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Mn-Co-La composite catalyst for catalytic degradation of VOCs in cooperation with discharge plasma as well as preparation method and application of Mn-Co-La composite catalyst

A technology of discharge plasma and composite catalyst, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., which can solve the problems of high cost and difficult industrial application

Active Publication Date: 2021-09-14
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the combination of discharge plasma and noble metal catalyst has good degradation efficiency, it is difficult to meet the industrial application due to the low content of noble metal in nature and the high cost.

Method used

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  • Mn-Co-La composite catalyst for catalytic degradation of VOCs in cooperation with discharge plasma as well as preparation method and application of Mn-Co-La composite catalyst
  • Mn-Co-La composite catalyst for catalytic degradation of VOCs in cooperation with discharge plasma as well as preparation method and application of Mn-Co-La composite catalyst
  • Mn-Co-La composite catalyst for catalytic degradation of VOCs in cooperation with discharge plasma as well as preparation method and application of Mn-Co-La composite catalyst

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Effect test

Embodiment 1

[0044] The preparation method of the Mn-Co-La composite catalyst for degrading VOCs waste gas of the present embodiment comprises the following steps:

[0045] (1) Measure 29.125mL of manganese nitrate, dilute to 250mL with absolute ethanol, prepare 250mL of 0.5mol / L manganese nitrate solution, weigh 36.35g of cobalt nitrate hexahydrate, dilute to 250mL with absolute ethanol, prepare To obtain 250 mL of 0.5 mol / L cobalt nitrate solution, weigh 54.125 g of lanthanum nitrate hexahydrate, and adjust the volume to 250 mL with absolute ethanol to prepare 250 mL of 0.5 mol / L lanthanum nitrate solution. Measure 20 mL each of manganese nitrate, cobalt nitrate, and lanthanum nitrate solutions, pour them into a beaker to mix the three, and stir ultrasonically for 5 minutes;

[0046] (2) Add citric acid monohydrate to the mixed metal alcohol solution obtained in step (1), heat it to 80°C at a heating rate of 3°C / min at 25°C, and add ammonia solution while stirring to adjust the pH to 7 ...

Embodiment 2

[0050] The preparation method of the Mn-Co-La composite catalyst for degrading VOCs waste gas of the present embodiment comprises the following steps:

[0051] (1) Measure 29.125mL of manganese nitrate, dilute to 250mL with absolute ethanol, prepare 250mL of 0.5mol / L manganese nitrate solution, weigh 36.35g of cobalt nitrate hexahydrate, dilute to 250mL with absolute ethanol, prepare To obtain 250 mL of 0.5 mol / L cobalt nitrate solution, weigh 54.125 g of lanthanum nitrate hexahydrate, and adjust the volume to 250 mL with absolute ethanol to prepare 250 mL of 0.5 mol / L lanthanum nitrate solution. Measure 15mL of manganese nitrate solution, 30mL of cobalt nitrate solution, and 15mL of lanthanum nitrate solution, pour them into a beaker to mix them, and stir them ultrasonically for 5 minutes;

[0052] (2) Add citric acid monohydrate to the mixed metal alcohol solution obtained in step (1), heat it to 80°C at a heating rate of 3°C / min at 25°C, and add ammonia solution while stirr...

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Abstract

The invention discloses a Mn-Co-La composite catalyst for catalytic degradation of industrial waste gas in cooperation with discharge plasma. The composite catalyst comprises an active component and a xerogel carrier, wherein the active components comprise Mn, Co and La, the atomic molar ratio of Mn to Co to La is (0.5-2): (0.5-2): (1-2), and the size of the active components is 4-8nm; and the active components are uniformly and orderly distributed in the xerogel carrier. The composite catalyst has relatively high catalytic degradation and stability on VOCs gas at low temperature. The invention further discloses a preparation method and application of the Mn-Co-La composite catalyst for catalytic degradation of the industrial waste gas in cooperation with the discharge plasma. The preparation method is efficient, simple, green and environment-friendly, and can be applied to large-scale industrial production and cooperative discharge.

Description

technical field [0001] The invention relates to the field of discharge synergistic catalysts for VOCs waste gas treatment, in particular to a Mn-Co-La composite catalyst for catalytic degradation of industrial waste gas by synergistic discharge plasma and its preparation method and application. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds, VOCs) refer to substances whose melting point is lower than room temperature and whose boiling point is between 50°C and 260°C. It is an important precursor of my country's current regional air pollution. It reacts photochemically with nitrogen oxides, sulfur oxides and other substances under light conditions to generate ozone, secondary organic aerosols, and acidic substances. Its secondary conversion can lead to the occurrence of photochemical smog. At the same time, it is also one of the main leading factors of PM2.5, which is the main cause of smog. In addition, a large part of VOCs are flammab...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J35/10B01J37/08B01D53/86B01D53/72B01D53/44B01D53/32
CPCB01J23/8892B01J37/082B01D53/8668B01D53/8687B01D53/32B01D2257/708B01D2257/704B01J35/23B01J35/61B01J35/613
Inventor 李济吾聂云妮蔡伟建李军李俊航李俊潮
Owner ZHEJIANG GONGSHANG UNIVERSITY
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