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Stainless steel cloth anodized film metallic honeycomb process for preparation of catalysts

A technology of anodized film and metal honeycomb, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve the problems of narrow carrier application and many preparation steps, and achieve great economic and practical significance , Wide range of materials, high stability effect

Inactive Publication Date: 2008-08-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems such as narrow carrier application and many preparation steps.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A specific embodiment of the preparation of stainless steel anodized film loaded noble metal catalyst, its steps are:

[0020] ●Process the stainless steel wire mesh into the required specifications, make it into a honeycomb shape, and impregnate it in H 2 O, H 2 SO 4 , HCl, C 2 h 5 OH, H 2 o 2 and appropriate amount (CH) 6 N 4 solution for descaling treatment. The volume ratio of the above solution is: 26:1:1:1:1 for descaling, the reaction temperature is room temperature, and the stainless steel wire mesh carrier is immersed in the above solution under stirring state for 1.0-3.0 minutes.

[0021] ●Place descaled stainless steel wire mesh in HNO 3 、H 2 o 2 In the solution, the volume ratio of the above-mentioned solution is: 2:1 for removing ash, the reaction temperature is room temperature, and the stirring and impregnating time is 1.0-3.0 minutes.

[0022] ●Immerse the stainless steel wire mesh for removing dust in H 2 SO 4 , HCl solution, the volume ra...

Embodiment 2

[0027] A specific embodiment of the preparation of stainless steel wire mesh anodized film loaded noble metal catalyst, its steps are:

[0028] ●Process the stainless steel wire mesh into a certain specification and make it into a honeycomb shape.

[0029] ●Then descale the honeycomb mesh carrier: press H 2 O, H 2 SO 4 , HCl, C 2 h 5 OH, (CH) 6 N 4 、H 2 o 2 in the order of adding 390ml H 2 O, 15ml H 2 SO 4 , 15ml HCl, 15ml C 2 h 5 OH, appropriate amount (CH) 6 N 4 , 15ml H 2 o 2 , dubbed into a solution. Immerse the honeycomb screen carrier in the above solution, immerse for 2 minutes under agitation, and wash it with deionized water.

[0030] ●Remove dust from the honeycomb wire mesh carrier that has been descaled: place it in a container containing 30ml HNO 3 , 15ml H 2 o 2 , 955ml H 2 O mixed solution, immersed for 1 minute under stirring, and washed with deionized water.

[0031] ●Put the honeycomb stainless steel carrier in 10ml H 2 SO 4 , 1ml HCl...

Embodiment 3

[0037] Preparation method of anodized film of the present invention Descaling solution Formula

[0038] Reagent

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PUM

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Abstract

A method for preparing stainless steel screen anode oxide film metal honeycomb catalyst adopts stainless steel screen with composite oxide film coated on the surface as a carrier, and noble metal platinum and palladium as active components. The contents of platinum and palladium in active components are respectively 0.1wt% and 0.5 wt%. An anode oxidation preparation process is adopted to form the anode oxide film. A method of dipping is adopted to load noble metal active components. The catalyst is used for treating volatile organic waste gas (toluene, acetone, ethyl acetate, etc.), which has high activity, heat stability and application prospect.

Description

technical field [0001] The invention relates to a catalyst for treating volatile organic waste gas, and mainly relates to a stainless steel mesh anodized film metal carrier loaded noble metal catalyst and a preparation method thereof. technical background [0002] Because stainless steel wire mesh has the advantages of high temperature resistance and easy processing into various shapes, it can be used as a new type of catalyst carrier. Through the process of anodic oxidation technology, a layer of self-growth oxide film is formed on the stainless steel wire mesh, and then the catalyst prepared by loading noble metal can overcome the disadvantages of poor thermal stability and fragility of the ceramic catalyst made of activated alumina loaded noble metal in the past. Catalysts with promising applications. [0003] Chinese patents ZL 03 129367.0 and 200710067768.0 relate to a method for preparing a stainless steel anodic oxide film supported noble metal catalyst, the steps of...

Claims

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Application Information

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IPC IPC(8): B01J23/40B01J35/02B01J37/02C25D11/26
Inventor 陈敏马莹郑小明
Owner ZHEJIANG UNIV