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Device and method for realizing dielectric barrier discharge in in-situ pool of in-situ infrared analysis device

A dielectric barrier discharge and analysis device technology, applied in the field of analysis and detection, can solve the problems of mechanism research obstacles, unclear substances formed, and few studies on intermediate substances, etc., and achieve the effect of fast and simple discharge process and infrared spectrum analysis process

Active Publication Date: 2019-01-29
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, there are not many studies on the intermediate substances of active chemical species and reactants produced by these discharges. For example, plasma-coupled catalysts remove PM, VOCs and other pollutants. On the active site of the active site, but what kind of substance is formed and what kind of group is not clear, so that the use of plasma to remove carbon particles, VOCs and NO X Mechanistic studies such as

Method used

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  • Device and method for realizing dielectric barrier discharge in in-situ pool of in-situ infrared analysis device
  • Device and method for realizing dielectric barrier discharge in in-situ pool of in-situ infrared analysis device
  • Device and method for realizing dielectric barrier discharge in in-situ pool of in-situ infrared analysis device

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Embodiment 1

[0058] In this example, the electrode Ⅰ and electrode Ⅱ are made of stainless steel, the insulating tube is made of quartz glass, the electrode Ⅱ is a square plate with no holes, and two high-temperature-resistant circular aluminum oxide gaskets with a thickness of 0.5 mm are placed under the electrode Ⅱ. Thus, the thickness of the sample is 2 mm, and the distance between electrode I and electrode II is 2.5 mm.

[0059] In actual use, the steps are as follows:

[0060] (1) The electrode I1 and the electrode II16 are respectively connected to the high-voltage power supply through the wire I10 and the wire II11, and the wire II11 is grounded at the same time.

[0061] (2) The high-voltage output from the high-voltage power supply is loaded on the electrode I1 and the electrode II16, so that the discharge space above the sample between the electrode I1 and the electrode II16 forms an electric field, and the gas in the discharge space is ionized to generate electrons and ions . ...

Embodiment 2

[0066] Putting Al in the in situ pool 2 o 3 Catalyst, feed CO 2 After adsorption, the catalyst is discharged and regenerated. The purpose is to observe the Al in the discharge plasma field 2 o 3 Changes on the surface of the catalyst, thus inferring that the Al 2 o 3 Reaction mechanism of catalyst regeneration.

[0067] When using it specifically, the steps are as follows:

[0068] (1) Al 2 o 3 The catalyst powder is installed in the sample cell, the surface of the sample is smeared flat, and the gas temperature in the in-situ cell is controlled at 25°C (controlled by a thermostat); the electrode I10 and the electrode II16 are connected to the high-voltage power supply through the metal stainless steel wire I21 and the metal stainless steel wire II22 respectively. Connection, the metal stainless steel wire Ⅱ22 is grounded at the same time.

[0069] (2) In the in-situ cell, the total flow rate of gas is 50mL / min helium for 10min, and the background spectrum is collect...

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Abstract

The invention discloses a device and method for realizing dielectric barrier discharge in an in-situ pool of an in-situ infrared analysis device. The device comprises the following parts: a high voltage power supply; an infrared spectrometer; an in-situ pool, comprising a base, a sample pool located on the base, and a conical dome covered above the sample pool, wherein the base is also provided with gas inlet and outlet, the conical dome is provided with an entrance window, an exit window and an observation window, and the infrared light enters the sample pool through the entrance window, andexits from the exit window after being reflected and partially refracted; and a dielectric barrier discharge assembly, comprising an insulating sleeve extending above the sample pool in the conical dome, an electrode I inserted into the insulating sleeve, and an electrode II disposed at the bottom of the sample pool, wherein the electrode I and the electrode II are connected with the high voltagepower supply. The invention performs infrared spectrum analysis while realizing the plasma discharge, without affecting the analysis result, which solves the uncertain factors which may affect the sample in the previous sample transfer process, and makes the discharge process and the infrared spectrum analysis process quick and easy.

Description

technical field [0001] The invention relates to the field of analysis and detection, in particular to a device and method for realizing dielectric barrier discharge in an in-situ cell of an in-situ infrared analysis device. Background technique [0002] Plasma is the fourth state of matter besides gas, liquid and solid. As energy levels increase, the state of matter can change from solid to liquid, to gas, and finally to plasma. The forms of low-temperature plasma generated by gas discharge mainly include glow discharge, corona discharge, microwave discharge, and dielectric barrier discharge. The basic process of gas discharge: 1) electrons cause gas breakdown; 2) start to transmit current; 3) electrochemical reaction occurs in the electric field, gas molecules (O 2 、H 2 O, etc.) absorb the energy of electrons to form free radicals (O, OH, etc.); 4) Free radicals with strong oxidation activity cause or participate in a series of chemical reactions in the electric field. ...

Claims

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Application Information

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IPC IPC(8): G01N21/35G01N21/01
CPCG01N21/01G01N21/35
Inventor 姚水良张欢欢陈挚宗韩寿山林航昊沈一平
Owner ZHEJIANG GONGSHANG UNIVERSITY