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Macromolecular surface modified gamma-Fe2O3/diatomite catalyst, preparation method and application thereof

A surface modification and surfactant technology, which is applied in the field of polymer surface modification γ-Fe2O3/diatomite catalyst and its preparation, can solve the problems of poor catalytic activity improvement, diatomite pore blockage, and structural damage. , to achieve the effect of avoiding secondary pollution of ozone, not easy to deposit carbon and deactivate, and increasing recovery

Active Publication Date: 2021-08-20
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above work content shows that the adsorption performance of organic matter and metal ions can be improved by modifying diatomite. However, if it is used as a catalyst carrier, the metal oxide / diatomite catalyst prepared by the traditional impregnation method often has a large amount of metal oxide. Agglomeration leads to problems such as diatomite pore blockage, structural damage, and poor catalytic activity improvement effect

Method used

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  • Macromolecular surface modified gamma-Fe2O3/diatomite catalyst, preparation method and application thereof
  • Macromolecular surface modified gamma-Fe2O3/diatomite catalyst, preparation method and application thereof
  • Macromolecular surface modified gamma-Fe2O3/diatomite catalyst, preparation method and application thereof

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Effect test

Embodiment 1

[0036]Dissolve 4.04g of ferric nitrate nonahydrate, 2.22g of PVP and 6g of refined diatomaceous earth in 9.4g of ethylene glycol solution, heat, stir and reflux at 80°C for 10h after ultrasonication for 20min to generate Sol A, and then dissolve Sol A Dry in a vacuum oven at 80°C for 12 hours to obtain a xerogel. After the dry gel was crushed, it was placed in a muffle furnace, the temperature was raised to 300°C at 5°C / min, and calcined for 120min. After the calcination, the product was taken out after the muffle furnace was cooled to room temperature, washed alternately with absolute ethanol and deionized water for 4 times after grinding, and then vacuum-dried at 60°C for 12 hours to obtain the target product.

[0037] The 10%-γ-Fe prepared above 2 o 3 -PVP 2 / diatomite catalyst is used for low-temperature plasma catalytic degradation of styrene, the reaction conditions are: the catalyst is packed in a dielectric barrier reactor, the catalyst loading is 0.1g, and the styr...

Embodiment 2

[0039] Dissolve 4.04g of ferric nitrate nonahydrate, 3.33g of PVP and 3g of refined diatomaceous earth in 9.4g of ethylene glycol solution, heat, stir and reflux at 82°C for 9.5h after ultrasonication for 20min to generate Sol A, and then dissolve the sol A was dried in a vacuum oven at 80°C for 12 hours to obtain a xerogel. After the dry gel was crushed, it was placed in a muffle furnace, the temperature was raised to 330°C at 5°C / min, and it was calcined for 110min. After the calcination, the product was taken out after the muffle furnace was cooled to room temperature, washed alternately with absolute ethanol and deionized water for 4 times after grinding, and then vacuum-dried at 60°C for 12 hours to obtain the target product.

[0040] The 20%-γ-Fe prepared above 2 o 3 -PVP 3 / diatomite catalyst is used for low-temperature plasma catalytic degradation of styrene, the reaction conditions are: the catalyst is packed in a dielectric barrier reactor, the catalyst loading is...

Embodiment 3

[0042] Dissolve 4.04g of ferric nitrate nonahydrate, 4.84g of CMC and 3g of refined diatomaceous earth in 12.41g of ethylene glycol solution, heat, stir and reflux at 80°C for 10h after ultrasonication for 20min to generate Sol A, and then dissolve Sol A Dry in a vacuum oven at 80°C for 12 hours to obtain a xerogel. After the dry gel was crushed, it was placed in a muffle furnace, the temperature was raised to 300°C at 5°C / min, and calcined for 120min. After the calcination, the product was taken out after the muffle furnace was cooled to room temperature, washed alternately with absolute ethanol and deionized water for 4 times after grinding, and then vacuum-dried at 60°C for 12 hours to obtain the target product.

[0043] The 20%-γ-Fe prepared above 2 o 3 -CMC 2 / diatomite catalyst is used for low-temperature plasma catalytic degradation of styrene, the reaction conditions are: the catalyst is packed in a dielectric barrier reactor, the catalyst loading is 0.1g, and the s...

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Abstract

The invention relates to a macromolecularsurface modified gamma-Fe2O3 / diatomite catalyst, a preparation method and application thereof. According to the preparation method, a sol-gel-roasting method is taken as a basic process, ferric nitrate nonahydrate is taken as Fe<3+>, ethylene glycol is taken as a solvent, and amacromolecularsurfactant is one or at least two of polyvinylpyrrolidone, carboxymethyl cellulose and hexadecyl trimethyl ammonium bromide. The preparation method is simple in process, high in operability, short in preparation period, high in yield and easy to realize industrial production. The catalyst prepared by the method cooperates with low-temperature plasma to realize efficient volatile organic compound degradation efficiency and O3 decomposition efficiency, and has high catalytic activity and good stability.

Description

technical field [0001] The invention relates to a polymer surface modified γ-Fe 2 o 3 The diatomite catalyst and its preparation method and application belong to the technical field of magnetic diatomite preparation. [0002] technical background [0003] At present, our country is facing PM 2.5 and O 3 The double pressure of pollution, and volatile organic compounds (Volatile organic compounds, VOCs) is an important factor causing these two serious air pollution problems. Therefore, the effective control of VOCs emissions is the key to alleviating the current air pollution problems. Compared with the traditional VOCs treatment technology, the application of low-temperature plasma technology in VOCs treatment has the advantages of short residence time, simple operation, small footprint, wide selectivity, and mild reaction conditions, which makes it a promising prospect in practical application. But for now, the low-temperature plasma technology still has high energy cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01D53/86B01D53/72B01D53/66
CPCB01J23/745B01D53/8668B01D53/8675Y02A50/20
Inventor 李溪王诗雯徐炎华于鹏张潇徐宝康
Owner NANJING UNIV OF TECH
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