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Cu-Mn-Ce-La composite catalyst for degrading VOCs (Volatile Organic Chemicals) as well as preparation method and application of Cu-Mn-Ce-La composite catalyst

A cu-mn-ce-la, composite catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the strict control requirements of self-propagating reaction process parameters and catalyst loading Problems such as poor control, uneven loading of active components, etc., to achieve excellent low-temperature high-efficiency catalytic efficiency, large application value, and large output effects

Active Publication Date: 2020-12-01
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the process is simple and the cost is low, the degradation effect is not ideal. Compared with the sol-gel method, the impregnation method has the problems of uneven loading of active components on the carrier and poor control of the catalyst loading.
[0008] Publication No. CN 106179393 A discloses the preparation method of the manganin-copper-based catalyst used to degrade VOCs, utilizes the self-propagating reaction of potassium permanganate and copper acetate, and quickly Prepare a manganese-copper catalyst that can catalyze the degradation of toluene, and adjust the catalytic activity of the manganese-copper-based catalyst by changing the molar ratio of Mn and Cu. -1, completely (100%) convert 1000ppm toluene and air mixture into CO2 and H2O, the raw materials used in this catalyst are cheap, the preparation process is simple, efficient, and practical, but no toxic and harmful gases such as NOx will be produced in the preparation process, and the control requirements of the self-propagating reaction process parameters are strict, and the degradation effect is not enough ideal

Method used

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  • Cu-Mn-Ce-La composite catalyst for degrading VOCs (Volatile Organic Chemicals) as well as preparation method and application of Cu-Mn-Ce-La composite catalyst
  • Cu-Mn-Ce-La composite catalyst for degrading VOCs (Volatile Organic Chemicals) as well as preparation method and application of Cu-Mn-Ce-La composite catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Copper nitrate aqueous solution, manganese nitrate aqueous solution, cerium nitrate aqueous solution and lanthanum nitrate aqueous solution of preparation 0.5mol / L;

[0039] (2) Get 5ml of copper nitrate aqueous solution, 5ml of manganese nitrate aqueous solution, 5ml of lanthanum nitrate aqueous solution and 5ml of cerium nitrate aqueous solution respectively, and mix and prepare a mixed solution, that is, the atomic molar ratio of each element Cu:Mn:Ce:La is 1:1: 1:1;

[0040] (3) Add 2.1 g of citric acid to the mixed solution, slowly add 0.91 g / ml dropwise under stirring until the pH of the mixed solution is 7 to obtain a sol;

[0041] (4) The obtained sol was continuously stirred at 80°C for 30min under magnetic stirring, then dried in an oven at 120°C for 4h, then calcined in a muffle furnace at 400°C for 4h, and ground to obtain a Cu-Mn-Ce-La composite catalyst.

Embodiment 2

[0043] (1) Copper nitrate aqueous solution, manganese nitrate aqueous solution, cerium nitrate aqueous solution and lanthanum nitrate aqueous solution of preparation 0.5mol / L;

[0044] (2) Take 4ml of copper nitrate aqueous solution, 8ml of manganese nitrate aqueous solution, 4ml of cerium nitrate aqueous solution and 4ml of lanthanum nitrate aqueous solution respectively, and mix and prepare a mixed solution, that is, the atomic molar ratio of each element Cu:Mn:Ce:La is 1:2: 1:1;

[0045] (3) Add 2.1 g of citric acid to the mixed solution, slowly add 0.91 g / ml dropwise under stirring until the pH of the mixed solution is 7 to obtain a sol;

[0046] (4) The obtained sol was continuously stirred at 80°C for 30min under magnetic stirring, then dried in an oven at 120°C for 4h, then calcined in a muffle furnace at 400°C for 4h, and ground to obtain a Cu-Mn-Ce-La composite catalyst.

Embodiment 3

[0048] (1) Copper nitrate aqueous solution, manganese nitrate aqueous solution, cerium nitrate aqueous solution and lanthanum nitrate aqueous solution of preparation 0.5mol / L;

[0049] (2) Take 4ml of copper nitrate aqueous solution, 4ml of manganese nitrate aqueous solution, 8ml of cerium nitrate aqueous solution and 4ml of lanthanum nitrate aqueous solution respectively, and mix and prepare a mixed solution, that is, the atomic molar ratio of each element Cu:Mn:Ce:La is 1:1: 2:1;

[0050] (3) Add 2.1 g of citric acid to the mixed solution, slowly add 0.91 g / ml dropwise under stirring until the pH of the mixed solution is 7 to obtain a sol;

[0051] (4) The obtained sol was continuously stirred at 80°C for 30min under magnetic stirring, then dried in an oven at 120°C for 4h, then calcined in a muffle furnace at 400°C for 4h, and ground to obtain a Cu-Mn-Ce-La composite catalyst.

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Abstract

The invention relates to the technical field of volatile organic gas waste gas treatment. The invention discloses a Cu-Mn-Ce-La composite catalyst for degrading VOCs and a preparation method and application of the Cu-Mn-Ce-La composite catalyst, sol-gel containing the catalyst is prepared by accurately regulating and controlling the proportion of multiple elements, and the composite catalyst is small in particle size and high in specific surface area and shows very excellent low-temperature efficient catalytic efficiency. The catalyst is used for removing organic volatile waste gas, and especially has a very excellent low-temperature catalytic effect on xylene waste gas, and T90 can be as low as 230 DEG C.

Description

technical field [0001] The invention relates to the technical field of volatile organic gas waste gas treatment, in particular to a Cu-Mn-Ce-La composite catalyst for degrading VOCs and its preparation method and application. Background technique [0002] Volatile organic compounds (VOCs) refer to organic compounds whose saturated vapor pressure is greater than 70Pa at normal temperature and whose boiling point is below 260°C at normal pressure. VOCs are a large class of carbon-based chemicals that evaporate readily at room temperature. [0003] Volatile organic compounds (VOCs) mainly include halogenated compounds (such as chloroform, chlorobenzene and trichloroethylene), aldehydes (such as formaldehyde), aromatic compounds (such as xylene, toluene and benzene, etc.), polycyclic aromatic hydrocarbons (such as naphthalene, phenanthrene), alcohols (such as ethanol) and ketones (such as acetone). They are harmful to the environment and human health. VOCs are not only toxic, ...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J37/00B01J37/03B01J37/34F23G7/07B01D53/86B01D53/72
CPCB01J23/8892B01J37/0018B01J37/036B01J37/349B01D53/8668F23G7/07B01D2257/708F23G2209/14Y02A50/20
Inventor 李济吾陈玉柱蔡伟建
Owner ZHEJIANG GONGSHANG UNIVERSITY
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