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Preparation method of manganese-based composite metal oxide ozonolysis catalyst

A compound metal and ozone decomposition technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, separation method, etc., can solve the problem of short catalyst life, achieve high stability, and synthesis process The effect of simple, high catalytic deozone activity

Inactive Publication Date: 2019-06-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the deficiencies in the prior art, in order to improve the problem of short service life of catalytic ozonolysis catalysts, the present invention provides a preparation method of a novel manganese-based composite metal oxide catalyst for catalytic ozonolysis. Precursor of composite metal oxide, then roasted to obtain manganese-based composite metal oxide

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  • Preparation method of manganese-based composite metal oxide ozonolysis catalyst
  • Preparation method of manganese-based composite metal oxide ozonolysis catalyst
  • Preparation method of manganese-based composite metal oxide ozonolysis catalyst

Examples

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Embodiment 1

[0032] Dissolve manganese nitrate and cerium nitrate in water respectively, configure a solution with a Mn / Ce molar ratio of 19:1 and mix evenly, mix 50mL NaOH solution and 20mL 30% H 2 o 2 The solution is added to the mixed solution at the same time, the metal ion M n+ with OH - The molar ratio of the solution is 1:2, and the solution changes from a colorless transparent solution to a dark brown turbid solution. After stirring for 20 minutes, it is heated to 60°C in a water bath, refluxed for 12 hours, filtered with suction, washed with deionized water and absolute ethanol, and finally in Dry in a vacuum oven at 60°C for 12 hours, and then bake the vacuum-dried product at 350°C in an air atmosphere to obtain a nanofibrous catalyst CeMn 19 o x -NO 3 ( figure 1 ). The catalyst was pressed into tablets and sieved into 40-60 mesh particles, and 0.1 g of the catalyst was taken and placed in a tubular fixed-bed reactor for evaluation of the catalyst. The results are shown in...

Embodiment 2

[0034] Dissolve manganese acetate and copper acetate in water respectively, configure a solution with a Mn / Cu molar ratio of 9:1 and mix evenly, mix 50mL NaOH solution and 20mL 30% H 2 o 2 The solution is added to the mixed solution at the same time, the metal ion M n+ with OH - The molar ratio of the solution is 1:2, and the solution changes from a blue transparent solution to a black turbid solution. After stirring for 20 minutes, it is heated to 60°C in a water bath, refluxed for 12 hours, filtered with suction, washed with deionized water and absolute ethanol, and finally in a vacuum Dry in an oven at 60°C for 12h. The vacuum-dried product was calcined at 350°C in an air atmosphere to obtain the catalyst CuMn 9 o x -Ac, the XRD pattern of the catalyst obtained is shown in figure 2 . XRD characterization shows that there is no obvious CuO peak, and CuMn is formed 2 o 4 composite metal oxides. The catalyst was pressed into tablets and sieved into 40-60 mesh particl...

Embodiment 3

[0036] Dissolve manganese nitrate and copper nitrate in water respectively, configure a solution with a molar ratio of Mn / Cu of 9:1 and mix evenly, mix 100mL NaOH solution and 30mL 30% H 2 o 2 The solution is added to the mixed solution at the same time, and the metal ion M n+ with OH - The molar ratio of the solution is 1:2, and the solution changes from a blue transparent solution to a black turbid solution. After stirring for 20 minutes, it is heated to 60°C in a water bath, refluxed for 12 hours, filtered with suction, washed with deionized water and absolute ethanol, and finally in a vacuum Dry in an oven at 60°C for 12h. The vacuum-dried product was calcined at 350°C in an air atmosphere to obtain a nanofibrous catalyst MnCu 9 o x -NO 3 ( image 3 ). The catalyst was pressed into tablets and sieved into 40-60 mesh particles, and 0.1 g of the catalyst was taken and placed in a tubular fixed-bed reactor for evaluation of the catalyst. The results are shown in Table...

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Abstract

The invention provides a preparation method of a manganese-based composite metal oxide ozonolysis catalyst, and belongs to the fields of catalysis and environmental protection. The method uses a redoxprecipitation process to synthesize the nano-fibrous manganese-based composite transition metal oxide catalyst. The preparation method of the catalyst has the advantages of simple process, mild conditions, and realization of high stability of catalytic ozonolysis. The catalyst prepared by the method disclosed in the invention has a high ozone removal catalysis activity, and can realize complete removal of ozone at normal temperature.

Description

technical field [0001] The invention belongs to the field of catalyst environmental protection, and in particular relates to a preparation method of a manganese-based composite metal oxide ozone decomposition catalyst. Background technique [0002] Ozone is an important trace component of the natural atmosphere. It is composed of three oxygen atoms. It is an allotrope of oxygen and has strong oxidizing properties. Therefore, it is widely used in medical and health care, chemical oxidation, and sewage treatment. Ozone often produces a large number of residues during use, and these residues are directly discharged into the atmosphere and cause environmental pollution. In addition, the electrical appliances used in people's daily life, such as air purifiers, copiers, etc., will also generate ozone during their work, resulting in excessively high indoor ozone concentrations. In some special environments such as aircraft cabins, since the aircraft enters the stratosphere, ozone ...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J23/889B01J27/25B01J35/02B01D53/86B01D53/66
CPCY02A50/20
Inventor 王树东张磊王胜
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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