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Preparation method of low-temperature plasma modified catalytic fiber filter material

A low-temperature plasma and plasma technology, applied in separation methods, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve the problems of low input cost and good catalytic effect, and achieve uniform loading, good denitration effect, and load good effect

Active Publication Date: 2020-01-03
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Technical problem: In order to solve the above problems, the purpose of this invention is to propose a method for preparing a low-temperature plasma-modified catalytic fiber filter material, specifically related to plasma-modified Mn / Ce / Fe / Co-based low-temperature catalytic nanofiber filter material A preparation method, the method is based on the existing electrospinning process, adding metal salts into the polyurethane solution to prepare catalyst precursors, after electrospinning, the fiber membrane is modified by low-temperature plasma and coated to obtain low-temperature plasma modification Catalytic fiber filter material, the catalytic fiber filter material can be used in denitrification and dust removal integrated equipment such as industrial bag filter, without the need to modify the existing equipment, its input cost is low, and the catalytic effect is good

Method used

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  • Preparation method of low-temperature plasma modified catalytic fiber filter material
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  • Preparation method of low-temperature plasma modified catalytic fiber filter material

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Embodiment 1

[0037]A method for preparing a catalytic fiber filter material modified by low-temperature plasma, comprising the following steps:

[0038] 1) Polymer pretreatment: take a certain amount of polyurethane (PUR) as the solute, use dimethylformamide (DMF) solution as the solvent to prepare a solution with a mass fraction of 15%, at a temperature of 80 ° C and a magnetic stirrer speed of Stir for 3 hours at a speed of 1300 rpm;

[0039] 2) Conductivity enhancement: Add tetraethylammonium bromide to the solution obtained in step 1) and mix in the solution. The concentration of tetraethylammonium bromide in the mixed solution is 5g / L. Stir at a high speed for 3 hours at a speed of 1300 rpm to obtain a mixed solution;

[0040] 3) Add active components: Weigh the catalyst precursor with a molar ratio of 0.5:0.4:0.07:0.03: AR purity 50% manganese nitrate solution, cerium nitrate powder, iron nitrate powder and cobalt nitrate powder, mix the catalyst precursor with the step 2) Mix and ...

Embodiment 2

[0047] A method for preparing a catalytic fiber filter material modified by low-temperature plasma, comprising the following steps:

[0048] 1) Polymer pretreatment: take a certain amount of polyurethane (PUR) as the solute, use dimethylformamide (DMF) solution as the solvent to prepare a solution with a mass fraction of 18%. Stir for 2h at a speed of 1200 rpm;

[0049] 2) Conductivity enhancement: Add tetraethylammonium bromide to the solution obtained in step 1) and mix in the solution. The concentration of tetraethylammonium bromide in the mixed solution is 8g / L. Stir at a high speed for 2 hours at a speed of 1200 rpm to obtain a mixed solution;

[0050] 3) Add active components: Weigh the catalyst precursor manganese sulfide powder, cerium chloride powder, ferric chloride powder and cobalt chloride powder at a molar ratio of 0.45:0.5:0.06:0.04, and mix the catalyst precursor with step 2) The obtained mixed solution was mixed and stirred for 40 h at a temperature of 100° ...

Embodiment 3

[0057] A method for preparing a catalytic fiber filter material modified by low-temperature plasma, comprising the following steps:

[0058] 1) Take a certain amount of polyurethane (PUR) as a solute, use dimethylformamide (DMF) solution as a solvent to prepare a solution with a mass fraction of 20%. Stir for 3 hours at a rotating speed;

[0059] 2) Conductivity enhancement: Add tetraethylammonium bromide to the solution obtained in step 1) and mix in the solution. The concentration of tetraethylammonium bromide in the mixed solution is 10g / L. Stir at a high speed of 1500 rpm for 2.5 hours to obtain a mixed solution;

[0060] 3) Add active components: Weigh a certain amount of catalyst precursor manganese acetate powder, cerium acetate powder, iron acetate powder and cobalt acetate powder at a molar ratio of 5:4:0.07:0.03, and combine the catalyst precursor with step 2) to obtain The mixed solution was mixed and stirred for 48 hours at a temperature of 80° C. and a magnetic ...

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Abstract

The invention discloses a preparation method of a low-temperature plasma modified catalytic fiber filter material. The method comprises the following steps: 1) weighing polyurethane as a solute, and preparing a solution by using a dimethylformamide solution as a solvent; 2) adding a tetraethylammonium bromide powder into the obtained solution to obtain a mixed solution; 3) adding a catalyst precursor into the mixed solution, and performing stirring to obtain an electrostatic spinning solution; 4) carrying out electrostatic spinning on the electrostatic spinning solution, and collecting spun yarns to obtain a nanofiber film; 5) putting the nanofiber film in a low-temperature plasma modification device, introducing argon, carrying out plasma modification, and cooling the obtained film to room temperature to obtain a low-temperature plasma modified catalytic fiber film; and 6) coating and packaging the low-temperature plasma modified catalytic fiber film to obtain the low-temperature plasma modified catalytic fiber filter material. The method which adopts preparation of the fiber filtration material by combining the electrostatic spinning with the low-temperature plasma modification process as the innovation point has the advantages of wide material sources, easiness in process operation, good product processability, good market competitiveness and good promotion values.

Description

technical field [0001] The invention relates to a method for preparing a low-temperature plasma-modified catalytic fiber filter material, in particular to a method for preparing a plasma-modified Mn / Ce / Fe / Co-based low-temperature catalytic nanofiber filter material, and belongs to the field of catalytic fiber filter material. [0002] technical background [0003] NO X It is one of the main pollutants emitted by coal-fired power plants in my country. Long-term inhalation of NO X Can cause pathological changes in the human respiratory system, while NO X It is also one of the main causes of acid rain. The pollutant removal device based on the bag dust removal process can effectively remove NO in the flue gas X , and the core of the bag dust removal process is the development and preparation of bag filter materials. [0004] Existing cloth bags used in industries such as thermal power, metallurgy, and cement are mainly made of high-performance fiber materials such as polyphe...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/56D04H1/728B01J31/32B01J35/10
CPCB01D53/8628D04H1/728B01J31/32B01D2258/0283B01J35/61
Inventor 刘猛李涛段钰锋
Owner SOUTHEAST UNIV
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