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Preparation method of stainless steel carrier catalysts and coating process

A technology of supporting catalyst and stainless steel, which is applied in the field of composite catalyst preparation, can solve the problem of poor adhesion between catalyst and stainless steel carrier, and achieve excellent catalytic activity and high temperature thermal stability.

Inactive Publication Date: 2009-06-03
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of preparation method that is suitable for the composite catalyst coated on the stainless steel carrier or substrate; Another purpose of the present invention is to solve the problem that the catalyzer of stainless steel carrier coating exists catalyst and stainless steel carrier poor adhesion performance, Especially the problem of strong combination at high temperature, another object of the present invention is to prepare a composite catalyst with excellent catalytic activity and high temperature thermal stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: First, the stainless steel carrier or substrate was boiled and corroded with dilute hydrochloric acid for 30 minutes, then ultrasonically cleaned with deionized water and oven-dried at 110° C. to obtain a stainless steel substrate with a clean surface. Then mix 10g of pseudo-boehmite powder and water in a weight ratio of 1:3, stir well to make it evenly mixed, and add 8ml of phosphoric acid to prepare an acidic slurry, the pH value of which is 3.5; then the stainless steel carrier is impregnated Or the substrate is coated with slurry twice, and the slurry blocked in the channel is blown away with compressed air.

[0029] Weighing and preparing NiLiLa / γ-Al 2 o 3 Supported catalyst, weigh 0.6089gLiNO 3 , 3.4424gLa(NO 3 ) 2 ·6H 2 O and 5.4711gNi(NO 3 ) 2 ·6H 2 O and fully dissolved it with 12ml of deionized water to obtain a mixed solution containing Ni, La, Li metal ions; then 10g of 60 mesh γ-Al 2 o 3 The carrier is immersed in the mixed solution and...

Embodiment 2

[0031] Embodiment 2: The preparation process and steps of this embodiment are as follows:

[0032] First, the stainless steel carrier was boiled and corroded with 0.1mol / L dilute hydrochloric acid solution for 30 minutes, and then ultrasonically cleaned with deionized water; then it was calcined in a muffle furnace at 800°C for 30 minutes to obtain a clean surface. A stainless steel support or substrate covered with a uniform oxide film.

[0033] Preparation of NiLiLa / γ-Al 2 o 3 Supported catalyst, weigh 0.6089gLiNO 3 , 3.4424gLa(NO 3 ) 2 ·6H 2 O and 5.4711gNi(NO 3 ) 2 ·6H 2 O and fully dissolved it with 12ml of deionized water to obtain a mixed solution containing Ni, La, Li metal ions; then 10g of 60 mesh γ-Al 2 o 3 The carrier is immersed in the mixed solution and left to stand for 24 hours; then dried and calcined at 800°C for 5 hours, and then cooled to room temperature with the furnace to obtain NiLiLa / γ-Al2 o 3 supported catalyst.

[0034] In addition, prepa...

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PUM

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Abstract

The present invention relates to a preparation method of compound catalyst suitable for stainless steel carrier, and belongs to technical field of catalyst preparation process. The catalyst carrier in the invention consists of pseudo boehmite and gamma -Al2O3 with NiO, La2O3 and LiO mixed oxide as the active component, and is coated on the stainless steel carrier or basal body by dipping. Catalyst loading volume on stainless steel is from 20to 40; prepared compound catalyst is in firm combination with stainless steel, has good adhesion force, heat endurance and catalytic performance. The compound catalyst through the invention has broad application prospect in automobile tail gas discharge purifier, methane partial oxidation reforming syngas and fuel battery etc.

Description

technical field [0001] The invention relates to a preparation method of a composite catalyst suitable for stainless steel carrier catalysts, belonging to the technical field of catalyst preparation technology. Background technique [0002] Catalysts are widely used in chemical, refining and pollution control processes. At present, many pollution control devices (such as automobile exhaust catalytic converters, etc.) also use catalysts in large quantities. The research on stainless steel carrier catalysts originally originated from automobile exhaust gas treatment purifiers, and the purifiers used in early automobile exhaust emissions were all ceramic carrier catalytic purifiers. However, in actual use, problems such as low mechanical strength and poor toughness of ceramic carrier catalytic converters have greatly impacted the application of ceramic carrier catalysts. [0003] A new type of stainless steel carrier catalytic converter has gradually attracted widespread atten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J37/025
Inventor 杨志彬丁伟中张云妍汪承磊岳宝华张玉文鲁雄刚
Owner SHANGHAI UNIV
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