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Catalytic filtering material with TiO2 thin film protective layer and preparation method for catalytic filtering material

A technology of catalytic filtration and protective layer, which is applied in the field of filtration, can solve the problems of large catalyst load, difficulty in popularization, and high operating temperature, and achieve the effects of simple and easy preparation method, improved denitrification efficiency, and space saving on site

Active Publication Date: 2014-05-21
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Al2O3 porous ceramic filter is a common catalytic filter material, but the filter material has a high operating temperature (>300°C) and low filtration efficiency Promotion in practice
Although there have been many reports on low-temperature denitrification catalysts loaded on needle-punched felt filter materials in recent years, most of them have problems such as large catalyst loads and easy fall-off, and the industrial application prospects are not very clear.

Method used

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  • Catalytic filtering material with TiO2 thin film protective layer and preparation method for catalytic filtering material
  • Catalytic filtering material with TiO2 thin film protective layer and preparation method for catalytic filtering material
  • Catalytic filtering material with TiO2 thin film protective layer and preparation method for catalytic filtering material

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Experimental program
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Effect test

Embodiment 1

[0035] 0.2g of the prepared amorphous MnO 2 The catalyst was added to 20 mL of ethanol and dispersed ultrasonically for 1 h to form MnO with a concentration of 10 mg / mL 2 suspension, and then immerse a circular PPS filter material with a diameter of 3.8 cm into the above suspension, and after continuing to sonicate for 1 hour, take it out and dry it at 110°C. The calculated catalyst loading of the catalytic filter material is 7%. Then immerse the catalytic filter material in 0.07mol / L tetrabutyl titanate ethanol solution, let it stand for adsorption for 1 hour, then dry it at room temperature for 1 hour, and finally immerse it in deionized water to fully hydrolyze it for 0.5 hour, so that the titanium adsorbed on the surface of the filter material Polycondensation of tetrabutyl ester to form TiO 2 gel layer. Repeat the above-mentioned immersion adsorption-hydrolysis polycondensation operation 4 times to deposit a thin layer of TiO on the surface of each fiber in the filter ...

Embodiment 2

[0038] 0.1g of the prepared amorphous MnO 2 The catalyst was added to 10mL of ethanol, ultrasonically dispersed for 0.5h to form MnO with a concentration of 10mg / mL 2 suspension, and then immerse a circular PPS filter material with a diameter of 3.8 cm into the above suspension, continue to sonicate for 2 hours, then take it out and dry it at 90°C. The calculated catalyst loading of the catalytic filter material is 7%. Then immerse the catalytic filter material in 0.07mol / L tetrabutyl titanate ethanol solution, let it stand for adsorption for 0.5h, then dry it at room temperature for 0.5h, and finally immerse it in deionized water to fully hydrolyze it for 20min, so that the adsorbed on the surface of the filter material Polycondensation of tetrabutyl titanate to form TiO 2 gel layer. Repeat the above-mentioned immersion adsorption-hydrolysis polycondensation operation 6 times to deposit a thick layer of TiO on the surface of each fiber in the filter material. 2 The protec...

Embodiment 3

[0041] 0.3g of the prepared amorphous MnO 2 The catalyst was added to 20mL of ethanol and dispersed ultrasonically for 1h to form MnO with a concentration of 15mg / mL 2 suspension, and then immerse a circular PPS filter material with a diameter of 3.8 cm into the above suspension solution, continue ultrasonication for 1 hour, then take it out and dry it at 110°C. The calculated catalyst loading of the catalytic filter material is 9.6%. Then immerse the catalytic filter material in 0.15mol / L tetrabutyl titanate ethanol solution, let it stand for adsorption for 1 hour, then dry it at room temperature for 1 hour, and finally immerse it in deionized water to fully hydrolyze it for 0.5 hour, so that the titanium adsorbed on the surface of the filter material Polycondensation of tetrabutyl ester to form TiO 2 gel layer. Repeat the above-mentioned immersion adsorption-hydrolysis polycondensation operation 3 times to deposit a thick layer of TiO on the surface of each fiber in the f...

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Abstract

The invention provides a catalytic filtering material with a TiO2 thin film protective layer and a preparation method for the catalytic filtering material. The preparation method comprises the following steps of loading a denitration catalyst on a filtering material serving as a substrate by using an ultrasonic method, and wrapping the surface of the filtering material with a layer of TiO2 by using a sol-gel method to prepare the catalytic filtering material with the TiO2 thin film protective layer. According to the catalytic filtering material and the preparation method, the problem of high falling rate of the denitration catalyst in a using process is solved by the TiO2 thin film protective layer; TiO2 has a great number of acid sites, so that the denitration efficiency of the catalyst can be greatly improved, and the loading capacity of the catalyst is reduced; in addition, the condition that the service life of a polyphenylene sulfide needled mat filtering material is shortened by the abrasion of particles in flue gas can also be avoided by the TiO2 thin film protective layer; the catalytic filtering material with the TiO2 thin film protective layer is high in economy and practicability.

Description

technical field [0001] The invention belongs to the technical field of filtration, in particular to a filter with TiO 2 Catalyzed filter material for film protection layer and its preparation method. Background technique [0002] Environmental pollution is a difficult problem that every developing country needs to solve urgently. China is a large coal-burning country, and a large amount of pollutants are emitted during the combustion of coal. According to relevant statistics, 87% of SO in air pollutants 2 , 67% NO x , 71% of CO and 60% of soot come from coal combustion. Among all kinds of coal-fired equipment, the smoke and dust emitted by power plant boilers accounted for more than 40%, and the nitrogen oxide emissions accounted for more than 36.1% of the country's total emissions. growing trend. With the development of our economy and the enhancement of people's awareness of environmental protection, the pollution problem of coal-fired boilers has attracted more and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B01J31/38B01J33/00B01D53/86B01D53/56
CPCB01D53/8628B01D2255/20707B01D2255/2073B01D2258/0283B01J21/063B01J23/34B01J37/036B01J37/343B01D53/56B01D53/86
Inventor 郑玉婴汪谢
Owner FUZHOU UNIV
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