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Multi-hollow surface dielectric barrier discharge: an ozone generator with flexible performance and supreme efficiency
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SYSNO ASEP 0535367 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Multi-hollow surface dielectric barrier discharge: an ozone generator with flexible performance and supreme efficiency Tvůrce(i) Homola, Tomáš (UFP-V) ORCID
Prukner, Václav (UFP-V) RID, ORCID
Hoffer, Petr (UFP-V) RID
Šimek, Milan (UFP-V) RID, ORCIDCelkový počet autorů 4 Číslo článku 095014 Zdroj.dok. Plasma Sources Science & Technology. - : Institute of Physics Publishing - ISSN 0963-0252
Roč. 29, č. 9 (2020)Poč.str. 15 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova 1st positive system ; temperature-dependence ; numerical-simulation ; energy-conversion ; plasma treatment ; oxygen ; n-2 ; emission ; nematode ; dielectric barrier discharge ; ozone ; production yield ; multi-hollow surface DBD ; msdbd Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) CEP GA15-04023S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UFP-V - RVO:61389021 UT WOS 000575395600001 EID SCOPUS 85092302932 DOI 10.1088/1361-6595/aba987 Anotace This contribution investigates the effects of duty cycle and mass flow of synthetic air and oxygen on the efficiency of ozone generation in multi-hollow surface dielectric barrier discharge (MSDBD). It discloses that the efficiency of ozone generation in MSDBD is significantly higher compared with standard coplanar DBD, surface DBD and volume DBDs. Ozone production yield reached 205.5 +/- 29.1 g (kW h)(-1)(40% duty cycle, 8 slm) and 413.91 +/- 58.7 g (kW h)(-1)(100% duty cycle, 8 slm) at an energy cost of 8.7 and 4.3 eV/molecule for synthetic air and oxygen, respectively. Such high ozone yields arose out of the intrinsic characteristics of MSDBD ceramics, which were efficiently cooled by the flow of the working gas. The amplitude modulation of low-frequency 5 kHz high-voltage sine waveforms facilitates controlled O(3)production at a nearly constant rate of yield. Since the correct evaluation of ozone production yield requires precise determination of the discharge power, the concentration of ozone and working gas-flow, considerable attention was paid to measurements of these parameters. It is confirmed and experimentally demonstrated herein that correct determination of discharge power lies with Lissajous figure methods, while the determination of power through the direct integration of productu(t)i(t), wherei(t) is measured by Pearson current probe, leads to systematically lower values of calculated power with consequent overestimation of the ozone production yield. The correct determination of discharge power is clearly the key to the proper calculation of ozone production yield and efficiency. Under the DBD discharge conditions presented herein, ozone production yield and efficiency achieved figures as high as 19.5% and 35.2% of theoretical limits recently established for air and oxygen, respectively. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2021 Elektronická adresa https://iopscience.iop.org/article/10.1088/1361-6595/aba987
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