Experimental and theoretical study of the effect of gas flow on gas temperature in an atmospheric pressure microplasma

Appling a high voltage to the dielectric barrier discharge device in a coaxial geometry in flowing argon, a uniform plasma plume is generated at one atmospheric pressure. The waveforms of discharge current and the applied voltage are investigated and results indicate that both the intensity and duration width of the discharge current pulse increase with increasing the applied voltage. The gas temperature of the plasma plume is investigated by using an infrared thermometer. The gas temperature of the plasma plume are functions of gas flow rate, peak value and the frequency of the applied voltage. Results show that the gas temperature increases with increasing the applied voltage or its frequency, while it decreases with increasing the gas flow rate. A qualitative explanation is given for the variance of gas temperature as functions of the experimental parameters by analyzing the waveforms of the discharge current and the applied voltage.

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Electrical and Spectroscopic Diagnostics of Atmospheric Pressure DBD Plasma Jet

Journal of Bangladesh Academy of Sciences ◽

10.3329/jbas.v40i1.28322 ◽

2016 ◽

Vol 40 (1) ◽

pp. 23-36

Author(s):

NC Roy ◽

MR Talukder

Keyword(s):

Flow Rate ◽

Applied Voltage ◽

Atmospheric Pressure ◽

Gas Flow ◽

Optical Emission ◽

Plasma Jet ◽

Diagnostic Techniques ◽

Gas Temperature ◽

Gas Flow Rate ◽

Dbd Plasma

Atmospheric pressure capillary dielectric barrier oxygen discharge plasma jet is developed to generate nonthermal plasma using unipolar positive pulse power supply. Both electrical and optical diagnostic techniques were used to characterize the produced plasma as functions of applied voltage and gas flow rate. Electrical diagnostics indicated that the discharge frequency decreased with gas flow rate but increased with the applied voltage. Analytical results obtained from the optical emission spectroscopic data revealed the gas temperature, excitation temperature and electron density. Gas temperature was found to decrease with increasing oxygen flow rate but increase linearly with applied voltage. The produced plasma was applied preliminarily to study the inactivation yield of Fusarium oxysporum fungus infected potato samples.Journal of Bangladesh Academy of Sciences, Vol. 40, No. 1, 23-36, 2016

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Theoretical Study of Plasma Parameters Dependence on Gas Temperature in an Atmospheric Pressure Argon Microwave Discharge

10.1063/1.2909133 ◽

2008 ◽

Author(s):

M. Pencheva ◽

E. Benova ◽

I. Zhelyazkov ◽

Hans-Jürgen Hartfuss ◽

Michel Dudeck ◽

...

Keyword(s):

Atmospheric Pressure ◽

Theoretical Study ◽

Microwave Discharge ◽

Gas Temperature ◽

Plasma Parameters

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Atmospheric Pressure Plasma Deposition of TiO2: A Review

Materials ◽

10.3390/ma13132931 ◽

2020 ◽

Vol 13 (13) ◽

pp. 2931

Author(s):

Soumya Banerjee ◽

Ek Adhikari ◽

Pitambar Sapkota ◽

Amal Sebastian ◽

Sylwia Ptasinska

Keyword(s):

Atmospheric Pressure ◽

Gas Flow ◽

Plasma Deposition ◽

Atmospheric Pressure Plasma ◽

Cost Savings ◽

Historical Background ◽

Pressure Plasma ◽

Wide Range ◽

The Status ◽

Deposition Techniques

Atmospheric pressure plasma (APP) deposition techniques are useful today because of their simplicity and their time and cost savings, particularly for growth of oxide films. Among the oxide materials, titanium dioxide (TiO2) has a wide range of applications in electronics, solar cells, and photocatalysis, which has made it an extremely popular research topic for decades. Here, we provide an overview of non-thermal APP deposition techniques for TiO2 thin film, some historical background, and some very recent findings and developments. First, we define non-thermal plasma, and then we describe the advantages of APP deposition. In addition, we explain the importance of TiO2 and then describe briefly the three deposition techniques used to date. We also compare the structural, electronic, and optical properties of TiO2 films deposited by different APP methods. Lastly, we examine the status of current research related to the effects of such deposition parameters as plasma power, feed gas, bias voltage, gas flow rate, and substrate temperature on the deposition rate, crystal phase, and other film properties. The examples given cover the most common APP deposition techniques for TiO2 growth to understand their advantages for specific applications. In addition, we discuss the important challenges that APP deposition is facing in this rapidly growing field.

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Influence of gas flow on argon microwave plasma jet at atmospheric pressure

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2011.09.013 ◽

2011 ◽

Vol 206 (6) ◽

pp. 1449-1453 ◽

Cited By ~ 6

Author(s):

Shouichiro Iio ◽

Kosuke Yanagisawa ◽

Chizuru Uchiyama ◽

Katsuya Teshima ◽

Naomichi Ezumi ◽

...

Keyword(s):

Atmospheric Pressure ◽

Gas Flow ◽

Microwave Plasma ◽

Plasma Jet

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Microwave Torch Plasmas for Decomposition of Gaseous Pollutants

Journal of Advanced Oxidation Technologies ◽

10.1515/jaots-2004-0106 ◽

2004 ◽

Vol 7 (1) ◽

Cited By ~ 1

Author(s):

Mariusz Jasiński ◽

Jerzy Mizeraczyk ◽

Zenon Zakrzewski

Keyword(s):

Atmospheric Pressure ◽

Energy Cost ◽

Gas Flow ◽

Coaxial Line ◽

Low Energy ◽

Gaseous Pollutants ◽

Gas Flow Rate ◽

Torch Discharge ◽

Volatile Organic ◽

Moderate Power

AbstractResults of the study of decomposition of volatile organic compounds (VOCs including Freons) in their mixtures with either synthetic air or nitrogen, and nitrogen oxides NOx in their mixtures with N2 or Ar in low (~ 100 W) and moderate-power (200-400 W) microwave torch plasmas at atmospheric pressure are presented. Three types of microwave torch discharge (MTD) generators, i.e. the low-power coaxial-line-based MID, the moderate-power waveguide-based coaxial-line MTD and the moderate-power waveguide-based MTD generators were used. The gas flow rate and microwave power (2.45 GHz) delivered to the discharge were in the range of 1÷3 l/min and 100÷ 400 W, respectively. Concentrations of the processed gaseous pollutants usually were from several up to several tens percent. The energy efficiency of decomposition of several gaseous pollutants reached 1000 g/kWh. It was found that the microwave torch plasmas fully decomposed the pollutants at relatively low energy cost. This suggests that the MTD plasma can be a useful tool for decomposition of highly-concentrated gaseous pollutants.

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