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Industrial organic waste gas catalytic degradation catalyst cooperated with low-temperature plasma, and preparation method and application of catalyst

A low-temperature plasma, catalytic degradation technology, applied in physical/chemical process catalysts, separation methods, metal/metal oxide/metal hydroxide catalysts, etc., to achieve the effects of easy industrial application, low raw materials, and simple preparation

Active Publication Date: 2016-04-13
ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, low-temperature plasma technology coupled with one-stage in-situ catalysis has a good effect, but the problem of by-products and deep degradation of VOCs needs to be solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Catalyst preparation: The catalyst is prepared by impregnation and calcination, using 50% manganese nitrate aqueous solution, cobalt nitrate, cerium nitrate, and foamed silicon carbide as raw materials, according to the loading of manganese oxide, cobalt oxide, and cerium oxide at 1%, 3%, and 1%. The proportion of the solution is prepared, and after being dried by excessive impregnation of silicon carbide, it is placed in a muffle furnace for calcination at a temperature of 450 ° C for 4 hours to obtain a catalyst.

[0044] Application treatment: The catalyst is 1% MnO supported by foamed silicon carbide with a thickness of 20mm and a pore size of 20ppi x 3%CoO x 1% CeO x / SiC catalyst. The initial gas concentration is: [toluene]=100ppm, with air as the carrier gas, and the flow rate is 2L / min. Discharge voltage is 18KV positive high voltage, and reaction temperature is room temperature, and the removal rate of toluene is 98%, O 3 Residual 4ppm, NO x Residual 0ppm....

Embodiment 2

[0046] Catalyst preparation: The catalyst is prepared by impregnation and calcination, using nickel nitrate, cobalt nitrate, lanthanum nitrate, and foamed silicon carbide as raw materials, and the solution is prepared according to the loading ratio of nickel oxide, cobalt oxide, and lanthanum oxide to 2%, 2%, and 1%. , after drying by excessively impregnating silicon carbide, place it in a muffle furnace for calcination at a temperature of 450°C for 4 hours to obtain the catalyst.

[0047] Application treatment: The catalyst is 2% NiO supported by foamed silicon carbide with a thickness of 20mm and a pore size of 20ppi x 2%CoO x 1%LaO x / SiC catalyst. The initial mixed gas concentration is: [toluene]=50ppm, [xylene]=50ppm, with air as the carrier gas, and the flow rate is 2L / min. Discharge voltage is 18KV positive high voltage, and reaction temperature is room temperature, and the removal rate of toluene, xylene is respectively 99%, 97%, O 3 Residual 12ppm, NO x Residual ...

Embodiment 3

[0049] Catalyst preparation: The catalyst is prepared by impregnation and calcination, using copper nitrate, cobalt nitrate, calcium nitrate, and foamed silicon carbide as raw materials, and preparing solutions according to the ratio of copper oxide, cobalt oxide, and calcium oxide loading to 1%, 3%, and 1%. , after drying by excessively impregnating silicon carbide, place it in a muffle furnace for calcination at a temperature of 450°C for 4 hours to obtain the catalyst.

[0050] Application treatment: the catalyst is 1% CuO supported by foamed silicon carbide with a thickness of 20mm and a pore size of 20ppi x 3%CoO x 1% CaO x / SiC catalyst. The initial mixed gas concentration is: [ethyl acetate]=50ppm, [acetone]=50ppm, with air as the carrier gas, and the flow rate is 2L / min. Discharge voltage is 18KV positive high voltage, and reaction temperature is room temperature, and the removal rate of ethyl acetate, acetone is respectively 99%, 96%, O 3 Residual 5ppm, NO x Resi...

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Abstract

The invention discloses an industrial organic waste gas catalytic degradation catalyst cooperated with low-temperature plasma, and a preparation method and application of the catalyst. The catalyst comprises a carrier, a main active ingredient and a catalyst promotion ingredient, wherein the carrier is SiC; the main active ingredient is a mixture of at least one kind of noble metal and at least one of transition metal oxide or at least one kind of noble metal or at least one kind of transition metal oxide; the catalyst promotion ingredient is a mixture of at least one kind of rare-earth oxide and alkaline earth oxide or at least one kind of rare-earth oxide or at least one kind of alkaline earth oxide; the main active ingredient accounts for 0.1 to 5 percent of the total mass of the catalyst; the catalyst promotion ingredient accounts for 0.1 to 5 percent of the total mass of the catalyst. The catalyst provided by the invention has the advantages that the preparation is simple; the price is low; the service life is long; the performance is good; the catalyst can be used for high-efficiency removal of industrial VOCs waste gas at room temperature after being combined with plasma; in addition, the discharge of low byproducts is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a catalyst for coordinating low-temperature plasma catalytic degradation of industrial organic waste gas and its preparation method and application. Background technique [0002] In recent years, large-scale severe haze has occurred in many cities in my country. The essence is that the concentration of atmospheric aerosols is too high, and volatile organic pollutants (VOCs) are important precursors. In addition, VOCs can also cause atmospheric problems such as photochemical smog, ozone layer destruction, and global warming, and are toxic to humans and animals. Industrial sources, such as organic chemicals, petrochemicals, coal chemicals, pharmaceuticals, printing, spraying, etc., are the main sources of emissions, with an annual output of several million tons. [0003] At present, the methods for treating industrial volatile organic compounds mainly inclu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/83B01J23/78B01J23/66B01J23/63B01J23/656B01J35/04B01D53/86B01D53/44
CPCB01D53/8668B01J23/002B01J23/63B01J23/6562B01J23/66B01J23/78B01J23/83B01J23/8892B01J27/224B01D2255/40B01J2523/00B01J35/56B01J2523/72B01J2523/845B01J2523/3712B01J2523/847B01J2523/17B01J2523/23B01J2523/25
Inventor 吴忠标赵业红刘越王海强翁小乐
Owner ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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