a negative electrode; graphite particles loaded with electricity-producing microorganisms are taken as a positive electrode; a resistor is externally applied; the components are connected via wires to form a loop; and an ultraviolet lamp is taken as a light source, thereby constructing a photoelectrocatalysis-membrane-coupled microbiological fuel cell system for VOC treatment andelectricity production. In ultraviolet excitation, a photocatalyst produces a large number of electron hole pairs, oxygen obtains electrons to generate an active oxygen substance, which together withholes degrades gaseous pollutants, and the microorganism positive electrode provides electrons for the negative electrode via the external circuit, wherein the electrons together with holes generate electricity. It is proved through experiments that the coupled photoelectrocatalysis system has a better VOC degradation effect than that of single photocatalysis and microbiological fuel cell electrocatalysis.

Description

technical field [0001] The invention belongs to the technical field of gas-phase organic pollutant purification and waste resource utilization, and relates to the preparation of a novel photoelectric catalytic membrane assembly and its coupled microbial fuel cell for photo-catalytic degradation of gas-phase pollutants while generating electric energy, which provides a scientific basis for future air purification technology. Background technique [0002] Volatile organic pollutants (VOCs) refer to a class of organic compounds with a boiling point between 50 and 260 °C, a saturated vapor pressure of more than 133.32 Pa at room temperature, and in the form of vapor at room temperature. VOCs come from a wide range of sources, mainly petroleum, chemical, printing, pharmaceutical and oil storage and transportation. Emissions of volatile organic compounds from various industrial processes can damage air quality and thus endanger human health. At present, the technologies used to c...

Claims

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Application Information

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IPC IPC(8): B01D53/86H01M8/16B01D53/44B01D53/72
CPCB01D53/74B01D53/8671B01D2255/802B01D2257/708H01M8/16H01M2300/0082Y02E60/50Y02P70/50
Inventor 柳丽芬王丽虹
Owner DALIAN UNIV OF TECH
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