Catalytic activity of silica in ozone formation in electrical discharges

Schmidt‐Szałowski, K.; Borucka, Anna; Jodzis, S.

doi:10.1007/bf01447202

Cited by 16 publications

(6 citation statements)

References 4 publications

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“…Compared with the results presented in Figure 2a, it can be seen that the ozone concentrations obtained by the packed-bed reactors are substantially higher than that achieved with DBD. The result agrees with the previous works (Jodzis, 2003;Moon and Geum, 1998;Schmidt-Szalowski and Borucka, 1989;Schmidt-Szalowski et al, 1990). One of the advantages for the packed-bed type reactors is that numerous contact points exist between the dielectric pellets.…”

Section: Methodssupporting

confidence: 94%

Enhancement of Energy Yield for Ozone Production via Packed-Bed Reactors

Chen

Lee

Chang

2006

Ozone: Science & Engineering

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The present work aims to enhance the energy yield of ozone production via packed-bed reactors. It has been experimentally demonstrated that ozone concentration and corresponding energy yield achieved by packed-bed reactors are significantly higher than that achieved by DBD only. The so-called packed-bed reactor is constructed by packing granular dielectric pellets within a DBD reactor. Two kinds of dielectric materials including glass beads and Al 2 O 3 pellets are tested. Experimental results indicate that an ozone generator packed with Al 2 O 3 pellets results in a higher ozone production compared with one packed with glass beads. The maximum ozone production takes place when Al 2 O 3 pellets with diameter of 2 mm are packed. The maximum ozone concentration, ozone production rate, and energy yield achieved in this study are 61 gO 3 /m 3 , 3.7 gO 3 /hr, and 173 gO 3 /kWh, respectively. The highest ozone concentration and energy yield achieved with the packedbed reactor are about 8 and 12 times high as those with DBD reactor, respectively. Although the packed-bed reactors have a shortcoming of high temperature, it can be solved by adding a cooling system and the ozone generation can be improved thereof. As a result, the packed-bed reactor is a promising and state-of-the-art technology for ozone generation based on this study.

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Section: Methodssupporting

confidence: 94%

Enhancement of Energy Yield for Ozone Production via Packed-Bed Reactors

Chen

Lee

Chang

2006

Ozone: Science & Engineering

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“…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.…”

Section: Introductionmentioning

confidence: 97%

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

Jodzis

2012

Ozone: Science & Engineering

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Results of studies on ozone synthesis under discharges proceeding in a metal mesh-ceramic dielectric system have been presented. The experiments were carried out in the reactor with unique reaction space geometry, in which the reacting gas flew with consequently increasing linear velocity. The high voltage electrode was made of a metal mesh, which caused intensification of the gas mixing in the reaction space. Using a simple reactor with one-side cooling of the reaction space, high ozone maximum concentrations (100 g/Nm 3 ) and energy efficiencies were obtained at 25 • C.

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“…Of the different types of DBD systems, Packed Bed Plasma Reactors (PBPRs) have shown promise for generating high concentrations of ozone [9,10]. In PBPRs, dielectric pellets or beads are placed between two electrodes, one of which is connected to a high voltage power supply (cathode) while the other is grounded (anode).…”

Section: ( ) ( ) /mentioning

confidence: 99%

The characterization of a packed bed plasma reactor for ozone generation

Alabduly

Christensen

Harvey

2020

Plasma Sources Sci. Technol.

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A packed bed plasma reactor (PBPR) was designed, characterized and optimized for ozone generation from oxygen and air. The effects of reactor arrangement, feed gas flow rate, coolant temperature, input power and dielectric material on ozone generation were investigated. The highest ozone concentration of 152 g m −3 was obtained using 2.0 mm borosilicate glass beads and a 0.06 dm 3 min −1 oxygen feed at 5 °C, whilst the highest ozone yield efficiency was 209 g kW −1 h −1 at an oxygen feed rate of 20 dm 3 min −1 . The highest ozone concentration produced from air was 15.6 g m −3 at a flow rate of 0.06 dm 3 min −1 with 2.0 mm 3 A molecular sieves beads (MS) beads as the dielectric. It was found that the effect of the dielectric on ozone generation affected significantly by the feed gas composition and flow rate. In addition, ozone production affected significantly by the number of dielectric layers in contact with the HV electrodes, thickness of packing and reactor arrangement. Different NO x by-products were formed along with ozone when the PBPR was fed with air depending on the coolant temperature and feed gas flow rate.

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Catalytic activity of silica in ozone formation in electrical discharges

Cited by 16 publications

References 4 publications

Enhancement of Energy Yield for Ozone Production via Packed-Bed Reactors

Enhancement of Energy Yield for Ozone Production via Packed-Bed Reactors

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

The characterization of a packed bed plasma reactor for ozone generation

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