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A diatomite-supported porous bixbyite mn 2 o 3 Catalyst, preparation method and application thereof

A technology of bixbyite and diatomite, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Ideal, restricting large-scale applications, restricting practical applications, etc., to achieve good application prospects, achieve targeted enrichment, and low production costs

Active Publication Date: 2022-04-01
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the price of noble metals limits their large-scale application in industry, therefore, it is particularly important to develop a cheap and efficient catalyst
[0004] In recent years, there have been more and more reports on the use of transition metal oxides to catalyze the elimination of benzene series, especially manganese oxides have shown good catalytic activity and stability (Journal of Industrial and Engineering Chemistry, 2008, 14, 779–784; Applied Catalysis B:Environmental, 2017,209, 689-700), but its synthesis methods are relatively complicated, most of which require templates or organic surfactants, etc., the steps are cumbersome, the cost increases, and the conversion rate of its complete catalytic oxidation of benzene series Still not ideal, the reaction temperature is above 350°C, which limits its practical application

Method used

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  • A diatomite-supported porous bixbyite mn <sub>2</sub> o <sub>3</sub> Catalyst, preparation method and application thereof
  • A diatomite-supported porous bixbyite mn <sub>2</sub> o <sub>3</sub> Catalyst, preparation method and application thereof
  • A diatomite-supported porous bixbyite mn <sub>2</sub> o <sub>3</sub> Catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 1.1 mmol of manganese acetate and 0.2 g of diatomite in Linjiang City, Jilin Province (the mass percentage of diatom shells is about 68%) to 40 mL of a mixed solution of isopropanol and glycerin (volume ratio is 3:1), at room temperature After stirring for 3 hours, the mixed solution was transferred to a polytetrafluoroethylene-lined reactor, and the reactor was placed in a constant temperature drying oven at 180° C. for 6 hours. The obtained suspension was naturally cooled to room temperature, centrifuged and washed with absolute ethanol, and the obtained precipitate was placed in a constant temperature drying oven, and dried at 80° C. for 12 hours to obtain manganese alkoxide / diatomaceous earth solid powder. The powder was placed in a muffle furnace, heated to 500 °C at a heating rate of 3 °C / min, and calcined at a constant temperature for 3 hours to obtain diatomite-supported porous bixbyite Mn 2 o 3 (Mn 2 o 3 / diatomaceous earth-500).

[0028] For the Mn pr...

Embodiment 2

[0031] Add 1.1 mmol of manganese acetate and 0.2 g of diatomite in Linjiang City, Jilin Province (the mass percentage of diatom shells is about 68%) to 40 mL of a mixed solution of isopropanol and glycerin (volume ratio is 3:1), at room temperature After stirring for 3 hours, the mixed solution was transferred to a polytetrafluoroethylene-lined reactor, and the reactor was placed in a constant temperature drying oven at 180° C. for 6 hours. The obtained suspension was naturally cooled to room temperature, centrifuged and washed with absolute ethanol, and the obtained precipitate was placed in a constant temperature drying oven, and dried at 80° C. for 12 hours to obtain manganese alkoxide / diatomaceous earth solid powder. The powder was placed in a muffle furnace, heated to 400 °C at a heating rate of 3 °C / min, and calcined at a constant temperature for 3 hours to obtain diatomite-supported porous bixbyite Mn 2 o 3 (Mn 2 o 3 / diatomaceous earth-400).

[0032] The catalytic...

Embodiment 3

[0034] Add 1.1 mmol of manganese acetate and 0.2 g of diatomite in Linjiang City, Jilin Province (the mass percentage of diatom shells is about 68%) to 40 mL of a mixed solution of isopropanol and glycerin (volume ratio is 3:1), at room temperature After stirring for 3 hours, the mixed solution was transferred to a polytetrafluoroethylene-lined reactor, and the reactor was placed in a constant temperature drying oven at 180° C. for 6 hours. The obtained suspension was naturally cooled to room temperature, centrifuged and washed with absolute ethanol, and the obtained precipitate was placed in a constant temperature drying oven, and dried at 80° C. for 12 hours to obtain manganese alkoxide / diatomaceous earth solid powder. The powder was placed in a muffle furnace, heated to 600 °C at a heating rate of 3 °C / min, and calcined at a constant temperature for 3 hours to obtain diatomite-supported porous bixbyite Mn 2 o 3 (Mn 2 o 3 / diatomaceous earth-600).

[0035] The catalytic...

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Abstract

A diatomite-supported porous bixbyite catalyst, a preparation method and an application thereof belong to the technical field of inorganic functional materials. In the present invention, divalent inorganic manganese salt and diatomite are used as raw materials, dissolved in a mixed solvent of glycerin and isopropanol, and manganese alkoxide is uniformly loaded on diatomite by solvothermal reaction to prepare manganese alkoxide / diatomite Diatomaceous earth-loaded porous bixbyite Mn obtained after heat treatment 2 o 3 catalyst. There are many silicon hydroxyl groups and hydrogen bonds on the surface of diatomaceous earth, making it compatible with Mn 2 o 3 A strong binding energy is formed between them. The composite not only prevents Mn 2 o 3 Agglomeration, reduction of Mn 2 o 3 The high specific surface area and strong adsorption of diatomite can also be used to achieve the targeted enrichment of benzene pollutants in the air. It can quickly catalyze the degradation of benzene at a relatively low temperature, and the removal rate of benzene is high. The invention has the characteristics of simple preparation method, low production cost, no introduction of other pollutants, etc., and broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of inorganic functional materials, and in particular relates to a diatomite-loaded porous bixbyite catalyst, a preparation method and an application thereof. Background technique [0002] Following the "soot type" and "photochemical smog type" pollution, people are currently trapped in indoor air pollution, and the problem of indoor air pollution has become a global problem that cannot be ignored. The source of indoor air pollution is volatile organic compounds (Volatile Organic Compounds referred to as VOCs), among which benzene series (benzene, toluene, xylene, etc.) are the main indoor gaseous pollutants. Benzene series have the "three hazards" of mutagenesis, teratogenicity and carcinogenicity to the human body, seriously threatening human health and the environment, and have attracted great attention from all countries in the world. The International Health Organization has designated benzene series as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J35/10B01D53/86B01D53/72
CPCB01J23/34B01J23/002B01J35/1004B01D53/8668B01D53/72B01D2257/7027B01D2257/704B01D2258/06
Inventor 邹永存金石邹晓新
Owner JILIN UNIV
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