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Technology for catalytically treating VOCs by means of synergy between plasma and mesoporous

A plasma and catalytic treatment technology, which is applied in gas treatment, separation methods, and separation of dispersed particles, can solve the problems of energy consumption and by-product control, and affect industrial applications, etc., to prolong the time of synergistic degradation and effectively Conducive to the degradation of pollutants and the effect of reducing energy consumption

Active Publication Date: 2016-07-27
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing low-temperature plasma synergistic catalytic oxidation technology still cannot solve the problems of energy consumption and by-product control, which affects its industrial application.

Method used

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  • Technology for catalytically treating VOCs by means of synergy between plasma and mesoporous

Examples

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Effect test

Embodiment 1

[0032] Plasma synergistic mesoporous catalysis technology is used to degrade toluene-containing exhaust gas. The granular mesoporous catalyst is filled in the filled low-temperature plasma mesoporous catalytic reactor. The plasma discharge method is high-voltage pulse corona discharge, and the input voltage is 15kv, input frequency is 50Hz. The mesoporous catalyst is SBA-15 molecular sieve, and the surface is modified with 3% phenyl trioxyethyl silane, and then doped with 10% manganese oxide to modify the organic- Inorganic hybrid mesoporous catalyst. Intake mixed gas humidity is 5%, airspeed is 5000h -1 , The mixed gas to be treated enters the low-temperature plasma mesoporous catalytic reactor through a fan, and the synergistic effect of plasma oxidation capability, mesoporous catalyst adsorption and catalytic oxidation makes the removal rate of toluene reach 95.2% at room temperature.

Embodiment 2

[0034] Plasma synergistic mesoporous catalysis technology is used to degrade toluene-containing exhaust gas. The granular mesoporous catalyst is filled in the filled low-temperature plasma mesoporous catalytic reactor. The plasma discharge method is high-voltage pulse corona discharge, and the input voltage is 25kv, input frequency is 50Hz. The mesoporous catalyst is SBA-15 molecular sieve, and its surface is modified with phenyl trioxyethyl silane with a mass fraction of 7%, and then doped with manganese oxide with a mass fraction of 2% to modify the organic- Inorganic hybrid mesoporous catalyst. Intake mixed gas humidity is 20%, airspeed is 5000h -1 , The mixed gas to be treated enters the low-temperature plasma mesoporous catalytic reactor through a fan, and the synergistic effect of plasma oxidation capacity, mesoporous catalyst adsorption and catalytic oxidation makes the removal rate of toluene reach 93.7% at room temperature.

Embodiment 3

[0036] Plasma synergistic mesoporous catalysis technology is used to degrade toluene-containing exhaust gas. The granular mesoporous catalyst is filled in the filled low-temperature plasma mesoporous catalytic reactor. The plasma discharge method is high-voltage pulse corona discharge, and the input voltage is 20kv, input frequency is 500Hz. The mesoporous catalyst is SBA-15 molecular sieve, and its surface is modified with phenyl trioxyethyl silane with a mass fraction of 5%, and then doped with manganese oxide with a mass fraction of 6% to obtain organic- Inorganic hybrid mesoporous catalyst. Intake mixed gas humidity is 15%, airspeed is 5000h -1 , The mixed gas to be treated enters the low-temperature plasma mesoporous catalytic reactor through a fan, and the synergistic effect of plasma oxidation capacity, mesoporous catalyst adsorption and catalytic oxidation makes the removal rate of toluene reach 96.5% at room temperature.

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PUM

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Abstract

The invention discloses a technology for catalytically treating VOCs by means of synergy between plasma and mesoporous.The technology comprises the steps that water vapor is introduced into organic waste gas subjected to dust removal by filtration, the water vapor is mixed with the organic waste gas to be uniform to form mixed gas, the mixed gas is sent to a low-temperature plasma mesoporous catalytic reactor through a fan, by means of the plasma oxidation capacity produced in the discharge process of the low-temperature plasma mesoporous catalytic reactor and adsorption and catalytic oxidation of a meoporous catalyst, VOCs gas in the mixed gas is oxidized into harmless CO2 and H2O, and harmless treatment on VOCs in the organic waste gas is completed; the mesoporous catalyst in the low-temperature plasma mesoporous catalytic reactor can be subjected to organic modification with an amino group or a phenyl group or a sulfhydryl group, and transition metals are doped for modification so as to improve the organic waste gas harmless treatment effect.According to the technology for catalytically treating the VOCs by means of the synergy between the plasma and the mesoporous, the adsorption and catalytic oxidation of the mesoporous catalyst and reinforcement of the plasma are combined together to treat volatile organic waste gas, the energy consumption is low, equipment is simple, and the cost is low.

Description

Technical field [0001] The invention belongs to the technical field of volatile organic gas (VOCs) removal, and specifically relates to a process for treating VOCs with plasma synergistic mesoporous catalysis. Background technique [0002] With the improvement of people's living standards and environmental protection awareness, more and more attention has been paid to the harm caused by air pollution. Large amounts of organic pollutants (VOCs, etc.) and inorganic pollutants (SO) are emitted in industrial production, transportation and daily life. 2 , NOx, etc.) threaten human health and the environment on which it depends. [0003] Among them, volatile organic compounds (VOCs) have a wide variety and wide distribution. They are another category of air pollutants that cannot be ignored after particulate matter, sulfur dioxide and nitrogen oxides. The pollution of VOCs has become one of the important precursors of atmospheric compound pollution in key urban agglomerations and key r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/76B01D53/72
CPCB01D53/72B01D53/76B01D53/8668B01D2255/2073B01D2255/20738B01D2255/20746B01D2255/20761B01D2255/30B01D2255/50B01D2257/708B01D2259/818
Inventor 胡将军王翠萍
Owner WUHAN UNIV
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