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Method for generating denitration catalyst on filter material in situ

A denitrification catalyst and in-situ generation technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of small quantity, damage to the molecular structure and physical properties of polyphenylene sulfide fibers, etc., and achieve basic There is no material type and shape, no special requirements, no pollution, and the effect of saving treatment costs

Active Publication Date: 2014-07-30
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can connect some polar groups on the surface of polyphenylene sulfide fibers, their number is relatively small, and they will more or less destroy the molecular structure and physical properties of polyphenylene sulfide fibers.

Method used

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  • Method for generating denitration catalyst on filter material in situ
  • Method for generating denitration catalyst on filter material in situ
  • Method for generating denitration catalyst on filter material in situ

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Add 0.6g of dopamine hydrochloride powder into 300mL of deionized water to prepare a 2g / L dopamine solution, and add 0.36g of tris(hydroxymethyl)aminomethane to adjust the pH of the solution to 8.5, and then add polyphenylene sulfide Immerse the ether filter material in the above solution, stir at room temperature for 24 hours, take it out, wash it with water and ethanol, and dry it in a vacuum oven at 80°C to constant weight to prepare a dopamine-modified polyphenylene sulfide filter material;

[0030] Immerse the dopamine-modified polyphenylene sulfide filter material in 0.05M manganese acetate solution, take it out after standing for 1h, rinse off the residual solution with deionized water, and then immerse it in 0.05M potassium permanganate solution for 3h to make In situ generation of MnO on the surface of the filter material 2 Catalyst, finally take out the filter material, wash it with water and ethanol, and dry it to constant weight in a vacuum oven at 80°C to o...

Embodiment 2

[0033] Add 0.9g of dopamine hydrochloride powder into 300mL of deionized water to prepare a 3g / L dopamine solution, and add 0.36g of tris(hydroxymethyl)aminomethane to adjust the pH of the solution to 8.5, and then the polyphenylene sulfide Immerse the ether filter material in the above solution, stir at room temperature for 30 hours, take it out, wash it with water and ethanol, and dry it in a vacuum oven at 80°C to constant weight to prepare a dopamine-modified polyphenylene sulfide filter material;

[0034] Immerse the dopamine-modified polyphenylene sulfide filter material in 0.03M manganese acetate solution, take it out after standing for 2 hours, rinse off the residual solution with deionized water, and then immerse it in 0.06M potassium permanganate solution for 4 hours to make In situ generation of MnO on the surface of the filter material 2 Catalyst, finally take out the filter material, wash it with water and ethanol, and dry it to constant weight in a vacuum oven at...

Embodiment 3

[0037] Add 0.3g of dopamine hydrochloride powder into 300mL of deionized water to prepare a 1g / L dopamine solution, and add 0.4g of tris(hydroxymethyl)aminomethane to it to adjust the pH of the solution to 9, and then the polyphenylene sulfide Immerse the ether filter material in the above solution, stir at room temperature for 18 hours, take it out, wash it with water and ethanol, and dry it in a vacuum oven at 50°C to constant weight to prepare a dopamine-modified polyphenylene sulfide filter material;

[0038] Immerse the dopamine-modified polyphenylene sulfide filter material in a 0.01M manganese acetate solution, take it out after standing for 4 hours, rinse off the residual solution with deionized water, and then immerse it in a 0.03M potassium permanganate solution for 8 hours to make In situ generation of MnO on the surface of the filter material 2 Catalyst, finally take out the filter material, wash it with water and ethanol and dry it to constant weight in a vacuum o...

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Abstract

The invention provides a method for generating a denitration catalyst on a filter material in situ. The method comprises the following steps: firstly, modifying the filter material by utilizing the oxidative self-polymerization reaction of dopamine, coating a layer of poly-dopamine film substances rich in such active groups as phenolic hydroxyl groups, nitrogenous functional groups on the surface of the filter material so as to activate the surface of a polyphenylene sulfide filter material fiber which is inert originally; and then generating a MnO2 catalyst on the surface of the poly-dopamine coated filter material by taking potassium permanganate as an oxidizing agent under the chelation of the poly-dopamine layer and a divalent manganese ion, thereby preparing the composite filter material with the denitration function. The method has the advantages of simplicity in operation, low requirement for instrument equipment, mild reaction conditions, no special requirement for types and shapes of base materials, no pollution to the environment and the like, and a novel concept and a method are provided for the modification and denitration functionalization for the filter material.

Description

technical field [0001] The invention belongs to the technical field of filter material functionalization, and in particular relates to a method for in-situ generating a denitrification catalyst on the surface of a filter material. Background technique [0002] In the process of preparing the denitrification functional composite filter material, the catalyst generally needs to be prepared separately, and then filled inside the filter material through a special process or method. Since the catalyst has no interaction with the surface of the filter fiber, the catalyst is easily blown off by the flue gas from the surface of the filter fiber during use and gradually loses its effect. In addition, the denitrification functional composite filter material prepared in this way has poor air permeability, and the catalyst is unevenly dispersed inside the filter material, which easily causes blockage. In contrast, if the denitrification catalyst can be directly generated in situ on the...

Claims

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Application Information

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IPC IPC(8): B01D39/14B01J23/34B01D53/86B01D53/56
CPCB01D39/14B01D53/56B01D53/86B01J23/34
Inventor 郑玉婴汪谢
Owner FUZHOU UNIV
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