Manganese-copper based composite oxide doped rare earth element catalyst for catalyzing VOCs as well as preparation method and application of catalyst

A technology of copper-based composite and rare earth elements, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of high cost of precious metal catalysts, catalyst poisoning and deactivation, Eliminate the loss of active components and other issues, to achieve the effect of improving redox performance, increasing activity, and promoting uniform distribution

Active Publication Date: 2018-07-27
普利飞尔环保科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, VOCs, such as chlorine or sulfur-containing organic substances, will be strongly adsorbed on the surface of noble metal catalysts or combined with active components after being catalyzed and oxidized, resulting in the loss of active components, catalyst poisoning and deactivation, and the formation of other organic substances at the same time causing secondary pollution.
Moreover, the high cost of noble metal catalysts limits their application.

Method used

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  • Manganese-copper based composite oxide doped rare earth element catalyst for catalyzing VOCs as well as preparation method and application of catalyst
  • Manganese-copper based composite oxide doped rare earth element catalyst for catalyzing VOCs as well as preparation method and application of catalyst
  • Manganese-copper based composite oxide doped rare earth element catalyst for catalyzing VOCs as well as preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This example provides a manganese-copper based composite oxide doped rare earth element catalyst, which is prepared by the following method:

[0036] (1) Soak the cordierite honeycomb ceramic matrix in dilute dilute acid with a concentration of 5% for 4 hours for pretreatment, take it out and dry it at 90°C for 6 hours, and set it aside.

[0037] (2) Immerse the cordierite honeycomb ceramic substrate treated in step (1) in the aluminum sol, take it out and blow off the residual liquid, dry it at 90°C for 6 hours, and bake it at 250°C for 2 hours to obtain a honeycomb ceramic coated with alumina coating , the preparation method of the aluminum sol is: mix pseudo-boehmite powder and deionized water in proportion, add urea, stir well at room temperature, add concentrated nitric acid dropwise to adjust the pH of the slurry to 2, and peptize for 60 minutes to obtain stable aluminum sol. Sol, wherein the mass ratio of pseudo-boehmite powder: deionized water: urea is 3:25:1.5....

Embodiment 2

[0041] This example provides a manganese-copper based composite oxide doped rare earth element catalyst, which is prepared by the following method:

[0042] (1) Soak the cordierite honeycomb ceramic matrix in dilute dilute acid with a concentration of 10% for 12h pretreatment, take it out and dry it at 150°C for 1h, and set it aside.

[0043] (2) Immerse the cordierite honeycomb ceramic substrate treated in step (1) in the aluminum sol, take it out and blow off the residual liquid, dry it at 90°C for 6 hours, and bake it at 250°C for 2 hours to obtain a honeycomb ceramic coated with alumina coating , the preparation method of the aluminum sol is: mix pseudo-boehmite powder and deionized water in proportion, add urea, fully stir at room temperature, add concentrated nitric acid dropwise to adjust the pH of the slurry to 5, and peptize for 240 minutes to obtain stable aluminum sol. Sol, wherein the mass ratio of pseudo-boehmite powder: deionized water: urea is 5: 30: 2.5.

[00...

Embodiment 3

[0047] This example provides a manganese-copper based composite oxide doped rare earth element catalyst, which is prepared by the following method:

[0048] (1) Soak the cordierite honeycomb ceramic matrix in dilute dilute acid with a concentration of 8% for 8h pretreatment, take it out and dry it at 90°C for 3h, and set it aside.

[0049] (2) Immerse the cordierite honeycomb ceramic substrate treated in step (1) in the aluminum sol, take it out and blow off the residual liquid, dry it at 90°C for 6 hours, and bake it at 250°C for 2 hours to obtain a honeycomb ceramic coated with alumina coating , the preparation method of the aluminum sol is: mix pseudo-boehmite powder and deionized water in proportion, add urea, fully stir at room temperature, drop concentrated nitric acid to adjust the pH of the slurry to 3, and peptize for 150 minutes to obtain stable aluminum sol. Sol, wherein the mass ratio of pseudo-boehmite powder: deionized water: urea is 4:28:2.

[0050] (3) Dissolv...

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Abstract

The invention provides a manganese-copper based composite oxide doped rare earth element catalyst for catalyzing volatile organic compounds (VOCs) as well as a preparation method and application of the catalyst. The catalyst disclosed by the invention adopts a high-pore-volume cordierite honeycomb ceramic material as a carrier, and the carrier is sequentially coated with a first metal oxide coating layer, a second metal oxide coating layer and a third metal oxide coating layer from the inside to the outside, wherein the first metal oxide coating layer is active aluminum oxide, the second metaloxide coating layer is a hafnium-lanthanum-cerium oxide, and the third metal oxide coating layer is a manganese-copper based oxide. The catalyst provided by the invention adopts a non-precious metalinstead of a precious metal; and the catalyst provided by the invention has uniformly-dispersed coating layers, binding force between an active component and a matrix is strong, the coating layers arenot easy to fall or crack, and the catalyst can maintain higher activity under high-speed airflow and thermal shock, has stable activity when being used repeatedly, strong catalytic activity to the VOCs, a simple preparation process and low costs, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a manganese-copper-based composite oxide catalyst doped with rare earth elements to catalyze VOCs, a preparation method and application thereof, and belongs to the technical fields of environmental protection catalytic materials and air pollution control. Background technique [0002] Volatile organic compounds, referred to as VOCs, refer to organic compounds with a saturated vapor pressure greater than 133.32 Pa at normal temperature and a boiling point below 50-260°C at normal pressure, or any organic solid or liquid that can volatilize at normal temperature and pressure. It is mainly produced in petroleum refining industry, electronics, printing, paint, medicine, spray paint, printing, artificial leather, pesticide, rubber, degreasing of electronic components and other industries, as well as automobile exhaust. VOCs can pose a great threat to the ecological environment and human health. Under the action of sunlight and heat...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J35/04B01J37/02B01J37/08B01D53/86B01D53/44
CPCB01D53/8687B01J23/002B01J23/8892B01J37/0217B01J37/024B01J37/088B01D2257/708B01J2523/00B01J35/56B01J2523/17B01J2523/31B01J2523/3706B01J2523/3712B01J2523/49B01J2523/72
Inventor 王征杨继新王俊超
Owner 普利飞尔环保科技(上海)有限公司
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