Manganese-based catalyst for volatile organic compound governance, and preparation and application thereof

A technology of volatile organic compounds and manganese-based catalysts, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, heterogeneous catalyst chemical elements, etc., can solve the problem that the activity is not as good as precious metals, etc. Achieve the effects of no washing, high anti-sintering, and good catalytic activity

Active Publication Date: 2017-05-10
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Transition metals have the advantages of low price and abundant resources. The oxides composed of transition metals have str

Method used

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  • Manganese-based catalyst for volatile organic compound governance, and preparation and application thereof
  • Manganese-based catalyst for volatile organic compound governance, and preparation and application thereof
  • Manganese-based catalyst for volatile organic compound governance, and preparation and application thereof

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Example Embodiment

[0039] The following is a detailed description of the preparation of the manganese-based catalyst in the present invention, that is, the oxalate colloidal co-precipitation method.

[0040] The specific operation of the oxalate colloidal co-precipitation method is as follows:

[0041] Manganese salt and other metal salts are dissolved in absolute ethanol and stirred at room temperature to prepare a homogeneous metal solution. Other metal salt solutions include one or two of cobalt salt, cerium salt, and chromium salt. Oxalic acid is dissolved in absolute ethanol and forms a uniform and transparent oxalic acid solution at room temperature. Slowly drip the oxalic acid solution into the metal solution and continue to stir for 4-6 h to alcoholyze the metal salt. The obtained metal solid solution solution is vacuum filtered to obtain a solid material and then dried in a 60-80° C. blast oven to obtain a solid layer. The solid layer is calcined in a muffle furnace at 300-700°C to obtain...

Example Embodiment

[0048] Example 1: Manganese-cobalt composite oxide

[0049] Weigh 1.07 g of 50% manganese nitrate aqueous solution and 5.24 g of cobalt nitrate hexahydrate and dissolve them in 200 mL of absolute ethanol, stir until they dissolve, and form a uniform and transparent metal solution. In addition, weigh 3.62 g of oxalic acid dihydrate and dissolve it in 50 mL of absolute ethanol, stir until dissolved, and form a uniform and transparent oxalic acid solution. The oxalic acid solution was slowly dropped into the metal solution, and after all was dissolved, the stirring was continued for 4 h to form a solid suspension. The suspension was vacuum filtered, dried in a 70℃ blast oven for 12 hours, and then placed in a muffle furnace for roasting. The temperature was increased to 500℃ at a heating rate of 2℃ / min, and Mn was obtained after keeping it for 4 hours. 1 Co 3 O x catalyst.

[0050] Mn 1 Co 3 The performance evaluation of Ox catalyst for catalytic combustion of benzene is as follows: ...

Example Embodiment

[0054] Example 2: Manganese-cobalt composite oxide

[0055] Weigh 0.73 g of 50% manganese nitrate aqueous solution and 5.82 g of cobalt nitrate hexahydrate and dissolve them in 200 mL of absolute ethanol, stir until they dissolve, and form a uniform and transparent metal solution. In addition, weigh 3.62 g of oxalic acid dihydrate and dissolve it in 50 mL of absolute ethanol, stir until dissolved, and form a uniform and transparent oxalic acid solution. The oxalic acid solution was slowly dropped into the metal solution, and after all was dissolved, the stirring was continued for 4 h to form a solid suspension. The suspension was vacuum filtered and placed in a 70°C blast oven for 12 hours to dry, and then placed in a muffle furnace for roasting. The temperature was raised to 500°C at a heating rate of 2°C / min, and Mn was obtained after 4 hours. 1 Co 5 O x catalyst.

[0056] Mn 1 Co 5 The performance evaluation of Ox catalyst for catalytic combustion of benzene is as follows:

[00...

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Abstract

The invention discloses a manganese-based catalyst for volatile organic compound governance, and preparation and application thereof. The manganese-based catalyst is prepared from manganese oxide and other transition metal oxides, wherein the mass fraction of the manganese oxide is smaller than 60 percent; the mass fraction of the other transition metal oxides is greater than 40 percent; the other transition metal oxides are pure MxOy; M is Co, Ce, Cr or include Co3O4 and MxOy; M is Ce and Cr; wherein x is greater than or equal to 1 but smaller than or equal to 3, and y is greater than or equal to 1 but smaller than or equal to 4. The invention further discloses a preparation method of the manganese-based catalyst, and the method is an oxalate colloidal state coprecipitation method. In the volatile organic compound governance, the disclosed manganese-based catalyst shows the characteristics of high activity, long service life, high anti-sintering capability and the like on benzene catalytic combustion reaction. The optimum catalyst can realize the complete combustion of stable-structure representative model substrate benzene in VOCs (volatile organic compounds) at the temperature being lower than 230 DEG C under the reaction conditions of normal pressure and the air speed being 30000 mL/(gh); the performance is comparable with the performance of the heavy metal catalyst.

Description

[0001] field of invention [0002] The invention relates to a catalyst for treating volatile organic compounds, which belongs to the technical field of material preparation and environmental protection. Specifically, it relates to a manganese-based catalyst for treating volatile organic compounds, as well as its preparation and application. Background technique [0003] As an important part of environmental protection, the treatment of volatile organic compounds (VOCs) has attracted much attention. At present, there are many technologies for VOCs treatment, but the most effective way is catalytic combustion. The choice of catalyst is the key to governance. The commonly used catalysts can be divided into noble metals and non-noble metals. Precious metals have high activity, but their precious metal particles are easy to agglomerate and grow up at high temperature, and they are easy to form volatile sulfides and nitrides with S, N, etc., which will cause the loss of precious m...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J23/889F23G7/07
CPCB01J23/002B01J23/34B01J23/8892B01J2523/00F23G7/07F23G2209/14B01J2523/67B01J2523/72B01J2523/845B01J2523/3712
Inventor 何丹农袁静叶俊辉高振源赵昆峰蔡婷金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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