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A kind of purification equipment and purification method of photocatalyst and volatile organic compound

A technology of photocatalyst and purification equipment, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of low degradation and mineralization activity, easy deactivation, desorption and secondary pollution, etc., to achieve High degradation and mineralization efficiency, simple optimization of preparation process, and improved utilization

Active Publication Date: 2021-08-13
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although physical methods represented by activated carbon adsorption perform well enough for the purification of alkane VOCs, they face secondary pollution problems such as adsorption saturation of the adsorbent and difficulty in desorption.
The biological method also has disadvantages such as complicated process maintenance, high requirements on environmental stability, and poor treatment effect on hydrophobic alkanes VOCs.
Although the chemical method represented by advanced oxidation can also degrade most of the VOCs in industrial waste gas, its technology is single, and the degradation efficiency of alkane VOCs is not very ideal
This is mainly because compared with other types of VOCs, the bond energy of C-C and C-H bonds in alkane VOCs is relatively high, and it takes a longer reaction time to break them. 2 Photocatalysts with low degradation and mineralization activity and easy deactivation

Method used

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  • A kind of purification equipment and purification method of photocatalyst and volatile organic compound
  • A kind of purification equipment and purification method of photocatalyst and volatile organic compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Preparation of photocatalyst

[0030] (1) Manganese sulfate, TiO 2 Mix with water at a mass ratio of 1: 10: 20, and after ultrasonication for 30 minutes, a transparent first mixed solution is obtained;

[0031] (2) Stir the first mixed solution at a speed of 50 rpm for 200 min to obtain the second mixed solution;

[0032] (3) Put the foamed nickel into the second mixed solution, soak it for 120min, seal the wetted nickel foam with tinfoil and react at 40°C for 5h to obtain Mn-doped TiO 2 The composite material is supported on the surface of nickel foam to form a photocatalyst.

[0033] 2. Build equipment for volatile organic compounds

[0034] Such as figure 1 As shown, the purification equipment of the present invention includes: a photocatalytic reactor, an ozone supply system, a sample supply system and an ultraviolet lamp tube, the photocatalytic reactor is a hollow structure, and a photocatalyst is loaded on its inner wall, and the ultraviolet lamp tube It ...

Embodiment 2

[0053] 1. Preparation of photocatalyst

[0054] (1) Cobalt chloride, TiO 2 Mix with water at a mass ratio of 1: 100: 100, and after ultrasonication for 5 minutes, a transparent first mixed solution is obtained;

[0055] (2) Stir the first mixed solution at a speed of 100 rpm for 30 minutes to obtain the second mixed solution;

[0056] (3) Put the foam ceramics into the second mixed solution, soak for 720min, seal the wet foam ceramics with tinfoil paper and react at 300°C for 20h to obtain Co-doped TiO 2 The composite material is supported on the surface of the foamed ceramics to form a photocatalyst.

[0057] 2. Build equipment for volatile organic compounds

[0058] The difference between this step and Example 1 is that the photocatalyst is Co-doped TiO 2 Composite material; other places are basically similar to embodiment 1, and will not be repeated here.

[0059] It has been determined that using the equipment of this embodiment, the average removal rate of volatile o...

Embodiment 3

[0064] 1. Preparation of photocatalyst

[0065] (1) Ferric nitrate, TiO 2 Mix with water at a mass ratio of 1: 10: 50, and obtain a transparent first mixed solution after ultrasonication for 60 min;

[0066] (2) Stir the first mixed solution at a speed of 10 rpm for 360 min to obtain the second mixed solution;

[0067] (3) Put the foamed carbon material into the second mixed solution, soak it for 30 minutes, seal the wet foamed carbon material with tinfoil paper and react at 100°C for 1 hour to obtain Fe-doped TiO 2 The photocatalyst formed on the surface of the composite material loaded on the foamed carbon material.

[0068] 2. Build equipment for volatile organic compounds

[0069] The difference between this step and Example 1 is that the photocatalyst is Fe-doped TiO 2 Composite material; other places are basically similar to embodiment 1, and will not be repeated here.

[0070] It has been determined that using the equipment of this embodiment, the average removal r...

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Abstract

The application belongs to the technical field of industrial waste gas purification, and in particular relates to a photocatalyst and volatile organic compound purification equipment and a purification method thereof. The photocatalyst provided by the present invention is a titanium dioxide composite photocatalyst doped with manganese, cobalt, iron, copper or zinc. Not only the preparation process is simple and optimized, but also it can efficiently degrade the volatile organic compounds of alkanes, and the degradation time is short, so it can be applied to alkanes In the purification of volatile organic compounds. The purification equipment for alkane volatile organic compounds provided by this application includes an ultraviolet lamp, an ozone supply system and a photocatalyst, and utilizes the synergistic effect of ultraviolet light, ozone and photocatalyst; the alkane volatile organic compounds are fully contacted with the photocatalyst, greatly improving the UV The utilization rate of light and ozone integrates degradation, mineralization, and stability. Even low-concentration alkane volatile organic compounds have high degradation and mineralization efficiency, and the operation is simple.

Description

technical field [0001] The invention belongs to the technical field of industrial waste gas purification, and in particular relates to a photocatalyst and volatile organic compound purification equipment and a purification method thereof, in particular to a volatile organic compound purification method. Background technique [0002] With the rapid development of industry, air pollution is becoming more and more serious. Volatile organic compounds (VOCs) are an important class of air pollutants. They can not only form secondary pollutants through photochemical reactions, but also are important precursors of fine particles. Some of these VOCs are also carcinogenic to humans. Alkane VOCs are a major class of VOCs, and are also important pollutants in the petrochemical industry. They are extremely toxic to workers and surrounding residents. Therefore, how to effectively eliminate alkane VOCs pollution is currently a hot topic in international research. [0003] Common treatment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J23/75B01J23/745B01D53/86B01D53/74B01D53/44
CPCB01D53/74B01D53/8668B01D2255/802B01D2257/7022B01D2257/708B01J23/745B01J23/75B01J23/8892B01J35/004
Inventor 李彦旭卫鹏陈江耀安太成李桂英
Owner GUANGDONG UNIV OF TECH
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