Abstract

Low pressure surfaguide microwave discharge working in pulsed regime and used for CO2 conversion is characterized by optical spectroscopy methods aiming at better understanding of the conversion process. The rotational, vibrational, and electron excitation in plasma were studied. The translational (Tgas) and vibrational (Tvibr) temperatures are found elevated in the discharge active zone. At low pressure (<1 Torr) discharge demonstrates non-equilibrium with Tgas∼ 700 K (0.06 eV) and electron temperature (Te) of nearly 2 eV. Non-equilibrium state gradually disappears as the gas pressure increases, resulting in a growth of Tgas and decrease of Te. Tvibr of nitrogen also slowly decreases towards the equilibrium condition. The CO2 conversion and energy efficiencies have been examined as a function of the discharge pulse parameters, such as the plasma pulse duration, repetition rate and duty ratio, clarifying additional possibilities for optimization of conversion in the pulsed microwave discharges.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.