A kind of MNY catalyst for indoor formaldehyde catalytic removal and preparation method thereof

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

Inactive Publication Date: 2020-07-24
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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  • A kind of MNY catalyst for indoor formaldehyde catalytic removal and preparation method thereof
  • A kind of MNY catalyst for indoor formaldehyde catalytic removal and preparation method thereof
  • A kind of MNY catalyst for indoor formaldehyde catalytic removal and preparation method thereof

Examples

Experimental program
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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 catalysts, preparation methods and application fields, in particular to a MnY catalyst used for catalytic removal of formaldehyde in indoor air and a preparation method thereof. The catalyst is composed of a catalyst carrier NaY molecular sieve and an active component Mn, and the active component Mn uses manganese (II) acetylacetonate as a manganese source. The preparation method is as follows: immerse NaY molecular sieve in the acetone solution containing manganese (II) acetylacetonate, stir until the acetone solvent is completely volatilized to obtain the catalyst precursor; perform temperature program activation in the activation atmosphere, then cool to room temperature and take it out to obtain MnY catalyst. The MnY catalyst prepared by this method is used for the removal of formaldehyde in indoor air. Since the surface of the Y molecular sieve is dispersed with Mn oxide active centers that have a good catalytic effect on the oxidation and removal of formaldehyde, the formaldehyde adsorbed on the surface of the Y molecular sieve can be catalytically degraded into CO. 2 and H 2 O, and is not affected by the adsorption capacity. The method is simple, fast, and environmentally friendly, and shows good catalytic performance in indoor catalytic removal of 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 Patents(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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