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A manganese-oxygen composite material that efficiently removes vocs and its preparation method and application

A technology of composite materials and manganese oxide, which is applied in separation methods, chemical instruments and methods, catalyst activation/preparation, etc., can solve problems such as ineffective effects, and achieve excellent continuous working ability, energy saving in the processing process, and fast reaction rate Effect

Active Publication Date: 2021-05-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Preventive measures are source control, which generally control and reduce the generation and emission of VOCs from the source by changing raw materials, technological processes, and production equipment. Although this method is the most direct and effective VOCs control technology, due to the production level my country's achievements in source control are not very obvious

Method used

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  • A manganese-oxygen composite material that efficiently removes vocs and its preparation method and application
  • A manganese-oxygen composite material that efficiently removes vocs and its preparation method and application
  • A manganese-oxygen composite material that efficiently removes vocs and its preparation method and application

Examples

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Effect test

Embodiment 1

[0036] The preparation and application of a new type of composite material that efficiently removes VOCs, the specific steps are as follows:

[0037] Step 1: Add 5 g of carbon nanotubes to 50 mL of deionized water to form a solution, and stir at room temperature until the carbon nanotubes are completely dissolved;

[0038] Step 2: Add 0.10mol / L KMnO to the above solution 4 50 mL of the solution, and then add 0.01 moL of magnesium nitrate and 1.7895 g of manganese nitrate to the solution, react in an oven at 100°C for 2 hours, wash, filter, and dry to obtain a manganese-oxygen composite material.

[0039] Step 3: After mixing and packaging the manganese-oxygen composite material and quartz sand at a mass ratio of 1:2, put them into a microwave reactor with a microwave frequency of 2.45GHz±50MHz, a reaction temperature of 240°C, and an intake concentration of VOCs of 200ppm , the dry air is the equilibrium gas (about 21%O 2 , 79%N 2 ), the microwave power is 100W, and the inl...

Embodiment 2

[0044] The preparation and application of a new type of composite material that efficiently removes VOCs, the specific steps are as follows:

[0045] Step 1: Add 5 g of carbon nanotubes to 50 mL of deionized water to form a solution, and stir at room temperature until the carbon nanotubes are completely dissolved;

[0046] Step 2: Add 0.20mol / L of KMnO to the above solution 4 50 mL of the solution, and then add 0.01 moL of magnesium nitrate and 1.7895 g of manganese nitrate to the solution, react in an oven at 120°C for 3 hours, wash, filter, and dry to obtain a manganese-oxygen composite material.

[0047] Step 3: After mixing and packaging the manganese-oxygen composite material and quartz sand at a mass ratio of 1:2, put them into a microwave reactor with a microwave frequency of 2.45GHz±50MHz, a reaction temperature of 240°C, and an intake concentration of VOCs of 300ppm , the dry air is the balance gas (about 21%O 2 , 79%N 2 ), the microwave power is 100W, and the inle...

Embodiment 3

[0052] The preparation and application of a new type of composite material that efficiently removes VOCs, the specific steps are as follows:

[0053] Step 1: Add 5 g of carbon nanotubes to 50 mL of deionized water to form a solution, and stir at room temperature until the carbon nanotubes are completely dissolved;

[0054] Step 2: Add 0.30mol / L of KMnO to the above solution 4 50 mL of the solution, and then add 0.01 moL of magnesium nitrate and 1.7895 g of manganese nitrate to the solution, react in an oven at 140°C for 4 hours, wash, filter, and dry to obtain a manganese-oxygen composite material.

[0055] Step 3: After mixing and packaging the manganese-oxygen composite material and quartz sand at a mass ratio of 1:2, put them into a microwave reactor with a microwave frequency of 2.45GHz±50MHz, a reaction temperature of 240°C, and an intake concentration of VOCs of 400ppm , the dry air is the balance gas (about 21%O 2 , 79%N 2 ), the microwave power is 100W, and the inle...

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Abstract

The invention discloses a manganese-oxygen composite material for efficiently removing VOCs, a preparation method and application thereof. The specific steps of the preparation method are as follows: the manganese-oxygen composite material doped with Mg and supported on carbon nanotubes prepared by the hydrothermal method is mixed with quartz sand, put into a microwave device, and VOCs gas is introduced , for the removal reaction. Among them, the manganese-oxygen composite material is not only doped with Mg but also supported on carbon nanotubes. The invention has the advantages of fast catalytic rate, high catalytic efficiency, low catalyst cost, simple catalyst synthesis method, strong catalyst stability, no secondary pollution and no need for reprocessing.

Description

technical field [0001] The invention relates to the field of VOCs removal, in particular to a manganese-oxygen composite material for efficiently removing VOCs and its preparation method and application. Background technique [0002] VOCs generally refer to organic compounds with a boiling point between 50-260°C under normal pressure, which mainly exist in gaseous form, mainly including aromatic hydrocarbons, alkane hydrocarbons, ethers, phenols, epoxy compounds , aldehydes, ketones, alcohols, etc. As a by-product of my country's rapid economic development, VOCs not only cause serious pollution to our ecosystem, but also seriously threaten human health. The harm of VOCs mainly has two aspects. The first is the pollution of the natural environment. Some VOCs are discharged into the atmosphere. 2 , NO x Chemical reactions such as organic aerosols and photochemical smog lead to the formation of smog, and some halogenated hydrocarbons in VOCs will trigger a series of chain ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J37/10B01D53/86B01D53/44B01D53/72
CPCB01D53/8668B01D2257/708B01J23/002B01J23/34B01J37/10Y02A50/20
Inventor 蒋翔李瞳孙敬知田蒙蒙
Owner SOUTH CHINA UNIV OF TECH
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