Cellular ceramic type catalyst for catalytic combustion of perovskite as well as preparation and application thereof

A technology of honeycomb ceramics and catalytic combustion, which is applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. High attachment strength, low catalyst activity, etc., achieve good industrial application prospects, low price, and simple preparation methods

Inactive Publication Date: 2009-05-27
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple to operate, uniformly loaded, and has high adhesion strength of active species. However, during the roasting process, the metal ions adsorbed on the surface of cordierite cannot form a complete perovskite crystal structure due to the interference of the carrier, and the catalyst activity is low.
Secondly, the surface metal ions are easy to interact with the carrier at high temperature, and the catalyst is easy to deactivate; (3) In order to make the crystal phase of the perovskite catalyst on the surface of honeycomb ceramics perfect, many researchers [Fabbrini L, Rossetti I, Forni L, ...

Method used

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  • Cellular ceramic type catalyst for catalytic combustion of perovskite as well as preparation and application thereof
  • Cellular ceramic type catalyst for catalytic combustion of perovskite as well as preparation and application thereof
  • Cellular ceramic type catalyst for catalytic combustion of perovskite as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 10g γ-Al 2 o 3 And 10g citric acid, add 100g deionized water, mix and stir to form a stable suspension. Immerse the honeycomb ceramics made of cordierite into the suspension, take it out after 20 minutes, blow out the residual solution in the channel with high-pressure airflow, let it dry at room temperature for 10 hours, dry it at 110°C for 10 hours, put it in a muffle furnace and bake it at 550°C for 2.5 hours , repeat the above operation to γ-Al 2 o 3 The loading amount is 8wt%, and the γ-Al 2 o 3 coated honeycomb ceramics.

[0026] Use sodium hydroxide and sodium carbonate mixed alkali with a substance ratio of 1:1 as a coprecipitant, add 0.08mol lanthanum nitrate, 0.02mol strontium nitrate, and 0.1mol manganese nitrate to deionized water, and the atomic ratio is 0.8:0.2 : 1.0 to make a mixed solution with a total ion concentration of 0.1mol / L, carry out co-precipitation, control the end point pH = 10, filter and wash the obtained solid precipitate, repla...

Embodiment 2

[0030] According to the method of Example 1, a honeycomb ceramic perovskite catalytic combustion catalyst was prepared. The difference is, take 10g Ce 0.6 Zr 0.4 o 2 and 10g citric acid, add 180g deionized water, mix and stir to form a stable suspension, Ce 0.6 Zr 0.4 o 2 The loading of the coating is 3wt%, La 0.8 Sr 0.2 MnO 3 The loading amount of the catalytically active component is 5.0 wt% based on the mass of the cordierite honeycomb ceramics, and other operations are the same as in Example 1.

Embodiment 3

[0032] Prepare honeycomb ceramic type perovskite catalytic combustion catalyst according to the method of example 1, difference is, get 10g LaMnAl 11 o 19 And 10g tartaric acid, add 80g deionized water, mix and stir to form a stable suspension, LaMnAl 11 o 19 The loading of the coating is 10wt%, La 0.8 Sr 0.2 MnO 3 The loading amount of the catalytically active component is 8wt% based on the mass of the cordierite honeycomb ceramics, and other operations are the same as in Example 1.

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Abstract

The invention discloses a honeycomb ceramics perovskite catalytic combustion catalyst; the honeycomb ceramics with a metal oxide coating is used as a carrier; the catalytic activity components disclosed in formula (I) are loaded; wherein, La, Sr, Co, and Mn respectively represent lanthanum, strontium, cobalt, and manganese; x is equal to 0 to 0.7 and y is equal to 0 to 0.7; the honeycomb ceramics with a metal oxide coating is to load a metal oxide coating of gamma-Al2O3, CemZr1-mO2, LaMnAl11O19, BaMnAl11O19 or Sr12Al14O21 on the surface of the honeycomb ceramics of a dichroite material; wherein, m is equal to 0.1 to 0.8; the mass ratio of the honeycomb ceramics, the metal oxide coating and the catalytic activity components is 1.0 : 0.03 to 0.2 : 0.05 to 0.15. The invention also relates to a preparation method for the catalyst and the applications of the catalytic combustion thereof to eliminate the waste gases of volatile organic compound; the dichroite honeycomb ceramics carrier and the catalytic activity components of the prepared honeycomb ceramics perovskite catalytic combustion catalyst are combined by one metal oxide coating with high adhesiveness and thermal stability, thus leading the catalyst to have the advantages of high mechanical intensity, high activity and good thermal stability. The catalyst provided by the invention is simple in preparation method, is low in the price of the used materials, and has excellent industrial application prospect. La1-xSrxCoyMn1-yO3 (I).

Description

(1) Technical field [0001] The invention relates to a honeycomb ceramic type perovskite catalytic combustion catalyst and its preparation and catalytic combustion application, especially suitable for catalytic combustion to eliminate volatile organic compound waste gas. (2) Background technology [0002] Nowadays, benzene, toluene, xylene, ethyl acetate, Acetone, methanol, formaldehyde and other volatile organic compounds (Volatile organic compounds, referred to as VOCs) exhaust gas. The massive discharge of these harmful gases not only has a serious impact on the local ecological environment but also on the earth's environment, and is one of the causes of atmospheric photochemical smog, greenhouse effect and ozone layer destruction. At the same time, volatile organic waste gas is a pollutant that endangers human health. my country's new "Comprehensive Emission Standards of Air Pollutants" (GB 16297-1996) strictly limits the emission rate and concentration of VOCs such as ...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01D53/44
Inventor 陈银飞卢晗锋黄海凤刘华彦官芳
Owner ZHEJIANG UNIV OF TECH
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