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Preparation method of manganese-copper composite nitrogen monoxide normal-temperature catalyst

A nitric oxide, manganese-copper composite technology, applied in catalyst activation/preparation, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of unsuitable NOx purification treatment and high reaction temperature , complex process and other problems, to achieve the effect of high catalytic oxidation efficiency, simple process, and improved absorption efficiency

Inactive Publication Date: 2013-04-03
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, the literature discloses a method using mesoporous silica as the carrier, one or a mixture 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 the method, but the process is more complicated, and the reaction temperature is higher at 150-300 °C
Chinese patent CN101352645 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

[0015] Weigh 0.025mol copper chloride and manganese chloride, and dissolve them in 10ml deionized water;

[0016] Place the above solution in a water bath at 50°C to 80°C, add dropwise ammonia solution and stir vigorously until the pH of the solution reaches 8.0;

[0017] Weigh 10ml (about 6g) of 20-40 mesh activated alumina powder, immerse the alumina powder in the above solution in an equal volume at room temperature for 5 hours, and then dry at 120°C for 24 hours to obtain the nitric oxide catalyst.

[0018] The catalytic performance of the prepared catalyst was evaluated under the aforementioned test conditions, and the NO catalytic oxidation efficiency was determined to be 75%, and the catalytic effect was basically stable within 3 hours.

Embodiment 2

[0020] Weigh 0.025mol copper chloride and 0.01mol manganese chloride, and dissolve them in 10ml deionized water;

[0021] Place the above solution in a water bath at 50°C to 80°C, add dropwise ammonia solution and stir vigorously until the pH of the solution reaches 8.0;

[0022] Weigh 10ml (about 6g) of 20-40 mesh activated alumina powder, immerse the alumina powder in the above solution in an equal volume at room temperature for 5 hours, and then dry at 120°C for 24 hours to obtain the nitric oxide catalyst.

[0023] The catalytic performance of the prepared catalyst was evaluated under the aforementioned test conditions, and the NO catalytic oxidation efficiency was determined to be 68%, and the catalytic effect was basically stable within 3 hours.

Embodiment 3

[0025] Weigh 0.02mol copper chloride and 0.02mol manganese chloride, and dissolve them in 10ml deionized water;

[0026] Place the above solution in a water bath at 50°C to 80°C, add dropwise ammonia solution and stir vigorously until the pH of the solution reaches 8.0;

[0027] Weigh 10ml (about 6g) of 20-40 mesh activated alumina powder, immerse the alumina powder in the above solution in an equal volume at room temperature for 8 hours, and then dry at 150°C for 18 hours to obtain the nitric oxide catalyst.

[0028] The catalytic performance of the prepared catalyst was evaluated under the aforementioned test conditions, and the NO catalytic oxidation efficiency was determined to be 70%, and the catalytic effect was basically stable within 3 hours.

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PUM

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Abstract

The invention provides a preparation method of a manganese-copper composite nitrogen monoxide normal-temperature catalyst. The prepared catalyst is applicable to environmental conditions of normal temperature and pressure and low concentration (NO<=50ppm). The preparation method is characterized by comprising the following steps: taking active aluminum oxide powder as a carrier, impregnating through an equal-volume method to carry a mixed solution of manganese chloride, copper chloride and ammonia water, and drying at 120-150 DEG C to obtain the manganese-copper composite nitrogen monoxide normal-temperature catalyst, thus realizing the normal-temperature catalytic oxidation of nitrogen monoxide. The method has the characteristics of simple preparation process, high catalytic oxidation efficiency and the like.

Description

technical field [0001] The invention relates to a preparation method of a nitrogen monoxide catalyst at normal temperature, in particular to a preparation method of a manganese-copper composite nitrogen monoxide catalyst at normal temperature, which is applied to the field of environmental purification of NOx gas pollutant treatment. Background technique [0002] Among various air pollutants, NO X pollution and the harm it causes cannot be ignored. Most of NOx comes from fuel combustion, that is, vehicle exhaust, industrial kiln emissions, etc. NOx purification treatment can be divided into dry method and wet method according to the process. Dry methods include non-catalytic reduction methods, catalytic reduction methods, adsorption methods, etc.; wet methods include acid absorption, alkali absorption, oxidation absorption, etc. [0003] Oxidation and absorption of NOx under oxygen-enriched conditions is one of the current research directions. Because 90% to 95% of the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J37/02B01D53/86B01D53/56
Inventor 张豪杰王发根刘爽何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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