Publication detail

Chemical Efficiency of H2O2 Production and Decomposition of Organic Compounds under Action of DC Underwater Discharge in Gas Bubbles

NĚMCOVÁ, L. NIKIFOROV, A. LEYS, C. KRČMA, F.

Original Title

Chemical Efficiency of H2O2 Production and Decomposition of Organic Compounds under Action of DC Underwater Discharge in Gas Bubbles

English Title

Chemical Efficiency of H2O2 Production and Decomposition of Organic Compounds under Action of DC Underwater Discharge in Gas Bubbles

Type

journal article - other

Language

en

Original Abstract

The underwater discharge generated by DC voltage in gas bubbles was studied. This contribution presents investigation of chemical efficiency of electric discharge in NaH2PO4.2H2O solution in range of the applied voltages 1.7-2.7 kV and discharge currents of 10-30 mA. Plasma is generated in Air, Ar, He and N2 gases. It is shown that maximal concentration of hydrogen peroxide produced in different gases does not depend on gas composition. Highest energy consumption of H2O2 generation is achieved in Air discharge and it decreases up to 50% in He plasma. Destruction of Direct Blue 106 with initial concentration of 20 mg/l as model organic pollutant by underwater discharge is carried out in second part of the paper. Decomposition of the dye is linearly dependent on the discharge current. Maximal efficiency of the dye destruction of 65% is observed in N2 discharge after 20 minutes of treatment at the current of 30 mA. Different mechanisms of dye destruction by plasma are proposed and analysed.

English abstract

The underwater discharge generated by DC voltage in gas bubbles was studied. This contribution presents investigation of chemical efficiency of electric discharge in NaH2PO4.2H2O solution in range of the applied voltages 1.7-2.7 kV and discharge currents of 10-30 mA. Plasma is generated in Air, Ar, He and N2 gases. It is shown that maximal concentration of hydrogen peroxide produced in different gases does not depend on gas composition. Highest energy consumption of H2O2 generation is achieved in Air discharge and it decreases up to 50% in He plasma. Destruction of Direct Blue 106 with initial concentration of 20 mg/l as model organic pollutant by underwater discharge is carried out in second part of the paper. Decomposition of the dye is linearly dependent on the discharge current. Maximal efficiency of the dye destruction of 65% is observed in N2 discharge after 20 minutes of treatment at the current of 30 mA. Different mechanisms of dye destruction by plasma are proposed and analysed.

Keywords

underwater discharge in bubbles, DC discharge, H2O2 generation, organic dyes degradation

RIV year

2011

Released

21.03.2011

Pages from

865

Pages to

870

Pages count

6

BibTex


@article{BUT50747,
  author="Lucie {Němcová} and Anton {Nikiforov} and Christophe {Leys} and František {Krčma}",
  title="Chemical Efficiency of H2O2 Production and Decomposition of Organic Compounds under Action of DC Underwater Discharge in Gas Bubbles",
  annote="The underwater discharge generated by DC voltage in gas bubbles was studied. This contribution presents investigation of chemical efficiency of electric discharge in NaH2PO4.2H2O solution in range of the applied voltages 1.7-2.7 kV and discharge currents of 10-30 mA. Plasma is generated in Air, Ar, He and N2 gases. It is shown that maximal concentration of hydrogen peroxide produced in different gases does not depend on gas composition. Highest energy consumption of H2O2 generation is achieved in Air discharge and it decreases up to 50% in He plasma. Destruction of Direct Blue 106 with initial concentration of 20 mg/l as model organic pollutant by underwater discharge is carried out in second part of the paper. Decomposition of the dye is linearly dependent on the discharge current. Maximal efficiency of the dye destruction of 65% is observed in N2 discharge after 20 minutes of treatment at the current of 30 mA. Different mechanisms of dye destruction by plasma are proposed and analysed.",
  chapter="50747",
  journal="IEEE Transactions on Plasma Science",
  number="3",
  volume="39",
  year="2011",
  month="march",
  pages="865--870",
  type="journal article - other"
}