Ozone Generation by Hybrid Discharge Combined with Catalysis

Abstract

In this paper, combining hybrid discharge with pellet alumina catalyst is used for ozone generation. The hybrid discharge including corona discharge (CD), surface discharge (SD) and dielectric barrier discharge (DBD) may happen in the device. Factors that affect the ozone production efficiency and concentration are studied, such as energy density, power, gas flow rate, frequency, peak voltage and catalysts.

Ozone Synthesis Using Shielded Sliding Discharge: Effect of Oxygen Content and Positive versus Negative Streamer Mode

“…These values are higher compared to >3 g/Nm 3 and 40 to 10 g/kW·h reported in a review article detailing results of surface DBDs and 0.2–3 g/Nm 3 with an energy yield of 90 to 10 g/kW·h reported for some recent surface DBDs. − One factor making the reactor of the present study more efficient is the use of nanosecond pulsed driving voltage with a sharp rise time being more efficient than the sinusoidal driving voltage employed in earlier studies . The production yields for ozone in this study are comparable with 10–110 g/kW·h in the case of pulsed corona discharges driven by nanosecond pulsed voltages, , and with 60–160 g/kW·h in the case of a DBD reactor packed with γ-alumina catalytic packing. , …”

Effective Ozone Generation in Oxygen Using a Mesh Electrode in an Ozonizer with Variable Linear Velocity

“…Some arrangements of the discharge space are unconventional, due to which the process higher yields are obtained (Jung and Moon 2008;Takaki et al 2009). It is worth to notice that filling of the discharge gap with materials, which constitute an irregular structure, e.g., fine wires (Okazaki et al 1988;Ozonek et al 2002) or nonconductive grains, e.g., barium titanate, titanium dioxide, silica or alumina (Huang et al 2007;Jodzis 2003;Mizuno et al 1992;Moon 2006;Pekarek 2008;Schmidt-Szałowski et al 1990) also allowed to obtain higher both, concentrations and efficiencies.…”

Evaluation of Ozone Generation in Volume Spiral-Tubular Dielectric Barrier Discharge Source

“…The turbulent airflow conditions (which exist in the real tubular pneumatic system at 100 Nl/min air flow rate) have also not been taken into account in the FEM simulation. There are literature references related to catalytic effects of Al 2 O 3 in DBD ozone synthesis, however, such effects are pronounced in packed-bed-type ozonizers or if surface discharges are employed [26,27]. However, as it was verified experimentally a perceptible catalytic action of Al 2 O 3 was also perceived in the presented volume-type DBD OG, accounting for approximately 5% increase in its performance in relation to the non-catalytic scheme using a brass internal electrode.…”