Method for preparing manganese-copper-based catalyst for degrading VOCs (Volatile Organic Compounds)

A catalyst, manganese-copper technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of industrialization difficulty, increase investment cost, corrode equipment, etc., and achieve raw material economy and cost. Economical and easy to operate

Active Publication Date: 2016-12-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The precursors used in the impregnation method are often nitrates, which will produce NO in the subsequent roasting process x , not only high energy consumption, but also pollute the environment
Co-precipitation method often uses alkaline precipit

Method used

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  • Method for preparing manganese-copper-based catalyst for degrading VOCs (Volatile Organic Compounds)
  • Method for preparing manganese-copper-based catalyst for degrading VOCs (Volatile Organic Compounds)
  • Method for preparing manganese-copper-based catalyst for degrading VOCs (Volatile Organic Compounds)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) the preparation method of the catalyst provided in embodiment 1, comprises the steps:

[0033] Mix potassium permanganate and copper acetate evenly in a dry powder mixer (the molar ratio: Mn:Cu=4:1), then spread the mixture on a glass plate, ignite it with an electronic igniter, and react for a few seconds , to obtain a black manganese-copper-based catalyst, and then the appeal black powder was washed with water and filtered to obtain a pure manganese-copper-based (Mn4Cu1) catalyst.

[0034] (2) Catalytic activity test: toluene concentration 1000ppm, gas space velocity 30000ml g catalyst -1 h-1 . Gas chromatography TCD detection reaction tail gas CO 2 And CO, FID detects the content in toluene and other organic matter. The catalyst obtained in Example 1 catalytically burns toluene (90% conversion of toluene) at a temperature of 330°C, and the 50% degradation rate of toluene is 276°C. In the catalytic degradation reaction of toluene, the products are only toluene...

Embodiment 2

[0036] (1) the preparation method of the above-mentioned catalyst provided in embodiment 2, comprises the steps:

[0037] Mix potassium permanganate and copper acetate evenly in a dry powder mixer (molar ratio: Mn:Cu=10:1), then spread the mixture on a glass plate, ignite it with an electronic igniter, and react for a few seconds , to obtain a black manganese-copper-based catalyst, and then the appeal black powder was washed with water and filtered to obtain a pure manganin-copper-based (Mn10Cu1) catalyst.

[0038] (2) Catalytic activity test: toluene concentration 1000ppm, gas space velocity 30000ml g catalyst -1 h -1 . Gas chromatography TCD detection reaction tail gas CO 2 And CO, FID detects the content in toluene and other organic matter. The catalyst obtained in Example 2 of the present invention completely catalytically burns toluene (100% conversion of toluene) at a temperature of 303°C, 90% conversion of toluene is 276°C, and 50% conversion of toluene is at 254°C...

Embodiment 3

[0040] (1) the preparation method of above-mentioned catalyst provided by the present invention, comprises the steps:

[0041] Mix potassium permanganate and copper acetate evenly in a dry powder mixer (molar ratio: Mn:Cu=2:1), then spread the mixture on a glass plate, ignite it with an electronic igniter, and react for a few seconds , to obtain a black manganese-copper-based catalyst, and then the appeal black powder was washed with water and filtered to obtain a pure manganese-copper-based (Mn2Cu1) catalyst.

[0042] (2) Catalytic activity test: toluene concentration 1000ppm, gas space velocity 30000ml g catalyst -1 h -1 . Gas chromatography TCD detection reaction tail gas CO 2 And CO, FID detects the content in toluene and other organic matter. The catalyst prepared in Example 3 of the present invention catalytically burns toluene (50% conversion of toluene) at a temperature of 291°C. In the catalytic degradation reaction of toluene, the products are only toluene, car...

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Abstract

The invention discloses a method for preparing a manganese-copper-based catalyst for degrading VOCs (Volatile Organic Compounds). According to the method, the manganese-copper-based catalyst capable of catalytically degrading toluene is prepared rapidly by using a self-propagating reaction between potassium permanganate and cupric acetate; the catalytic activity of the manganese-copper-based catalyst is regulated and controlled through changing the mole ratio of Mn to Cu, and the catalyst can be used for completely (100%) converting a 1000ppm gas mixture of toluene and air into CO2 and H2O at the reaction temperature range of 303 DEG C to 340 DEG C at normal pressure at the air speed of 30,000ml gcatalyst<1>h<1>; and the raw materials used by the catalyst are low in price, the preparation process is simple and efficient and is high in practicability, and toxic and harmful gases such as NOx cannot be produced in the preparation process. The manganese-copper-based catalyst prepared by using the method shows excellent catalytic combustion activity and can be used for completely eliminating low-concentration VOCs.

Description

technical field [0001] The invention relates to the field of environmental protection and chemical technology, in particular to a manganese-copper-based catalyst for degrading volatile organic compounds and a preparation method thereof, in particular to a manganese-copper-based catalyst for completely catalytic combustion of volatile organic compounds such as toluene Catalyst efficient preparation method. Background technique [0002] Volatile organic compounds (Volatile organic compounds, VOCs) are the main pollutants in the atmosphere, which are seriously affecting and endangering human health. Relevant studies have proved that more than 200 kinds of VOCs have the possibility of carcinogenic, mutagenic or teratogenic to organisms, such as benzene series (benzene, toluene, xylene, etc.). Therefore, the control and treatment of VOCs in the atmosphere is a key issue in environmental protection. Catalytic combustion technology can degrade VOCs into CO by flameless combustion...

Claims

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Application Information

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IPC IPC(8): B01J23/889F23G7/07
CPCB01J23/8892B01J37/349F23G7/07
Inventor 李露明储伟敬方梨
Owner SICHUAN UNIV
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