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Honeycomb ceramic catalyst, preparation method therefor and application thereof

A honeycomb ceramic and catalyst technology, which is applied in the field of indoor air purification, can solve the problems of enrichment coating amount, catalytic activity reduction, unfavorable catalytic reaction, etc., and achieve strong formaldehyde removal ability, good catalytic effect, and large specific surface area.

Inactive Publication Date: 2016-01-13
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its special structure, honeycomb ceramics are widely used as catalyst supports for indoor air purification. However, with the maturity of cordierite honeycomb carrier preparation technology and the wide application of honeycomb carrier catalysts, some problems of honeycomb carrier catalysts have begun to emerge, such as After running for a period of time, the active powder is easy to fall off from the surface of the carrier, resulting in a decrease in catalytic activity; the coating of the active powder on the surface of the carrier is uneven, local enrichment occurs or the amount of coating is too small, which is not conducive to the progress of the catalytic reaction; slurry preparation Add additives during the process to inhibit the catalytic activity of the catalyst
[0005] Therefore, the current indoor air purification technology still needs to be improved.

Method used

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  • Honeycomb ceramic catalyst, preparation method therefor and application thereof
  • Honeycomb ceramic catalyst, preparation method therefor and application thereof

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Embodiment 1

[0059] Embodiment 1: Preparation of honeycomb ceramic catalyst

[0060] In this embodiment, the honeycomb ceramic catalyst is prepared according to the following steps:

[0061] Step 1: Soak the cordierite honeycomb ceramic carrier in absolute ethanol solution for 8 hours for pretreatment to remove surface impurities, wash with deionized water, dry in an oven at 110°C for 2 hours, and then bake at 500°C to obtain pretreated (surface treated) carrier;

[0062] Step 2: Add 10g of butyl silicate and 10g of butyl acetate into the reaction kettle, add 1000mL of water and stir, and then add surfactant sodium benzenesulfonate, thickener hydroxyethyl cellulose, disperse Sodium hexametaphosphate; then slowly add silica sol, wherein the mass ratio of sodium benzenesulfonate: hydroxyethyl cellulose: sodium hexametaphosphate: silica sol is 50:10:0.5:100, grind with a sand mill Grind finely to obtain the binder coating, and control the pH of the binder coating to be 9;

[0063] Step 3: ...

Embodiment 2

[0068] In this embodiment, the honeycomb ceramic catalyst is prepared according to the following steps:

[0069] Step 1: Soak the cordierite honeycomb ceramic carrier in absolute ethanol solution for 8 hours for pretreatment to remove surface impurities, wash with deionized water, dry in an oven at 110°C for 2 hours, and then bake at 500°C to obtain pretreated (surface treated) carrier;

[0070] Step 2: Add 10g of butyl silicate and 10g of butyl acetate into the reaction kettle, add 1000mL of water and stir, and then add surfactant sodium benzenesulfonate, thickener hydroxyethyl cellulose, disperse Sodium hexametaphosphate; then slowly add silica sol, wherein the mass ratio of sodium benzenesulfonate: hydroxyethyl cellulose: sodium hexametaphosphate: silica sol is 50:10:0.5:100, grind with a sand mill Grind finely to obtain the binder coating, and control the pH of the binder coating to be 9;

[0071] Step 3: Dissolve 12.6g of calcium nitrate hydrate in a mixed solution of 6...

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Abstract

The invention provides a honeycomb ceramic catalyst, a preparation method therefor and an application thereof. The honeycomb ceramic catalyst comprises: a honeycomb ceramic; a coating layer which is formed on the surface of the honeycomb ceramic, and comprises a binder and active ingredients; and noble metal which is loaded on the surface of the coating layer, wherein an active ingredient of the noble metal is calcium phosphate oxide. According to the embodiment of the invention, the honey ceramic catalyst has relatively high activity under a room temperature condition, and can remove formaldehyde in a long-acting manner without losing efficacy; and meanwhile, the coating layer and the honey ceramic are firmly combined, so that the problem that a conventional catalyst active ingredient is easy to drop can be effectively overcome; and the honeycomb ceramic catalyst is low in cost and beneficial for realizing industrial production.

Description

technical field [0001] The invention belongs to the technical field of indoor air purification, and in particular relates to a honeycomb ceramic catalyst and its preparation method and application. Background technique [0002] Formaldehyde is the simplest aliphatic aldehyde, which was first produced by the Russian chemist A.M. Butlerov in 1859 through the hydrolysis of methylene diethyl ester. In contemporary society, formaldehyde has become one of the most important organic chemical raw materials, especially for various building decoration materials. However, as a highly toxic substance, formaldehyde also brings great harm to human beings while being widely used. The World Health Organization (WTO) stipulates the threshold value of formaldehyde for stimulating various physiological functions of the human body, and points out that when the indoor concentration of formaldehyde exceeds the standard of 0.06ppm, it may cause health problems. Therefore, it is extremely importa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18B01J35/04B01J35/10B01D53/86B01D53/72
Inventor 王钰
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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