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Room temperature nitric oxide adsorption/ catalytic oxidation catalyst and preparation method thereof

A nitric oxide, catalytic oxidation technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of poor stability, catalytic activity of nitric oxide, high energy consumption and high cost

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

[0005] The present invention aims at the nitric oxide catalytic oxidation catalysts currently developed to show higher catalytic activity for nitric oxide, higher energy consumption and cost, and stable Still not well resolved and other deficiencies, a catalytic oxidation catalyst for nitrogen monoxide with certain adsorption / catalytic oxidation performance under normal temperature conditions is provided, which can realize partial conversion of nitrogen monoxide under normal temperature conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 0.021mol cerium ammonium nitrate and 0.012mol potassium permanganate in 300mL deionized water to make a mixed solution;

[0022] Dissolve 0.002mol manganese nitrate in 50mL deionized water;

[0023] 0.2mol potassium hydroxide solution in 100mL deionized water

[0024] Pour the manganese nitrate solution into the mixed solution of ammonium cerium nitrate and potassium permanganate, and stir well with a mechanical stirrer;

[0025] Heat the mixed solution to 80°C and keep the temperature constant;

[0026] Add potassium hydroxide solution dropwise to the solution described in step (3) to pH=8-9;

[0027] The obtained deposit was washed and dried, and calcined at 400°C for 4 hours to obtain the desired catalyst.

[0028] The catalytic performance of the prepared catalyst was evaluated according to the aforementioned test conditions, and the concentration of nitrogen monoxide was 15 ppm. The catalytic conversion rate of nitric oxide was determined to be 11-13%,...

Embodiment 2

[0030] Dissolve 0.021mol cerium ammonium nitrate and 0.012mol potassium permanganate in 300mL deionized water to make a mixed solution;

[0031] Dissolve 0.002mol manganese nitrate in 50mL deionized water;

[0032] Put 0.2mol potassium carbonate solution in 100mL deionized water;

[0033] Pour the manganese nitrate solution into the mixed solution of ammonium cerium nitrate and potassium permanganate, and stir well with a mechanical stirrer;

[0034] Heat the mixed solution to 80°C and keep the temperature constant;

[0035] Add potassium hydroxide solution dropwise to the solution described in step (3) to pH=8-9;

[0036] The obtained deposit was washed and dried, and calcined at 400°C for 4 hours to obtain the desired catalyst.

[0037] The catalytic performance of the prepared catalyst was evaluated according to the aforementioned test conditions, and the concentration of nitrogen monoxide was 15 ppm. The catalytic conversion rate of nitric oxide was determined to be 10...

Embodiment 3

[0039] Dissolve 0.021mol cerium ammonium nitrate and 0.012mol potassium permanganate in 300mL deionized water to make a mixed solution;

[0040] Dissolve 0.002mol manganese nitrate in 50mL deionized water;

[0041] Dissolve 0.4mol potassium hydroxide solution in 100mL deionized water

[0042] Pour the manganese nitrate solution into the mixed solution of ammonium cerium nitrate and potassium permanganate, and stir well with a mechanical stirrer;

[0043] Heat the mixed solution to 80°C and keep the temperature constant;

[0044] Add potassium hydroxide solution dropwise to the solution described in step (3) to pH=8-9;

[0045] The obtained deposit was washed and dried, and calcined at 400°C for 4 hours to obtain the desired catalyst.

[0046] The catalytic performance of the prepared catalyst was evaluated according to the aforementioned test conditions, and the concentration of nitrogen monoxide was 15 ppm. The catalytic conversion rate of nitric oxide was determined to b...

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Abstract

The invention provides a room temperature nitric oxide adsorption / catalytic oxidation catalyst, and is characterized in that: the catalyst uses manganese cerium solid solution as an active component, the manganese cerium solid solution content is 100%, and the molar ratio of manganese to cerium is 2:3-1:1. The preparation method comprises the following steps: dissolving ammonium ceric nitrate and potassium permanganate in deionized water; dissolving manganese nitrate in the deionized water; dissolving a potassium hydroxide solution in the deionized water; pouring a manganese nitrate solution into an ammonium ceric nitrate and potassium permanganate mixed solution, using a mechanical stirrer for full and evenly stirring; heating the mixed solution to 70 to 80 DEG C for homoiothermy; dropwise adding a potassium hydroxide solution until the pH is 8-9; washing and drying a obtained sedimentation, and then baking at 300-400 DEG C for 3-4 hours to obtain the room temperature nitric oxide adsorption / catalytic oxidation catalyst. The method has the characteristics of simple preparation process, high adsorption / catalytic oxidation efficiency and the like.

Description

technical field [0001] The invention relates to a nitric oxide adsorption / catalytic oxidation catalyst under normal temperature and pressure conditions and a preparation method thereof, which is suitable for oxidation of low-concentration nitric oxide in air pollutants and has application prospects in the field of environmental purification. Background technique [0002] Nitric oxide is one of the main pollutants that cause air quality degradation. It mainly comes from the combustion of fuels, such as the combustion of industrial coal and the combustion of motor vehicle fuels. The main reason for the harm of nitrogen oxides to human health is that they can form acid rain and photochemical smog. With the improvement of human living standards and the strengthening of health and environmental protection awareness, the requirements for the living environment have become more stringent. For example, the domestic standardization of motor vehicle exhaust emissions has strictly limi...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01D53/86B01D53/56
Inventor 王发根刘爽张豪杰董亚梅王婷何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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