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@article{1852561,
author = {Arsénio Nunes Aleixo Viegas, Pedro and Vialetto, L. and van de Steeg, A. W. and Wolf, A. J. and Bongers, W. A. and van Rooij, G. J. and van de Sanden, M. C. M. and Diomede, P. and Peeters, F. J. J.},
article_number = {6},
doi = {http://dx.doi.org/10.1088/1361-6595/ac04bd},
keywords = {atomic oxygen kineticsdis; charge spatial resolution; optical contraction; discharge contraction; CO2 conversion},
language = {eng},
issn = {0963-0252},
journal = {Plasma Sources Science and Technology},
title = {Resolving discharge parameters from atomic oxygen emission},
url = {https://iopscience.iop.org/article/10.1088/1361-6595/ac04bd},
volume = {30},
year = {2021}
}
TY - JOUR
ID - 1852561
AU - Arsénio Nunes Aleixo Viegas, Pedro - Vialetto, L. - van de Steeg, A. W. - Wolf, A. J. - Bongers, W. A. - van Rooij, G. J. - van de Sanden, M. C. M. - Diomede, P. - Peeters, F. J. J.
PY - 2021
TI - Resolving discharge parameters from atomic oxygen emission
JF - Plasma Sources Science and Technology
VL - 30
IS - 6
SP - 1-21
EP - 1-21
PB - IOP Publishing Ltd
SN - 09630252
KW - atomic oxygen kineticsdis
KW - charge spatial resolution
KW - optical contraction
KW - discharge contraction
KW - CO2 conversion
UR - https://iopscience.iop.org/article/10.1088/1361-6595/ac04bd
N2 - A method is proposed to spatially resolve discharge parameters from experimental measurements of emission intensity and 1D numerical simulations including an O atom collisional-radiative model. The method can be used for different plasmas and conditions. Here, contracted microwave discharges for CO2 conversion are studied at intermediate to high pressures (100–300 mbar). Radial profiles of electron density (ne) are used as input in the model and corrected to successfully simulate the measured Gaussian profiles of emission intensity of the 777 nm transition (I777). As a result, radially-resolved parameters inaccessible in experiments, such as ne, power density (Pabs), electron temperature (Te), electric field and reaction rates, are numerically-obtained for several conditions. ne and Pabs approximately follow Gaussian profiles that are broader than that of I777. For pressures below 150 mbar, the difference in full width at half maximum is typically a factor 1.6. This consists in a phenomenon of optical contraction, which is due to concave profiles of O molar fraction and Te. The implications of the simulated profiles on the study of plasmas for CO2 conversion are discussed and it is shown that these profiles allow to explain high reactor performances at low pressures.
ER -
ARSÉNIO NUNES ALEIXO VIEGAS, Pedro, L. VIALETTO, A. W. VAN DE STEEG, A. J. WOLF, W. A. BONGERS, G. J. VAN ROOIJ, M. C. M. VAN DE SANDEN, P. DIOMEDE a F. J. J. PEETERS. Resolving discharge parameters from atomic oxygen emission. \textit{Plasma Sources Science and Technology}. IOP Publishing Ltd, 2021, roč.~30, č.~6, s.~1-21. ISSN~0963-0252. Dostupné z: https://dx.doi.org/10.1088/1361-6595/ac04bd.
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