Preparation method of coppor cerium catalyst coated on FeCrAl carrior

A catalyst and carrier technology, which is applied in the field of monolithic catalyst preparation, can solve the problems of improved adhesion and complicated operation process, and achieves the effects of strong adhesion, low raw material price and easy installation.

Inactive Publication Date: 2006-09-13
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operation process of these methods is more complicated than the above two metho

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of Copper-Cerium Mixed Oxide Monolithic Catalyst Supported by FeCrAl Honeycomb Support

[0024] Using 400cells / inch 2 FeCrAl honeycomb support. Grind the carrier with sandpaper to increase the roughness, put it in acetone solvent to remove oil and clean it with deionized water, and then carry out oxidation treatment on the carrier. The condition of oxidation treatment is to calcinate the carrier at 1000 ° C for 10 hours, and the heating rate is 10 ° C / min; impregnate the pretreated FeCrAl carrier in γ-Al 2 o 3 In the sol, take it out slowly after 3 minutes to ensure the uniformity of the coating, dry at 120°C for one hour, and calcinate at 500°C for 1 hour after drying; mix 0.0026mol copper nitrate, 0.0147mol cerium nitrate and 0.02076mol citric acid in 76ml Stir in deionized water at 70°C for 6 hours at a stirring speed of 60r / min to obtain a colloidal solution; raise the temperature of the FeCrAl carrier coated with aluminum sol to 600°C, keep it warm...

Embodiment 2

[0028] Preparation of copper cerium mixed oxide monolithic catalyst supported by FeCrAl honeycomb support.

[0029] In the first step of the preparation process, pretreatment 400cells / inch 2 For the FeCrAl honeycomb carrier, the oxidation treatment conditions were changed to calcining the carrier at 950°C for 10 hours, and the heating rate was 10°C / min. Other preparation conditions are with embodiment 1.

[0030] Mechanical and thermal shock resistance tests are the same as in Example 1. The results are as follows: oscillating in 40KHz100W ultrasonic wave for 30 minutes, the catalyst shedding rate was 17.07%; the weight loss of ten thermal shocks was 8.79%.

Embodiment 3

[0032] Preparation of copper cerium mixed oxide monolithic catalyst supported by FeCrAl honeycomb support.

[0033] In the first step of the preparation process, pretreatment 400cells / inch 2 For the FeCrAl honeycomb carrier, the oxidation treatment conditions were changed to calcining the carrier at 1050°C for 10 hours, and the heating rate was 10°C / min. Other preparation conditions are with embodiment 1.

[0034] Mechanical and thermal shock resistance tests are the same as in Example 1. The results are as follows: oscillating in 40KHz100W ultrasonic wave for 30 minutes, the catalyst shedding rate was 18.02%; the weight loss of ten thermal shocks was 9.81%.

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Abstract

A process for preparing the CuCe/FeCrAl catalyst includes such steps as washing FeCrAl carrier with acetone, oxidizing, immersing it in gamma-Al2O3 sol, drying, calcining, quickly putting it in the colloidal solution prepared from copper nitrate, cerium nitrate and citric acid, and calcining.

Description

technical field [0001] The invention relates to a method for preparing a copper-cerium catalyst coated on a FeCrAl carrier, which belongs to the preparation technology of monolithic catalysts. Background technique [0002] Compared with traditional granular catalysts, monolithic catalysts have smaller bed pressure drop, better heat resistance, and larger geometric surfaces that are conducive to heat and mass transfer, so they have more advantages and higher practical value. FeCrAl alloy has a series of excellent properties and has become a promising overall catalyst support material. However, due to the smooth metal surface, the catalyst is poorly bonded, which is the main problem that FeCrAl supports cannot be widely used. At present, a lot of work is devoted to the research of catalyst coating method on FeCrAl carrier. [0003] The preparation methods currently used to coat monolithic catalysts mainly include: [0004] (1) Impregnation method [0005] Direct impregnatio...

Claims

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Application Information

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IPC IPC(8): B01J37/02B01J23/83B01J32/00
Inventor 曾尚红刘源郭强
Owner TIANJIN UNIV
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