scholarly journals Experimental Study of the Liquid Cathode Components Transfer to the DC Discharge Plasma at Atmospheric Pressure

2016 ◽  
Vol 3 (3) ◽  
pp. 131-135 ◽  
Author(s):  
N. A. Sirotkin ◽  
V. A. Titov
Keyword(s):  
Gas Phase ◽  
Atmospheric Pressure ◽  
Discharge Plasma ◽  
Voltage Drop ◽  
Transfer Coefficients ◽  
Cathode Voltage ◽  
Cathode Voltage Drop ◽  
Liquid Cathode ◽  
Transfer Processes ◽  
Dc Discharge

The transfer processes of solvent and dissolved substances in gas phase from aqueous solutions used as cathodes under the action of atmospheric pressure DC discharge were investigated.The electric field strength in plasma (E), cathode voltage drop (Uc) and rates of solution evaporation were measured. The transfer coefficients were calculated. The effect of transfer processes on plasma physical properties was experimentally studied. The threshold characteristics of cations transfer process were determined.

Oxidative Removal of Elemental Mercury in Flue Gas by DBD Discharge Plasma

2012 ◽  
Vol 518-523 ◽  
pp. 2621-2624 ◽  
Author(s):  
Yu Ze Jiang ◽  
Jiu Tao An ◽  
Ke Feng Shang ◽  
Na Lu ◽  
Jie Li ◽  
...  
Keyword(s):  
Gas Phase ◽  
Residence Time ◽  
Flue Gas ◽  
Applied Voltage ◽  
Atmospheric Pressure ◽  
Discharge Plasma ◽  
Elemental Mercury ◽  
Experimental Results ◽  
Dbd Plasma ◽  
Oxidation Efficiency

Oxidation of gas phase elemental mercury (Hg0) in the simulated flue gas by DBD plasma under atmospheric pressure and ambient temperature (298 K) was conducted. Experimental results indicated that the oxidative efficiency of Hg0 increased with O2 content, the residence time of flue gas in reactor and the applied voltage. The oxidation efficiency of Hg0 reached over 96% under the applied voltage of 11 kV and the residence time of 0.24 s when the O2 content in flue gas was 20%, and the corresponding energy efficiency was at about 14.1 μg kJ-1. It was noted that the oxidation efficiency of Hg0 could still reach 80% when the O2 content in flue gas was only 4% (near the actual O2 content in flue gas of coal-fired boilers). The experimental results indicated that DBD plasma was one of the efficient technologies for purification of Hg0 vapor industrial flue gas.

scholarly journals IMPACT OF TRANSFER PROCESSES OF LIQIUD CATHODE COMPONENTS ON PHYSICAL-CHEMICAL PARAMETERS OF ATMOSPHERIC PRESSURE DC DISCHARGE

2017 ◽  
Vol 60 (6) ◽  
pp. 52
Author(s):  
Anton L. Kulentsan ◽  
Dmitriy A. Shutov ◽  
Vladimir V. Rybkin
Keyword(s):  
Electric Fields ◽  
Discharge Current ◽  
Atmospheric Pressure ◽  
Positive System ◽  
Chemical Parameters ◽  
Transfer Processes ◽  
Physical Chemical ◽  
Metal Atoms ◽  
Dc Discharge ◽  
Field Strengths

Experimental data on glow discharge parameters of atmospheric pressure in air with cathodes from distilled water and water containing ions of potassium, sodium and copper (II) are obtained. Chlorides of the corresponding salts were used. The current range was 20-60 mA, and the solution concentrations were -0.1-0.4 mol/l. The cathode drops of the potential and the electric fields in the plasma are determined by the mobile anode method. With emission spectroscopy by modeling the unresolved rotational structure of the emission bands of the second positive system of nitrogen molecules, gas temperatures were found. On the basis of these data, the total concentrations of the particles, the reduced electric field strengths, were found. It is found that the increase in the discharge current leads to a decrease in the cathode drops of the potential, the strengths of the electric fields, and the reduced field strengths. At the same time, the temperature of the gas was practically independent on the discharge current and it was 1600 ± 150 K. By numerical solution of the Boltzmann equation for electrons, electron energy distribution functions, mean energies and electron concentrations and rate constants of the processes occurring under the action of electron impact were determined. An estimate is made of the contribution to the formation of charged particles in the plasma of ionization processes of metal atoms that appear in the gas phase as a result of non-equilibrium transfer from the liquid cathode. It is shown that for molar fractions of metal atoms of 10-4 and higher, ionization is completely determined by collisions of electrons with metal atoms, rather than with molecules of the main plasma-forming gas. It is also shown that discharges with cathodes containing salt solutions have smaller values of cathode potential drops.Forcitation:Kuletsan A.L., Shutov D.A., Rybkin V.V. Impact of transfer processes of liqiud cathode components on physical-chemical parameters of atmospheric pressure dc discharge. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 6. P. 52-58.

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