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Normal temperature catalyst of nitric oxide and preparation method thereof

A nitric oxide and catalyst technology, which is applied in the field of preparation of catalytic oxidation nitric oxide catalysts, can solve the problems of unsuitable NOx purification treatment, complicated process and high reaction temperature, and achieves improved NO oxidation absorption efficiency, simple process, and catalytic oxidation. Efficient effect

Inactive Publication Date: 2014-05-07
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the research on the catalytic oxidation of nitric oxide, Chinese patent CN101822983A discloses a kind of mesoporous silica as the carrier, one or two mixtures of potassium and molybdenum as the doping component, and platinum as the active component. Catalyst for catalytic oxidation of nitrogen oxides in flue gas prepared by one-step impregnation method, but the process is more complicated, and the reaction temperature is higher at 150-300 °C
The literature discloses a flue gas catalytic oxidation denitrification process, using TiO 2 or ZrO 2 -TiO 2 As the carrier, Co is the catalyst of the active component, but also the reaction temperature is too high, so it is not suitable for NOx purification treatment under normal temperature conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 0.005mol barium nitrate and dissolve it in 5ml deionized water;

[0018] Weigh 3.25 g of 20-40 mesh activated alumina powder; immerse the alumina powder in the above solution at room temperature for 5 hours, then dry it at 120°C for 8 hours, and bake it in a muffle furnace at 450°C for 3 hours;

[0019] Weigh 0.025mol of copper nitrate and manganese nitrate respectively, weigh 0.05mol of ammonium chloride at the ratio of metal ion: ammonium chloride = 1:1 (molar ratio), fully dissolve into a mixed solution, and let stand for 5h;

[0020] The nitric oxide catalyst can be obtained by immersing the calcined alumina powder in the above solution at room temperature and equal volume for 5 hours, then drying at 120° C. for 8 hours, and then drying at 200° C. for 16 hours.

[0021] The catalytic performance of the prepared catalyst was evaluated according to the aforementioned test conditions, and the catalytic conversion rate of NO was determined to be 93%, and the catal...

Embodiment 2

[0023] Weigh 0.005mol barium nitrate and dissolve it in 5ml deionized water;

[0024] Weigh 3.25 g of 20-40 mesh activated alumina powder; immerse the alumina powder in the above solution at room temperature for 5 hours, then dry it at 120°C for 8 hours, and bake it in a muffle furnace at 450°C for 3 hours;

[0025] Weigh 0.01mol copper nitrate and manganese nitrate respectively, weigh 0.02mol ammonium chloride with the ratio of metal ion: ammonium chloride = 1:1 (molar ratio), fully dissolve into a mixed solution, and let stand for 5h;

[0026] The nitric oxide catalyst can be obtained by immersing the calcined alumina powder in the above solution at room temperature and equal volume for 5 hours, then drying at 120° C. for 8 hours, and then drying at 200° C. for 16 hours.

[0027] The catalytic performance of the prepared catalyst was evaluated according to the aforementioned test conditions. It was determined that the catalytic conversion rate of NO was 85%, and the catalyti...

Embodiment 3

[0029] Weigh 0.005mol barium nitrate and dissolve it in 5ml deionized water;

[0030] Weigh 3.25 g of 20-40 mesh activated alumina powder; immerse the alumina powder in the above solution at room temperature for 5 hours, then dry it at 120°C for 8 hours, and bake it in a muffle furnace at 450°C for 3 hours;

[0031] Weigh 0.01mol copper nitrate and 0.025mol manganese nitrate respectively, weigh 0.035mol ammonium chloride with the ratio of metal ion:ammonium chloride=1:1 (molar ratio), fully dissolve into a mixed solution, and let stand for 5h;

[0032] The nitric oxide catalyst can be obtained by immersing the calcined alumina powder in the above solution at room temperature and equal volume for 5 hours, then drying at 120° C. for 8 hours, and then drying at 200° C. for 16 hours.

[0033] The catalytic performance of the prepared catalyst was evaluated according to the aforementioned test conditions. It was determined that the catalytic conversion rate of NO was 89%, and the c...

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Abstract

The invention provides a catalyst for catalytic oxidation of nitric oxide, and is characterized in that: the catalyst comprises the following components by mass percent: 50-80% of aluminum oxide and 20-50% of metal oxide. The preparation method of the catalyst is as follows: active aluminum oxide powder is used as a carrier, and ammonium chloride is used as an auxiliary agent; firstly, the active aluminum oxide powder is subjected to equivalent-volume impregnation with barium nitrate; after drying and calcination, the active aluminum oxide powder is subjected to secondary equivalent-volume impregnation with manganous nitrate and cupric nitrate; after sintering, a metal oxide with high activity forms on the surface of the aluminum oxide, in order to realize catalytic oxidation of nitric oxide at normal temperature. The invention has the characteristics of simple preparation technology, high catalytic oxidation efficiency, etc.

Description

Technical field [0001] The present invention involves a preparation method for catalyzed nitric oxide catalyst catalysts in a normal temperature and normal pressure environment, which is used in the environmental purification field of NOX gas pollutant treatment. Background technique [0002] Among various air pollutants, NO X The pollution and the harm caused by it cannot be ignored.NOX mostly comes from fuel burning, namely car exhaust, industrial kiln discharge, etc.Nox purification treatment can be divided into dry and wet method according to process.The dry method includes non -catalytic reduction method, catalytic reduction method, adsorption method, etc.; Wet method includes acid absorption, alkali absorption, oxidation absorption, etc. [0003] Oxidation and absorption of NOX under oxygen -rich conditions is one of the current research directions.Because 90%to 95%of the burning flue gas is NO, NO is not absorbed in water or alkaline solution except for complexing.In order...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/56
Inventor 张豪杰王发根刘爽董亚梅王婷何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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