article
A Novel Dielectric Barrier Discharge (DBD) Reactor with Streamer and Glow Corona Discharge for Improved Ozone Generation at Atmospheric Pressure
1 October 2021
Indexed reference — no copy held
This work is indexed here by title and author because the archive refers to it. Its text is still in copyright and is not reproduced.
Abstract
An experiment with a parallel-plate dielectric barrier discharge in pure oxygen at atmospheric pressure: a half-millimetre gap, a sinusoidal drive, and a thin layer of silver laid between each electrode and its dielectric plate. The silver layer stops partial discharge at the electrode and concentrates the field in the gap, and with it the reactor holds a stable glow corona in one half-cycle and streamers in the other, where ordinary reactors at atmospheric pressure manage st...
Micromachines 12(11), 1287 (2021). Open access, CC BY.
DOI 10.3390/mi12111287 · PubMed Central, full text
Abstract
Discharge mode is an important parameter for ozone synthesis by dielectric barrier discharge (DBD). Currently, it is still challenging to stably generate glow discharge with oxygen at atmospheric pressure. In this paper, a DBD reactor with a layer of silver placed between the electrode and the dielectric layer (SL-DBD) was developed. Experimental results show that both streamer and glow corona discharge were stably generated under sinusoidal excitation with a 0.5 mm discharge gap in a parallel-plate DBD, due to the increased electric field strength in the discharge gap by the silver layer. It was also found that, in the SL-DBD reactor, glow corona discharge enhances the discharge strength by 50 times. The spectral peak of O at 777 nm in SL-DBD is increased to 28,800, compared with 18,389 in a reactor with a streamer only. The SL-DBD reactor produces ozone with a concentration of as high as 150 g/m3 and shows good stability in an 8 h durability test.
Why it is here
An experiment with a parallel-plate dielectric barrier discharge in pure oxygen at atmospheric pressure: a half-millimetre gap, a sinusoidal drive, and a thin layer of silver laid between each electrode and its dielectric plate. The silver layer stops partial discharge at the electrode and concentrates the field in the gap, and with it the reactor holds a stable glow corona in one half-cycle and streamers in the other, where ordinary reactors at atmospheric pressure manage streamers only. The glow raised the discharge power fifty-fold, the 777 nm atomic oxygen line rose by more than half, and ozone came out at 150 grams per cubic metre and held for eight hours.
Kept because it is the nearest published cousin of Meyer's ambient air ionizer and gas processor: a gas between plates, a dielectric in the gap, an alternating high voltage, and the aim of exciting the oxygen rather than heating it. The 777 nm line is the atomic oxygen emission Meyer's LED and laser pumping of the processor would have to work on. The paper also shows, in numbers, what a conductor placed against a dielectric does to the field in the gap, which is the question every reader of the resonant cavity drawings asks about the stainless tubes and the water. Open access, so the full text is a click away.
Provenance
- Shelf
- Reference Library
- Doi
- 10.3390/mi12111287
- Author
- Pu Liu, Yongxin Song and Zhitao Zhang
- Patent office record
- pmc.ncbi.nlm.nih.gov →
- Rights
- Published in 2021 and in copyright. Indexed here by title, authors and citation, with the archive's own note on why it is kept; the text is not reproduced.
- Citation
- Micromachines 12(11), 1287 (2021). Open access, CC BY.
- Collected By
- the archive