Method for supporting catalyst on the metal base

A metal carrier and catalyst coating technology, which is applied in catalyst carriers, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of easy peeling, complex preparation process, high cost, and achieves simple manufacturing process and equipment requirements, reducing the cost. Chemical preparation process technology, effect of stabilizing the temperature of the reaction system

Inactive Publication Date: 2007-10-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1226465A, US 3920583, US 4196099, US 6540843 directly load the aluminum oxide slurry coating on the metal surface, and the obtained coating has insufficient firmness and is easy to peel off
[0019] Generally speaking, the metal carrier coatings prepared by some existing patents are limited to alumina coatings or alumina coatings doped with a small amount of other metal oxides, and the bonding force between the coating and the metal carrier is relatively small, and the preparation process is complicated. High cost and pollute the environment

Method used

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  • Method for supporting catalyst on the metal base
  • Method for supporting catalyst on the metal base
  • Method for supporting catalyst on the metal base

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Metal surface pretreatment: ultrasonically clean the FeCrAl metal sheet in acetone for 30 minutes, and then ultrasonically clean it in deionized water for 10 minutes to remove oil, oxides and some impurities on the metal surface. After drying at 120°C, the metal sheet is fired at 950°C for 10 hours.

[0053] Preparation of aluminum sol: Dissolve 24g of pseudoboehmite in 200ml of deionized water, carry out hydrolysis reaction to form AlOOH, add nitric acid after stirring for a certain period of time, control the pH value at 2-4, stir and age for 24h, and obtain stable and transparent aluminum Sol.

[0054] Al 2 o 3 Preparation of slurry: 3gAl 2 o 3 ·H 2 O, 27g γ-Al 2 o 3 Mix with 70ml deionized water and ball mill for 18h to get Al 2 o 3 Slurry, add nitric acid to adjust Al 2 o 3 The pH value of the slurry is between 2-4.

[0055] Coating loading: first load aluminum sol on the metal sheet after high temperature oxidation, dry at 40°C for 1 hour and then load...

Embodiment 2

[0057] Metal surface pretreatment: ultrasonically clean the FeCrAl metal sheet in acetone for 30 minutes, and then ultrasonically clean it in deionized water for 10 minutes to remove oil, oxides and some impurities on the metal surface. After drying at 120°C, the metal sheet is fired at 880°C for 10 hours.

[0058] The preparation of aluminum sol: with embodiment 1.

[0059] Al 2 o 3 The preparation of slurry: with embodiment 1.

[0060] Coating load: same as embodiment 1.

Embodiment 3

[0062] Metal surface pretreatment: with embodiment 1.

[0063] Preparation of aluminum sol: Dissolve 12g of pseudoboehmite in 150ml of deionized water, carry out hydrolysis reaction to form AlOOH, add nitric acid after stirring for a certain period of time, control the pH value at 2-4, stir and age for 24 hours, and obtain stable and transparent aluminum Sol.

[0064] Al 2 o 3 The preparation of slurry: with embodiment 1.

[0065] Coating load: same as embodiment 1.

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Abstract

The invention relates to a preparing method of a metal carrier catalyst coating, wherein, the metal carrier catalyst coating which has an alloy metal high temperature treated as a substrate firstly loads a first layer alumina sol AlOOH, after drying loads a second layer Al2O3 paste, then drying and calcining to obtain a firmly coating; or loads mixed paste comprised by Al2O3 and the other metal oxide required by reaction on the dried AlOOH coat to obtain a catalyst active coat after drying and calcining; or an active coating for especial reaction is obtained by further loading paste which is the other metal oxide required by reaction on the second Al2O3 paste coat, and then drying and calcining. Then the active components are loaded on the obtained catalyst coating, after drying and calcining to prepare the metal carrier catalyst. The coating and the metal carrier of the invention are combined firmly. The invention can prepare the composite coating metal carrier catalyst based on different reaction requirement and the process and device for preparing is simple.

Description

technical field [0001] The invention relates to a method for loading a catalyst on a metal substrate, which solves the problem of the bonding firmness between the metal substrate and the coating of the catalytic active component, so that the required metal carrier catalyst can be prepared for different reactions. Background technique [0002] Since the 1970s and 1980s when West Germany VDM first applied metal honeycomb and metal mesh sheet carrier catalysts to the purification of automobile exhaust, metal carrier catalysts and technologies have made great technological progress in the field of motor vehicle exhaust purification. [0003] The metal carrier itself has many advantages, such as good thermal conductivity, high mechanical shock resistance, easy processing, thin wall, high porosity, etc., especially suitable for use in environments with strong endothermic, exothermic reaction systems and strong vibrations, and Provides convenience for system integration. Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/02B01J32/00
Inventor 王树东郏景省周谨张建国袁中山张纯希刘娜王淑娟
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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