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A kind of intermittent photoreactor and application thereof for vocs heterogeneous reaction

A technology of photoreactors and reactors, applied in the direction of instruments, scientific instruments, chemical instruments and methods, etc., can solve problems such as poor repeatability, easy volatilization of reactants, and difficulty in researching complex environmental factors, and achieve good mass balance and equilibrium time Short, flexible and convenient operation

Active Publication Date: 2022-04-22
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a batch photoreactor for heterogeneous reaction of VOCs, which is used to solve the problem of volatilization and poor repeatability of the reactants in the continuous heterogeneous reaction device in the study of heterogeneous reactions of VOCs. Difficulty in researching complex environmental factors

Method used

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  • A kind of intermittent photoreactor and application thereof for vocs heterogeneous reaction
  • A kind of intermittent photoreactor and application thereof for vocs heterogeneous reaction
  • A kind of intermittent photoreactor and application thereof for vocs heterogeneous reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The intermittent photoreactor for VOCs heterogeneous reaction described in the present invention, such as figure 1 As shown, including oxidizing gas bottle 1, reducing gas bottle 2, gas mass flow meter 3, constant temperature water bath 4, gas washing bottle 5, mixing bottle 6, humidity probe 7, quartz reactor 8, and light aging test 9 boxes , Light source 10, exhaust gas collection bottle 11, exhaust gas collection bottle 12. The oxidizing gas cylinder 1 and the reducing gas cylinder 2 are connected to the gas mass flowmeter 3 through the valve I, and the valve II is connected to the gas mass flowmeter 3, and the gas mass flowmeter 3 is connected to the quartz reactor 8 through the valve VI. In addition, the gas mass flowmeter 3 is connected to the valve IV Connect with mixing bottle 6 (humidity probe 7 is housed), then connect with quartz reactor 8 through valve VII, in addition, gas mass flowmeter 3 is connected with gas washing bottle 5 in constant temperature water...

Embodiment 2

[0061] Using the device in Example 1, the batch reaction experiment was carried out on the heterogeneous reaction of VOCs mediated by environmental media, which specifically included the following steps:

[0062] The pretreatment of the black carbon sample in the environmental medium is to mix 160mg rice black carbon with deionized water by solid-liquid ratio w / w=1:10, and use vacuum filtration to evenly filter the black carbon sample to 4 filter membranes. Vinyl fluoride membrane, diameter 4.7mm), then place the filter membrane on a quartz support in a heterogeneous photoreactor, and dry it under vacuum conditions at 150°C for 6h to remove the contained moisture, and transfer it after cooling into a quartz reactor. Subsequently, the interface of the reactor is sealed by grinding and then connected to the heterogeneous reaction system.

[0063] Described heterogeneous photoreaction is at 25 ℃, 8%RH, 40%RH, air atmosphere, visible light (illumination intensity Ee=1000w / m 2 ),...

Embodiment 3

[0068] Using the device in Example 1, the batch reaction experiment was carried out on the heterogeneous reaction of VOCs mediated by environmental media, which specifically included the following steps:

[0069] For the pretreatment of environmental medium black carbon samples, 160mg corn black carbon and deionized water are mixed according to the solid-to-liquid ratio w / w=1:10, and the black carbon samples are evenly sucked to 4 filter membranes (poly-four Vinyl fluoride membrane, diameter 4.7mm), then place the filter membrane on a quartz support in a heterogeneous photoreactor, and dry it under vacuum conditions at 150°C for 6h to remove the contained moisture, and transfer it after cooling into a quartz reactor. Subsequently, the interface of the reactor is sealed by grinding and then connected to the heterogeneous reaction system.

[0070] Described heterogeneous photoreaction is at 25 ℃, 8%RH, air atmosphere, visible light (illumination intensity Ee=200w / m 2 , Ee=500w...

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Abstract

The invention discloses a batch-type photoreactor for VOCs heterogeneous reaction, which includes a quartz reactor in a light aging test box, a porous quartz support is arranged in the quartz reactor, and a filter membrane carrying an environmental medium is placed on the On the quartz support; the quartz reactor is provided with a liquid sample inlet, and a groove for containing VOCs is arranged directly below it; the batch photoreactor also includes a gas source, a gas scrubber containing distilled water and a gas The mixer, the gas source and the gas mixer are respectively connected to the quartz reactor. Also disclosed is an experimental method for performing environmental medium-mediated VOCs heterogeneous reaction based on the device. The device and method of the present invention adopt a batch-type reaction system, which can conduct research on the heterogeneous photoreaction of VOCs mediated by simulated atmospheric particles, realize single or composite research on environmental factors, and have good experimental repeatability and high mass balance. .

Description

technical field [0001] The invention belongs to the technical field of atmospheric heterogeneous photocatalysis and gas phase VOCs treatment, and relates to an experimental device for VOCs heterogeneous reaction research, in particular to a batch photoreactor, and the reactor simulates volatile organic The application of pollutants in the degradation and transformation of the atmosphere. Background technique [0002] Volatile organic compounds (Volatile organic compounds, referred to as VOCs) are atmospheric ozone (O 3 ) and secondary organic aerosols (SOA), which mainly come from the production industries containing VOCs raw materials such as petroleum refining and petrochemical, coal processing and conversion, which are emitted by human sources. It mainly includes the following categories: hydrocarbons, oxygen-containing organic compounds, organic halides, and nitrogen-containing and sulfur-containing organic compounds. The massive emission of VOCs is the cause of my cou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/00G01N33/00B01D53/44
CPCB01D53/8687B01D53/007G01N33/00B01D2259/802B01D2259/804B01D2257/708
Inventor 朱东强王敏丽魏晨辉李明会周欣伟刘慧许凡超高涵候吉妃瞿晓磊付翯云郑寿荣
Owner NANJING UNIV
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