Catalyst for eliminating ozone and nitrogen oxide and its prepn. process

A nitrogen oxide and preparation technology, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. Unsatisfactory purification effect and other problems, to achieve good results

Inactive Publication Date: 2002-10-23
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Exist in the prior art that the specific surface area of ​​the catalyst carrier is small (as glass fiber, paper etc.), or the shortcoming that is not easy to shape (as gac, silica gel etc.), because the carrier specific surface area is small, for ozone and nitrogen oxides in the air For air purification devices with low concentration and high air flow rate, the purification effect of the catalyst is not ideal, and the existing catalysts generally only consider the catalytic decomposition of ozone or the catalytic decomposition of nitrogen oxides

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] In Example 1, first, 3% manganese nitrate, 1% copper nitrate, 0.25% nickel nitrate and 0.15% silver nitrate were mixed to prepare a nitrate solution with a concentration of 4.4%; the viscose activated carbon fiber carrier was immersed in After 3 hours in the nitrate solution, take it out and dry it at 40°C, then heat the viscose activated carbon fiber carrier under a nitrogen atmosphere at 300°C for 3 hours to decompose the nitrate in the micropores on the viscose activated carbon fiber carrier into dioxide Manganese, copper oxide, nickel oxide, silver oxide; then add 5% hydrogen in nitrogen at 300°C for 20 minutes to obtain a small amount of corresponding nano-scale single crystal metal in the micropores on the surface of the catalyst carrier; finally, the catalyst carrier is cooled After reaching room temperature, a catalyst to eliminate ozone and nitrogen oxides is obtained.

Embodiment 2

[0014] Example 2: Firstly, 8.4% manganese nitrate, 3.6% copper nitrate, 0.84% ​​nickel nitrate and 0.25% silver nitrate were mixed to prepare a nitrate solution with a concentration of 13.09%; the viscose activated carbon fiber carrier was immersed in After 4 hours in the nitrate solution, take it out and dry it at 50°C, then heat the viscose activated carbon fiber carrier under a nitrogen atmosphere at 350°C for 4 hours to decompose the nitrate in the micropores on the viscose activated carbon fiber carrier into manganese oxide , Copper oxide, nickel oxide, silver oxide; then add 10% hydrogen to 350℃ nitrogen for 30 minutes to obtain a small amount of corresponding nano-scale single crystal metal in the micropores on the surface of the catalyst carrier; finally, cool the catalyst carrier to After room temperature, a catalyst to eliminate ozone and nitrogen oxides is obtained.

Embodiment 3

[0015] In Example 3, firstly, 5% manganese nitrate, 2% copper nitrate, 0.5% nickel nitrate and 0.2% silver nitrate were mixed to prepare a nitrate solution with a concentration of 7.7%; the viscose activated carbon fiber carrier was immersed in After 3.5 hours in the nitrate solution, take it out and dry it at 45°C, then heat the viscose activated carbon fiber carrier under a nitrogen atmosphere at 320°C for 3.5 hours to decompose the nitrate in the micropores on the viscose activated carbon fiber carrier into manganese oxide , Copper oxide, nickel oxide, silver oxide; add 8% hydrogen to nitrogen at 330°C for 25 minutes to obtain a small amount of corresponding nano-scale single crystal metal in the micropores on the surface of the catalyst carrier; finally, cool the catalyst carrier to After room temperature, a catalyst to eliminate ozone and nitrogen oxides is obtained.

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PUM

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Abstract

The preparation method of catalyst for removing ozone and nitrogen oxide includes the following steps: using manganese nitrate, cupric nitrate, nickel nitrate and silver nitrate to prepare nitrate solution, soaking catalyst carrier into nitrate solution, taking out and drying, heating in nitrogen gas, then heating the catalyst carrier in nitrogen and hydrogen mixed gas and cooling to room temp. so as to obtain the invented catalyst. Said catalyst is high in efficiency for ozone decomposition and possess higher reduction efficiency for nitrogen oxide, and its specific area is large, it can be fully contacted with air and can be used for removing harmful gas produced in discharge air-cleaning and sterilizing device and negative ion generator.

Description

1. Technical Field [0001] The invention relates to air purification materials in the field of environmental protection, in particular to a catalyst for eliminating ozone and nitrogen oxides and a preparation process thereof. 2. Background technology [0002] The prior art has the disadvantage that the specific surface area of ​​the catalyst carrier is small (such as glass fiber, paper, etc.), or it is inconvenient to form (such as activated carbon, silica gel, etc.). Due to the small specific surface area of ​​the carrier, it is very difficult for ozone and nitrogen oxides in the air. For air purification devices with low concentration and high air flow rate, the purification effect of the catalyst is not ideal, and the existing catalysts generally only consider the catalytic effect of ozone decomposition or the catalytic decomposition of nitrogen oxides. 3. Summary of the invention [0003] The purpose of the present invention is to overcome the above shortcomings of the prior ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/56B01D53/66B01D53/86B01J23/76B01J23/89B01J37/02
CPCY02A50/20
Inventor 杨兰均李严蔡巍
Owner XI AN JIAOTONG UNIV
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