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

Journal of CO2 Utilization, vol. 88, pp. 102952

Abstract

Energy efficiency and conversion in a reverse-vortex microwave CO 2 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.

Authors 6

1. C.F.A.M. van Deursen corresponding
2. H.M.S. van Poyer
3. Waldo A. Bongers

   Dutch Institute for Fundamental Energy Research

   Affiliation as printed

   DIFFER, de Zaale 20, Eindhoven, the Netherlands

4. Floran J. J. Peeters
   Affiliation as printed

   LeydenJar, Emmy Noetherweg 2D, Leiden, the Netherlands

5. F.M.A. Smits Aachen

   Leiden University · University of Applied Sciences Leiden

   Affiliation as printed

   Leiden Institute of Physics, Leiden University, the Netherlands

6. M. C. M. van de Sanden