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Manganese-based oxide catalyst used for catalytic oxidation of ethanol, and preparation method and application thereof

A manganese-based oxide, catalytic oxidation technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problem of high energy consumption and complete conversion temperature of catalyst preparation High cost, high cost of precious metals and other issues, to achieve the effect of high repeatability, low reaction temperature and long life

Inactive Publication Date: 2013-04-24
佛山中科华洋材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the deficiencies of the prior art, in order to solve the problems of high complete conversion temperature, poor selectivity, short service life, high cost of using precious metals, high energy consumption for catalyst preparation, complicated operation and poor repeatability existing in existing catalytic oxidation ethanol catalysts, the present invention provides A manganese-based oxide catalyst and its preparation method are disclosed, which can be used for the elimination of indoor ethanol gas and residual ethanol gas in motor vehicle exhaust

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0055] A preparation method for a manganese-based oxide catalyst for catalytic oxidation of ethanol, the method is a hydrothermal synthesis method, comprising the steps of:

[0056] (1) Mix manganese sulfate and potassium permanganate, dissolve in water, adjust the pH value to 0.2, and the molar ratio of divalent manganese in manganese sulfate to potassium permanganate is 0.5;

[0057] (2) After stirring the mixed solution obtained in step (1) at room temperature for 0.5 h, react at 80°C for 36 h;

[0058] (3) The product obtained in step (2) was centrifuged and washed once, and dried in an oven at 60°C for 30 hours;

[0059] (4) Calcining the dried product in an air atmosphere at 300°C to obtain a manganese-based oxide catalyst for catalytic oxidation of ethanol.

[0060] The performance of the catalyst was investigated in a fixed bed reactor. The amount of catalyst used was 50 mg, the reaction was carried out at normal pressure, the inlet concentration of ethanol was 800 p...

Embodiment 2

[0062] A preparation method for a manganese-based oxide catalyst for catalytic oxidation of ethanol, the method is a hydrothermal synthesis method, comprising the steps of:

[0063] (1) Mix manganese acetate and sodium thiosulfate, dissolve in water, adjust the pH value to 2, and the molar ratio of divalent manganese in manganese acetate to sodium thiosulfate is 2.0;

[0064] (2) After stirring the mixed solution obtained in step (1) at room temperature for 2 hours, react at 200°C for 1 hour;

[0065] (3) The product obtained in step (2) was centrifuged and washed 5 times, and dried in an oven at 200°C for 10 hours;

[0066] (4) Calcining the dried product in an air atmosphere at 900°C to obtain a manganese-based oxide catalyst for catalytic oxidation of ethanol.

[0067] The performance of the catalyst was investigated in a fixed bed reactor. The amount of catalyst used was 50 mg, the reaction was carried out at normal pressure, the inlet concentration of ethanol was 800 pp...

Embodiment 3

[0069] A preparation method for a manganese-based oxide catalyst for catalytic oxidation of ethanol, the method is a hydrothermal synthesis method, comprising the steps of:

[0070] (1) Mix manganese chloride and sodium chlorate, dissolve in water, adjust the pH value to 1, and the molar ratio of divalent manganese in manganese chloride to sodium thiosulfate is 1.5;

[0071] (2) After stirring the mixed solution obtained in step (1) at room temperature for 1 hour, react at 150°C for 15 hours;

[0072] (3) The product obtained in step (2) was centrifuged and washed 3 times, and dried in an oven at 120°C for 16 hours;

[0073] (4) Calcining the dried product in an air atmosphere at 500°C to obtain a manganese-based oxide catalyst for catalytic oxidation of ethanol.

[0074] The performance of the catalyst was investigated in a fixed bed reactor. The amount of catalyst used was 50 mg, the reaction was carried out at normal pressure, the inlet concentration of ethanol was 800 pp...

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Abstract

The invention relates to a preparation method for a manganese-based oxide catalyst used for catalytic oxidation of ethanol. The method is a hydrothermal synthesis method and comprises the following steps: (1) mixing a divalent manganese salt and an oxidizing agent, dissolving an obtained mixture in water and adjusting the pH value of an obtained solution to 0 to 2, wherein the mol ratio of divalent manganese in the divalent manganese salt to the oxidizing agent is 0.5 to 2.0; (2) stirring the mixed solution obtained in step (1) at room temperature and subjecting the mixed solution to a reaction at a temperature of 80 to 200 DEG C for 1 to 36 h; (3) washing and drying a product obtained in step (2); and (4) roasting the dried product so as to obtain the manganese-based oxide catalyst used for catalytic oxidation of ethanol. The manganese-based oxide catalyst has high activity in a low temperature range ( lower than 150 DEG C) and is applicable to elimination of ethanol gas which has not been totally consumed at a low temperature working condition section of a motor vehicle and to elimination of indoor ethanol gas.

Description

technical field [0001] The invention relates to a catalyst, in particular, the invention relates to a manganese-based oxide catalyst for catalytic oxidation of ethanol, a preparation method and application. Background technique [0002] Reducing the emission of volatile gases (VOCs) is one of the main goals of air pollution control. The ethanol gas released slowly from the solvents used in home decoration and building materials is the main source of indoor ethanol pollution. The ethanol gas released from the exhaust gas of motor vehicles powered by ethanol mixed fuel is an important component of motor vehicle exhaust pollution. Both of them are harmful to human health. constitute a major hazard. Catalytic oxidation is the most cost-effective method for air pollutant control. Therefore, it has become an urgent task to improve the quality of people's living environment to study the catalytic technology for efficiently eliminating ethanol pollution and to develop environmenta...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J37/10B01D53/94B01D53/86B01D53/72
Inventor 贺泓张洁张长斌
Owner 佛山中科华洋材料科技有限公司
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