Ozone production in parallel multichannel dielectric barrier discharge from oxygen and air: the influence of gas pressure

Yuan, Dingkun; Wang, Zhihua; Ding, Cong; He, Yong; Whiddon, Ronald; Cen, Kefa

doi:10.1088/0022-3727/49/45/455203

Cited by 51 publications

(25 citation statements)

References 68 publications

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“…This is an expected effect due to the highly oxidative character of the excited species in air plasmas 32 (i.e., atomic oxygen (O * ) as reported by Kuzminova et al . 33 for this kind of plasmas, and very likely other charged species, such as O 2 + ) and the ozone simultaneously formed during DBD plasma treatments 34 . Similar surface oxidation effects have been described for different seed grains exposed to RF air plasmas 26 and for polymers 30 graphites 35 and other carbon reach materials 36 where affectation thicknesses up to 100 nm have been induced by similar plasma treatments 30 .…”

Section: Resultsmentioning

confidence: 95%

Surface chemistry and germination improvement of Quinoa seeds subjected to plasma activation

Gómez‐Ramírez

López‐Santos

Cantos

et al. 2017

Sci Rep

101

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Plasma treatment is recognized as a suitable technology to improve germination efficiency of numerous seeds. In this work Quinoa seeds have been subjected to air plasma treatments both at atmospheric and low pressure and improvements found in germination rate and percentage of success. Seed water uptake by exposure to water vapor, although slightly greater for plasma treated seeds, did not justify the observed germination improvement. To identify other possible factors contributing to germination, the chemical changes experienced by outer parts of the seed upon plasma exposure have been investigated by X-ray photoemission spectroscopy (XPS) and scanning electron microscopy (SEM-EDX). XPS revealed that the outer layers of the Quinoa plasma treated seeds were highly oxidized and appeared enriched in potassium ions and adsorbed nitrate species. Simultaneously, SEM-EDX showed that the enrichment in potassium and other mineral elements extended to the seed pericarp and closer zones. The disappearance from the surface of both potassium ions and nitrate species upon exposure of the plasma treated seeds to water vapor is proposed as a factor favoring germination. The use of XPS to study chemical changes at seed surfaces induced by plasma treatments is deemed very important to unravel the mechanisms contributing to germination improvement.

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Section: Resultsmentioning

confidence: 95%

Surface chemistry and germination improvement of Quinoa seeds subjected to plasma activation

Gómez‐Ramírez

López‐Santos

Cantos

et al. 2017

Sci Rep

101

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“…2 For practical applications, nonthermal plasma is the most studied method. The abilities of dielectric barrier discharge (DBD), [3][4][5][6] packed-bed discharge, 7 and DC corona discharge 8 to generate nonthermal plasmas have been studied for several years. Commercial ozonizers are most commonly manufactured based on the DBD method.…”

Section: Introductionmentioning

confidence: 99%

“…This nitrogen oxide reacts with moisture in the seeding gas to create nitric acid. 3 If nitric acid accumulates in the DBD narrow discharge area, ozone cannot be generated, and the electrodes will corrode, making it necessary to clean the electrodes regularly or replace them frequently. On the other hand, pulse discharge with a high voltage rise rate enables a wide electrode gap, yielding a large discharge volume, which in turn means ozone can be generated regardless of the byproducts.…”

Section: Introductionmentioning

confidence: 99%

Yield Improvement of Air-Fed Ozonizer Using Shorter Pulsed Discharges

2020

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Ozone is well-known for its strong oxidation properties, which are used in many industrial applications. Recently, it is also gaining attention in the fields of biology, agriculture, and medicine. Though most commercial ozonizers work via the dielectric barrier discharge method, there are still some issues that need to be improved, including type of seeding gas, byproducts, and ozone yield. In this research, ozone was generated in air using pulsed discharges with different pulse durations (50, 100, and 200 ns). The results show that shorter pulsed discharges generate ozone at a higher energy efficiency. This is due to the shorter length of the glow discharge phase in the pulse.

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“…25,26 However, the relatively high investment and running cost are becoming the biggest obstacles in promoting this technique. 27 Therefore, catalysts are introduced to improve the oxidation efficiency with low ozone usage. 28 The catalytic ozonation is usually carried out at low temperature due to the thermal accelerated ozone decomposition process.…”

Section: Introductionmentioning

confidence: 99%

Catalyst tolerance to SO₂and water vapor of Mn based bimetallic oxides for NO deep oxidation by ozone

et al. 2017

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Ozone production in parallel multichannel dielectric barrier discharge from oxygen and air: the influence of gas pressure

Cited by 51 publications

References 68 publications

Surface chemistry and germination improvement of Quinoa seeds subjected to plasma activation

Surface chemistry and germination improvement of Quinoa seeds subjected to plasma activation

Yield Improvement of Air-Fed Ozonizer Using Shorter Pulsed Discharges

Catalyst tolerance to SO₂and water vapor of Mn based bimetallic oxides for NO deep oxidation by ozone

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Ozone production in parallel multichannel dielectric barrier discharge from oxygen and air: the influence of gas pressure

Cited by 51 publications

References 68 publications

Surface chemistry and germination improvement of Quinoa seeds subjected to plasma activation

Surface chemistry and germination improvement of Quinoa seeds subjected to plasma activation

Yield Improvement of Air-Fed Ozonizer Using Shorter Pulsed Discharges

Catalyst tolerance to SO2and water vapor of Mn based bimetallic oxides for NO deep oxidation by ozone

Contact Info

Product

Resources

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Catalyst tolerance to SO₂and water vapor of Mn based bimetallic oxides for NO deep oxidation by ozone