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Catalytic combustion catalyst as well as preparation method and application thereof

A catalytic combustion and catalyst technology, applied in the field of catalysis, can solve the problems of uneven dispersion and low utilization of precious metal components, and achieve the effect of increasing the contact area and superior catalytic activity

Inactive Publication Date: 2018-03-06
UNIVERSTAR SCI & TECH SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a catalyst for catalytic combustion and its preparation method, aiming to solve the problems of low utilization rate and uneven dispersion of precious metal components in the above-mentioned existing catalyst technology

Method used

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Examples

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Effect test

preparation example Construction

[0041] In a specific embodiment, the preparation method of the catalyst comprises the following steps:

[0042]Step S01, weighing Al according to the above-mentioned coating composition 2 o 3 、TiO 2 , CeO 2 and ZrO 2 powder, and then mix the weighed powder with deionized water to prepare the coating slurry;

[0043] Step S02, placing the honeycomb ceramics in the coating slurry prepared in step S01, and performing the first dipping treatment;

[0044] Step S03, performing residual slurry cleaning, first drying and roasting on the honeycomb ceramics after the first dipping treatment in step S02;

[0045] Step S04, placing the honeycomb ceramics after the first drying and firing treatment in a mixed solution containing platinum ions and organic acids to perform a second impregnation treatment;

[0046] Step S05 , performing a second drying and firing treatment on the honeycomb ceramics after the second impregnation treatment.

[0047] Specifically, in the above step S01, ...

Embodiment 1

[0065] A kind of preparation method of the catalyst of catalytic combustion, comprises the steps:

[0066] (1) Weigh 70g of active γ-Al in sequence 2 o 3 Powder, 20g rutile TiO 2 powder, 5gCeO 2 powder, 5gZrO 2 powder;

[0067] (2), all powders weighed in above-mentioned (1) are carried out dry powder mixing process, guarantee to mix evenly;

[0068] (3) Add 4L of deionized water to the dry powder mixed uniformly in (2) above, then perform wet mixing, and grind into a water-containing thin slurry;

[0069] (4), placing the cordierite honeycomb ceramics in the thin slurry formed in the above (3), ensuring that the thin slurry is completely submerged in the cordierite honeycomb ceramics, allowing it to stand for 20 minutes, and then taking out the cordierite honeycomb ceramics;

[0070] (5), using compressed air to blow off the residual slurry in the cordierite honeycomb ceramic holes impregnated with dilute slurry;

[0071] (6), drying the cordierite honeycomb ceramics t...

Embodiment 2

[0076] A kind of preparation method of the catalyst of catalytic combustion, comprises the steps:

[0077] (1) Weigh 80g of active γ-Al in sequence 2 o 3 Powder, 10g TiO2 type TiO 2 powder, 5gCeO 2 powder, 5gZrO 2 powder;

[0078] (2), all powders weighed in above-mentioned (1) are carried out dry powder mixing process, guarantee to mix evenly;

[0079] (3) Add 1L of deionized water to the dry powder mixed uniformly in (2) above, then perform wet mixing, and grind into a water-containing thin slurry;

[0080] (4), placing the cordierite honeycomb ceramics in the thin slurry formed in the above (3), ensuring that the thin slurry is completely submerged in the cordierite honeycomb ceramics, allowing the cordierite honeycomb ceramics to stand for 60 minutes, and then taking out the cordierite honeycomb ceramics;

[0081] (5), using compressed air to blow off the residual slurry in the cordierite honeycomb ceramic holes impregnated with dilute slurry;

[0082] (6), drying t...

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Abstract

The invention relates to the technical field of catalysis and specifically discloses a catalytic combustion catalyst as well as a preparation method and application thereof. The catalyst is prepared from cellular ceramic, a coating layer and a platinum metal layer, wherein the coating layer is loaded to the surface of the cellular ceramic, and the platinum metal layer is loaded to the surface of the coating layer; in weight 100%, the coating layer is prepared from the following ingredients of 20% to 80% of Al2O3, 10% to 40% of TiO2, 5% to 30% of CeO2 and 5% to 20% of ZrO2. According to the catalyst disclosed by the invention, the cellular ceramic is utilized as a matrix, and the coating layer and the platinum metal layer are sequentially loaded to the matrix; thus, platinum metal with catalytic activity can be exposed on the surface of a carrier, and a contact area between the platinum and the outside is improved. In addition, the platinum metal can be evenly loaded through competitiveadsorption of organic acid and platinum ions in a preparation method; thus, the catalyst can show more excellent catalytic activity under the situation of reducing a use amount of precious metal.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a catalytic combustion catalyst and its preparation method and application. Background technique [0002] With the development of industrial production, a large amount of organic waste gas is inevitably discharged. Organic waste gas generally contains hydrocarbons, benzene and benzene series, alcohols, ketones, phenols, aldehydes, esters, amines, nitriles, Cyanide etc. This problem is especially more serious in petroleum refining, paint coating, enameled wire and other chemical industries, as well as in electronics, foundry, textile, printing, leather, footwear, furniture and food processing and feed processing industries. The discharge of these organic waste gases has seriously polluted the atmospheric environment and caused great harm to human physical and mental health, so it has attracted widespread attention. [0003] In today's pursuit of sustainable economic and social...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/04B01J37/02B01J37/08B01J23/10B01J23/42C04B41/90F23G7/07
CPCC04B41/009C04B41/52C04B41/90B01J23/002B01J23/10B01J23/42B01J37/0205B01J37/0215B01J37/0217B01J37/088F23G7/07B01J2523/00B01J35/56B01J2523/31B01J2523/3712B01J2523/47B01J2523/49C04B38/0006C04B35/195C04B41/5045C04B41/5031C04B41/5041C04B41/5042C04B41/4539C04B41/0072C04B41/5122C04B41/4535
Inventor 鲁斯唯刘俊刘科勤连长康刘浩波
Owner UNIVERSTAR SCI & TECH SHENZHEN
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