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Method for catalytically degrading chlorobenzene by double-stage discharge plasma and preparation method of used catalyst

A discharge plasma and catalytic degradation technology, applied in the field of chlorobenzene degradation, can solve problems such as incomplete decomposition of chlorobenzene, and achieve the effects of thorough purification, high catalytic activity and rapid chemical reaction

Inactive Publication Date: 2020-11-13
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem of incomplete decomposition when low-temperature plasma removes chlorobenzene, the present invention provides a method for catalytically degrading chlorobenzene with double-stage discharge plasma and a preparation method for the catalyst used. The low-temperature plasma has the advantages of low energy consumption, rapid chemical reaction, thorough purification, and wide applicability, and also makes up for its lack of selectivity for the pollutants it treats, effectively reducing the generation of by-products and improving CO 2 Selectivity and removal of pollutants

Method used

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  • Method for catalytically degrading chlorobenzene by double-stage discharge plasma and preparation method of used catalyst
  • Method for catalytically degrading chlorobenzene by double-stage discharge plasma and preparation method of used catalyst
  • Method for catalytically degrading chlorobenzene by double-stage discharge plasma and preparation method of used catalyst

Examples

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Effect test

Embodiment 1

[0032] (1) Preparation of Co-Mn / TiO 2 Catalyst: Dissolve 0.29 g of manganese nitrate and 0.29 g of cobalt acetate in 50 mL of distilled water and stir to form a homogeneous solution, slowly mix 2 g of TiO 2 Add the powder to the above solution, and stir at 35~40°C for 2 h, slowly add 25 mL Na 2 CO 3 solution (0.2 mol / L), the precipitate was stirred for 4 h, then filtered and washed with deionized water until neutral, dried overnight at 80 °C, and calcined at 350 °C (3 °C / min) for 5 h in a muffle furnace. Get Co-Mn / TiO 2 catalyst. The resulting Co-Mn / TiO 2 The SEM and TEM images of the catalyst are as Image 6 As shown, the XRD pattern is as Figure 7 As can be seen from the figure, Co-Mn / TiO 2 The specific surface of the catalyst is 51.03 m 2 / g, the metal oxide is evenly distributed on TiO 2 surface.

[0033] (2) Catalytic degradation of chlorobenzene: the distance between the discharge intervals of the double-stage discharge plasma is 1 cm, the length of each disc...

Embodiment 2

[0035] The difference from Example 1 is that the peak voltage of the plasma is 14 kV.

Embodiment 3

[0037] The difference from Example 1 is that the peak voltage of the plasma is 16 kV.

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Abstract

The invention relates to a method for degrading chlorobenzene, and provides a method for catalytically degrading the chlorobenzene by using double-section discharge plasma aiming at the problem of incomplete decomposition when the chlorobenzene is removed by using low-temperature plasma. The discharge interval distance of the double-section discharge plasma is less than or equal to 10cm, 0.1-0.3 gof a catalyst is placed in each of two discharge areas of a reactor, the chlorobenzene is entrained in air at the concentration of 200-400 mg / m < 3 > and introduced into the reactor, a power supply of the reactor is turned on for discharging, the peak voltage is 13-17 kV, and the chlorobenzene stays in the discharge areas for 1-3 s for degradation. The advantages of low energy consumption, rapidchemical reaction, thorough purification, wide applicability and the like of the low-temperature plasma are utilized, the defect that the low-temperature plasma lacks selectivity for treated pollutants is overcome, by-products are effectively reduced, and the CO2 selectivity and the pollutant removal rate are increased. The invention also provides a preparation method of the catalyst.

Description

technical field [0001] The invention relates to a method for degrading chlorobenzene, in particular to a method for catalytically degrading chlorobenzene with double-stage discharge plasma and a preparation method for the catalyst used. Background technique [0002] Due to the rapid development of modern construction and urban and rural industries, more and more volatile organic pollutants (Volatileorganic compounds, VOCs) are discharged into the environment, and chlorobenzene is one of the most typical pollutants. Chlorobenzene is widely used in various industrial applications. When released into the environment, it will pollute soil and water resources and seriously threaten human health. Long-term exposure to chlorobenzene will have adverse effects on the central nervous system. Chlorobenzene is chemically stable and difficult to degrade. Even if it is partially degraded by physical, chemical or biological processes, the degradation process will also produce accumulation ...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/70B01D53/88B01J23/889
CPCB01D53/8662B01D53/88B01J23/8892B01D2259/818
Inventor 姜理英张瑜芬黄武姚志伟
Owner ZHEJIANG UNIV OF TECH
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