Effluent nozzles in reverse-vortex-stabilized microwave CO2 plasmas for improved energy efficiency

C.F.A.M. van Deursen; H.M.S. van Poyer; W.A. Bongers; F.J.J. Peeters; F.M.A. Smits; M.C.M. van de Sanden

doi:10.1016/j.jcou.2024.102952

Effluent nozzles in reverse-vortex-stabilized microwave CO₂ plasmas for improved energy efficiency

C.F.A.M. van Deursen (Corresponding author), H.M.S. van Poyer, W.A. Bongers, F.J.J. Peeters, F.M.A. Smits, M.C.M. van de Sanden

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Energy efficiency and conversion in a reverse-vortex microwave CO₂ plasma are enhanced by optimizing the thermal trajectories using a converging diverging nozzle in subsonic flows. The nozzle mixes cold, unconverted gas at the edge of the flow with hot, active gas in the middle of the flow. Temperature measurements are taken of the quartz tube as well as just above the nozzle inlet and directly after the nozzle and presented to elucidate differences in performance. Measurements show significant improvements in conversion and energy efficiency, especially at pressures close to atmospheric pressure (500 – 900 mbar). In addition an improvement in plasma stability when adding a converging diverging nozzle. Thermal measurements also point towards a shift in energy loss mechanisms when changing flow configurations.

Originele taal-2	Engels
Artikelnummer	102952
Aantal pagina's	10
Tijdschrift	Journal of CO2 Utilization
Volume	88
DOI's	https://doi.org/10.1016/j.jcou.2024.102952
Status	Gepubliceerd - okt. 2024

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© 2024 The Authors

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10.1016/j.jcou.2024.102952

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title = "Effluent nozzles in reverse-vortex-stabilized microwave CO2 plasmas for improved energy efficiency",

abstract = "Energy efficiency and conversion in a reverse-vortex microwave CO2 plasma are enhanced by optimizing the thermal trajectories using a converging diverging nozzle in subsonic flows. The nozzle mixes cold, unconverted gas at the edge of the flow with hot, active gas in the middle of the flow. Temperature measurements are taken of the quartz tube as well as just above the nozzle inlet and directly after the nozzle and presented to elucidate differences in performance. Measurements show significant improvements in conversion and energy efficiency, especially at pressures close to atmospheric pressure (500 – 900 mbar). In addition an improvement in plasma stability when adding a converging diverging nozzle. Thermal measurements also point towards a shift in energy loss mechanisms when changing flow configurations.",

keywords = "Carbon dioxide, Plasma dissociation, Reverse vortex, Thermal plasma",

author = "{van Deursen}, C.F.A.M. and {van Poyer}, H.M.S. and W.A. Bongers and F.J.J. Peeters and F.M.A. Smits and {van de Sanden}, M.C.M.",

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AU - van Deursen, C.F.A.M.

AU - van Poyer, H.M.S.

AU - Bongers, W.A.

AU - Peeters, F.J.J.

AU - Smits, F.M.A.

AU - van de Sanden, M.C.M.

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N2 - Energy efficiency and conversion in a reverse-vortex microwave CO2 plasma are enhanced by optimizing the thermal trajectories using a converging diverging nozzle in subsonic flows. The nozzle mixes cold, unconverted gas at the edge of the flow with hot, active gas in the middle of the flow. Temperature measurements are taken of the quartz tube as well as just above the nozzle inlet and directly after the nozzle and presented to elucidate differences in performance. Measurements show significant improvements in conversion and energy efficiency, especially at pressures close to atmospheric pressure (500 – 900 mbar). In addition an improvement in plasma stability when adding a converging diverging nozzle. Thermal measurements also point towards a shift in energy loss mechanisms when changing flow configurations.

AB - Energy efficiency and conversion in a reverse-vortex microwave CO2 plasma are enhanced by optimizing the thermal trajectories using a converging diverging nozzle in subsonic flows. The nozzle mixes cold, unconverted gas at the edge of the flow with hot, active gas in the middle of the flow. Temperature measurements are taken of the quartz tube as well as just above the nozzle inlet and directly after the nozzle and presented to elucidate differences in performance. Measurements show significant improvements in conversion and energy efficiency, especially at pressures close to atmospheric pressure (500 – 900 mbar). In addition an improvement in plasma stability when adding a converging diverging nozzle. Thermal measurements also point towards a shift in energy loss mechanisms when changing flow configurations.

KW - Carbon dioxide

KW - Plasma dissociation

KW - Reverse vortex

KW - Thermal plasma

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