MnY catalyst for catalytically removing indoor formaldehyde and preparation method thereof

A catalyst and catalyst carrier technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low absorption efficiency, poor absorption effect, high degradation cost, etc., and achieve improved catalytic activity and good catalytic performance , the effect of large specific surface area

Inactive Publication Date: 2018-03-27
YUNCHENG UNIVERISTY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, the present invention provides a MnY catalyst for catalytic removal of formaldehyde in indoor air and a preparation method thereof to solve the problem of low absorption efficiency, poor absorption effect, high degradation cost, and low absorption efficiency in indoor formaldehyde pollution control. It is easy to cause secondary pollution and other problems during adsorption

Method used

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  • MnY catalyst for catalytically removing indoor formaldehyde and preparation method thereof
  • MnY catalyst for catalytically removing indoor formaldehyde and preparation method thereof
  • MnY catalyst for catalytically removing indoor formaldehyde and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Weigh 5gNaY molecular sieve (SiO 2 / Al 2 o 3 =4.8, aperture The porosity is 50%) impregnated in 50 mL of acetone solution containing 1.4 g of manganese (II) acetylacetonate, and the manganese (II) acetylacetonate is uniformly adsorbed on Y molecular sieves and stirred at 25 ° C until the acetone solvent is completely volatilized to obtain a catalyst precursor;

[0032] (2) In the air, carry out temperature-programmed activation. The temperature-raising program is to increase the temperature at a rate of 3°C / min to 400°C, and activate at a constant temperature for 4 hours, so that manganese (II) acetylacetonate can decompose on NaY, forming a catalyst for the removal of formaldehyde. The active center-manganese oxide was then naturally cooled to room temperature and taken out to obtain a catalyst. In terms of metal, the loading of Mn was 6.1wt%.

[0033] Catalyst catalytic removal of formaldehyde in indoor air Reaction conditions and specific steps for evaluation...

Embodiment 2

[0036] (1) Weigh 5gNaY molecular sieve (SiO 2 / Al 2 o 3 =5.0, aperture Porosity 50%) impregnated in 50mL acetone solution containing 1.9g manganese (II) acetylacetonate, stirred at 35°C until the acetone solvent volatilized completely, and manganese (II) acetylacetonate was evenly adsorbed on Y molecular sieves to obtain the catalyst precursor ;

[0037] (2) In the air, the temperature-programmed activation is carried out. The temperature-raising program is to increase the temperature at a rate of 3°C / min to 450°C, and activate at a constant temperature for 4 hours, so that manganese (II) acetylacetonate can decompose on NaY, forming a catalyst for the removal of formaldehyde. The active center-manganese oxide was then naturally cooled to room temperature and taken out to obtain a catalyst. In terms of metal, the loading of Mn was 8.2wt%.

[0038] Catalyst catalytic removal of formaldehyde in indoor air Reaction conditions and specific steps for evaluation of adsorption cap...

Embodiment 3

[0041] (1) Weigh 5gNaY molecular sieve (SiO 2 / Al 2 o 3 =5.3, aperture porosity 50%) impregnated in 50mL of acetone solution containing 2.58g manganese (II) acetylacetonate, stirred at 30°C until the acetone solvent volatilized completely, and manganese (II) acetylacetonate was evenly adsorbed on Y molecular sieves to obtain the catalyst precursor ;

[0042] (2) In the air, the temperature program activation is carried out. The temperature increase program is to increase the temperature at a rate of 5 °C / min to 500 °C, and activate at a constant temperature for 3 hours, so that manganese (II) acetylacetonate can decompose on NaY, forming a catalyst for the removal of formaldehyde The active center-manganese oxide was then naturally cooled to room temperature and taken out to obtain a catalyst. In terms of metal, the loading of Mn was 11.4wt%.

[0043] Catalyst catalytic removal of formaldehyde in indoor air Reaction conditions and specific steps for evaluation of adsorpti...

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Abstract

The invention relates to the field of catalysts, preparation methods and applications thereof, in particular to a MnY catalyst for catalytically removing indoor formaldehyde and a preparation method thereof. The catalyst is composed of a catalyst carrier NaY molecular sieve and an active component Mn. Manganeseacetylacetonate (II) is a manganese source of the active component Mn. The preparation method comprises the following steps: soaking the NaY molecular sieve in an acetone solution of manganeseacetylacetonate (II), and stirring the mixture till an acetone solvent is fully volatilized to obtain a catalyst precursor; and carrying out temperature programming activation in an activated atmosphere, and then cooling the mixture to room temperature and taking the same out to obtain the MnY catalyst. The MnY catalyst prepared by the method removes formaldehyde in indoor air. As Mn oxide active centers which have good catalytic effects in oxidizing and removing formaldehyde are dispersed to the surface of the Y molecular sieve, formaldehyde adsorbed to the surface of the Y molecular sieve is degraded to CO2 and H2O without being affected by adsorption capacity. The method is concise, quick and environment-friendly, and shows a relatively good catalytic performance in catalytic removal of indoor formaldehyde.

Description

technical field [0001] The invention relates to catalysts, preparation methods and application fields, and more specifically relates to a MnY catalyst used for catalytic removal of formaldehyde in indoor air and a preparation method thereof. Background technique [0002] With the improvement of people's living standards in our country and the development of the real estate industry, interior decoration has become very popular in our country. A series of problems have been caused, especially the indoor air pollution problem caused by interior decoration is becoming more and more serious. According to statistics, the indoor air pollution after decoration is generally several times that of the outdoors, and some places even exceed a hundred times. Indoor air pollutants mainly include formaldehyde, benzene series, ammonia and other volatile substances. Wherein formaldehyde has been determined as carcinogenic and teratogenic shape substance by the World Health Organization, is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/16B01D53/86B01D53/72
CPCB01D53/8668B01J29/166
Inventor 刘赵荣王玉春王晶弓巧娟
Owner YUNCHENG UNIVERISTY
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