Nitric Oxide Conversion and Ozone Synthesis in a Shielded Sliding Discharge Reactor with Positive and Negative Streamers

Malik, Muhammad; Schoenbach, Karl
January 2014
Plasma Chemistry & Plasma Processing;Jan2014, Vol. 34 Issue 1, p93
Academic Journal
Positive and negative streamer discharges in atmospheric pressure air were generated in a shielded sliding discharge reactor at operating voltages as low as 5 kV for a gap length of 1.6 cm. In this reactor, electrodes are placed on top of a dielectric layer and one of the electrodes, generally the one on ground potential, is connected to a conductive layer on the opposite side of the dielectric. The energy per pulse, at the same applied voltage, was more than a factor of seven higher than that of pulsed corona discharges, and more than a factor of two higher than that of sliding discharges without a shield. It is explained on the basis of enhanced electric fields, particularly at the plasma emitting electrode. Specific input energy required for 50 % removal from ~1,000 ppm initial NO could be reduced to ~18 eV/molecule when ozone in the exhaust of negative streamers was utilized. For sliding discharges and pulsed corona discharges this value was ~25 eV/molecule and it was 35 eV/molecule for positive shielded sliding discharges. Also, the ozone energy yield from dry air was up to ~130 g/kW h and highest for negative streamer discharges in shielded sliding discharge reactors. The high energy density in negative streamer discharges in the shielded discharge reactor at the relatively low applied voltages might not only allow expansion of basic studies on negative streamers, but also open the path to industrial applications, which have so far been focused on positive streamer discharges.


Related Articles

  • An experimental study on discharge mechanism of pulsed atmospheric pressure glow discharges. Huang, Xiaojiang; Sun, Liqun; Bao, Yun; Zhang, Jing; Shi, J. J. // Physics of Plasmas;Mar2011, Vol. 18 Issue 3, p033503 

    The discharge mechanism of pulsed atmospheric pressure glow discharges excited by the unipolar positive voltage pulses between two parallel plate electrodes with or without one dielectric barrier on the ground electrode in flowing helium has been characterized by nanosecond time resolved optical...

  • Structure of the glow of a nanosecond diffuse discharge in a strongly nonuniform electric field. Rep’ev, A.; Repin, P.; Danchenko, E. // Technical Physics;Jul2008, Vol. 53 Issue 7, p858 

    The structure of the glow of a diffuse discharge in air under atmospheric pressure is studied in detail in the “rod (cathode)-plane” geometry for an electrode gap of 10 cm and a cathode tip radius from 3 cm to 2.4 μm. The amplitude of voltage across the gap was ∼ 220 kV for...

  • Alternating nonsteady gas-discharge modes in an atmospheric-pressure air flow blown through a point-plane gap. Akishev, Yu. S.; Aponin, G. I.; Grushin, M. E.; Karal'nik, V. B.; Pan'kin, M. V.; Petryakov, A. V.; Trushkin, N. I. // Plasma Physics Reports;Apr2008, Vol. 34 Issue 4, p312 

    The electric and spectral characteristics of a nonsteady discharge in an atmospheric air flow blown through a point-plane interelectrode gap were investigated experimentally. The discharge was produced by applying a constant positive voltage to the point electrode, the amplitude of the applied...

  • X-ray emission from a low-current volume discharge in air at atmospheric pressure. Kostyrya, I. D.; Tarasenko, V. F. // Technical Physics Letters;May2007, Vol. 33 Issue 5, p424 

    The discharges in air gaps with cathodes of small curvature radius under the action of nanosecond high-voltage pulses have been studied. Low-current volume (diffused) discharge in air at atmospheric pressure is a source of x-ray emission. In the case of discharge with a low-intensity visible...

  • Large-volume and low-frequency atmospheric glow discharges without dielectric barrier. Shi, J. J.; Kong, M. G. // Applied Physics Letters;2/28/2005, Vol. 86 Issue 9, p091502 

    It is widely believed that, at low frequencies of 1–100 kHz, the generation of atmospheric pressure glow discharges (APGD) requires a dielectric barrier added to at least one electrode. This letter reports the experimental observation of a uniform and stable APGD generated between two...

  • Discharge characteristics of atmospheric-pressure radio-frequency glow discharges with argon/nitrogen. Hua-Bo Wang; Wen-Ting Sun; He-Ping Li; Cheng-Yu Bao; Xing Gao; Hui-Ying Luo // Applied Physics Letters;10/16/2006, Vol. 89 Issue 16, p161504 

    In this letter, atmospheric-pressure glow discharges in γ mode with argon/nitrogen as the plasma-forming gas using water-cooled, bare copper electrodes driven by radio-frequency power supply at 13.56 MHz are achieved. The preliminary studies on the discharge characteristics show that, induced...

  • Dynamics of the optical emission from a high-voltage diffuse discharge in a rod-plane electrode system in atmospheric-pressure air. Rep’ev, A.; Repin, P. // Plasma Physics Reports;Jan2006, Vol. 32 Issue 1, p72 

    Results are presented from experimental investigations of the dynamics of optical emission from a nanosecond diffuse discharge in a rod-plane electrode system. A study was made of discharges in a 10-cm-long interelectrode gap in atmospheric-pressure air (the cathode being a 1-cm-diameter rod...

  • Columnar discharge mode between parallel dielectric barrier electrodes in atmospheric pressure helium. Yanpeng Hao; Bin Zheng; Yaoge Liu // Physics of Plasmas;Jan2014, Vol. 21 Issue 1, p1 

    Using a fast-gated intensified charge-coupled device, end- and side-view photographs were taken of columnar discharge between parallel dielectric barrier electrodes in atmospheric pressure helium. Based on three-dimensional images generated from end-view photographs, the number of discharge...

  • Influence of impurities on the uniform atmospheric-pressure discharge in helium. Wang, Yanhui; Wang, Dezhen // Physics of Plasmas;Feb2005, Vol. 12 Issue 2, p023503 

    The influence of small nitrogen impurities on the uniform barrier discharge at atmospheric pressure in helium is investigated by numerical simulation with a one-dimensional fluid model. The simulation results show that in different discharge modes the influence of impurities is completely...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics