Reactive Species Transport to Water Micro-Droplets in Atmospheric Pressure Rf Glow Discharges

Gaurav Nayak; Peter J. Bruggeman; MacKenzie Meyer; Mark J. Kushner

doi:10.1109/ICOPS36761.2021.9588442

Reactive Species Transport to Water Micro-Droplets in Atmospheric Pressure Rf Glow Discharges

Gaurav Nayak, Peter J. Bruggeman, MacKenzie Meyer, Mark J. Kushner

Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Chemical reactivity transfer from gas-phase plasmas to liquid can be significantly enhanced when a plasma interacts with small liquid micro-droplets as opposed to bulk liquid. In this contribution, the role of • OH as well as non- • OH driven chemistry on the degradation of an organic compound (formate) by activation of water micro-droplets by atmospheric pressure diffuse RF glow plasmas in He and different gas admixtures (Ar, H 2 , O 2 , H 2 O) is explored. Using detailed gas-phase plasma diagnostics, droplet characterization and ex situ chemical analysis of the plasma- treated droplets, the effect of short-lived species such as O • , H • and • OH, O 2 ( a ), electrons/ions, and metastable atoms of He and Ar is quantified. With increasing droplet residence time, the formate decomposition increases in electronegative plasmas (He/H 2 O He/Ar/H 2 O, He/O 2 ), with a maximum of ~70% within ~15 ms, while an inverse trend is observed in electropositive plasmas (He, He/H 2 , He/Ar), with >75% degradation within ~5 ms.

Original language	English (US)
Title of host publication	2021 IEEE International Conference on Plasma Science, ICOPS 2021
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781665432276
DOIs	https://doi.org/10.1109/ICOPS36761.2021.9588442
State	Published - Sep 12 2021
Event	2021 IEEE International Conference on Plasma Science, ICOPS 2021 - Lake Tahoe, United States Duration: Sep 12 2021 → Sep 16 2021

Publication series

Name	IEEE International Conference on Plasma Science
Volume	2021-September
ISSN (Print)	0730-9244

Conference

Conference	2021 IEEE International Conference on Plasma Science, ICOPS 2021
Country/Territory	United States
City	Lake Tahoe
Period	9/12/21 → 9/16/21

Bibliographical note

Funding Information:
________________________________ * This work was supported by the Army Research Office under Grant No. W911NF-20-1-0105 and NSF grant under Award Number PHY 1903151.

Publisher Copyright:
© 2021 IEEE.

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10.1109/ICOPS36761.2021.9588442

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Nayak, G., Bruggeman, P. J., Meyer, M., & Kushner, M. J. (2021). Reactive Species Transport to Water Micro-Droplets in Atmospheric Pressure Rf Glow Discharges. In 2021 IEEE International Conference on Plasma Science, ICOPS 2021 (IEEE International Conference on Plasma Science; Vol. 2021-September). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICOPS36761.2021.9588442

Reactive Species Transport to Water Micro-Droplets in Atmospheric Pressure Rf Glow Discharges. / Nayak, Gaurav; Bruggeman, Peter J.; Meyer, MacKenzie et al.
2021 IEEE International Conference on Plasma Science, ICOPS 2021. Institute of Electrical and Electronics Engineers Inc., 2021. (IEEE International Conference on Plasma Science; Vol. 2021-September).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Nayak, G, Bruggeman, PJ, Meyer, M & Kushner, MJ 2021, Reactive Species Transport to Water Micro-Droplets in Atmospheric Pressure Rf Glow Discharges. in 2021 IEEE International Conference on Plasma Science, ICOPS 2021. IEEE International Conference on Plasma Science, vol. 2021-September, Institute of Electrical and Electronics Engineers Inc., 2021 IEEE International Conference on Plasma Science, ICOPS 2021, Lake Tahoe, United States, 9/12/21. https://doi.org/10.1109/ICOPS36761.2021.9588442

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abstract = "Chemical reactivity transfer from gas-phase plasmas to liquid can be significantly enhanced when a plasma interacts with small liquid micro-droplets as opposed to bulk liquid. In this contribution, the role of • OH as well as non- • OH driven chemistry on the degradation of an organic compound (formate) by activation of water micro-droplets by atmospheric pressure diffuse RF glow plasmas in He and different gas admixtures (Ar, H 2 , O 2 , H 2 O) is explored. Using detailed gas-phase plasma diagnostics, droplet characterization and ex situ chemical analysis of the plasma- treated droplets, the effect of short-lived species such as O • , H • and • OH, O 2 ( a ), electrons/ions, and metastable atoms of He and Ar is quantified. With increasing droplet residence time, the formate decomposition increases in electronegative plasmas (He/H 2 O He/Ar/H 2 O, He/O 2 ), with a maximum of ~70% within ~15 ms, while an inverse trend is observed in electropositive plasmas (He, He/H 2 , He/Ar), with >75% degradation within ~5 ms.",

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N2 - Chemical reactivity transfer from gas-phase plasmas to liquid can be significantly enhanced when a plasma interacts with small liquid micro-droplets as opposed to bulk liquid. In this contribution, the role of • OH as well as non- • OH driven chemistry on the degradation of an organic compound (formate) by activation of water micro-droplets by atmospheric pressure diffuse RF glow plasmas in He and different gas admixtures (Ar, H 2 , O 2 , H 2 O) is explored. Using detailed gas-phase plasma diagnostics, droplet characterization and ex situ chemical analysis of the plasma- treated droplets, the effect of short-lived species such as O • , H • and • OH, O 2 ( a ), electrons/ions, and metastable atoms of He and Ar is quantified. With increasing droplet residence time, the formate decomposition increases in electronegative plasmas (He/H 2 O He/Ar/H 2 O, He/O 2 ), with a maximum of ~70% within ~15 ms, while an inverse trend is observed in electropositive plasmas (He, He/H 2 , He/Ar), with >75% degradation within ~5 ms.

AB - Chemical reactivity transfer from gas-phase plasmas to liquid can be significantly enhanced when a plasma interacts with small liquid micro-droplets as opposed to bulk liquid. In this contribution, the role of • OH as well as non- • OH driven chemistry on the degradation of an organic compound (formate) by activation of water micro-droplets by atmospheric pressure diffuse RF glow plasmas in He and different gas admixtures (Ar, H 2 , O 2 , H 2 O) is explored. Using detailed gas-phase plasma diagnostics, droplet characterization and ex situ chemical analysis of the plasma- treated droplets, the effect of short-lived species such as O • , H • and • OH, O 2 ( a ), electrons/ions, and metastable atoms of He and Ar is quantified. With increasing droplet residence time, the formate decomposition increases in electronegative plasmas (He/H 2 O He/Ar/H 2 O, He/O 2 ), with a maximum of ~70% within ~15 ms, while an inverse trend is observed in electropositive plasmas (He, He/H 2 , He/Ar), with >75% degradation within ~5 ms.

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Reactive Species Transport to Water Micro-Droplets in Atmospheric Pressure Rf Glow Discharges

Abstract

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