Scaling Down the Great Egypt Pyramids to Enhance CO₂ Splitting in a Micro DBD Reactor.

Khunda, Deema; Li, Sirui; Cherkasov, Nikolay; Chaffee, Alan; Rebrov, Evgeny V.

The CO2 splitting reaction has been investigated in a plate-to-plate micro DBD reactor with a high voltage electrode having pyramid charge injection points. The presence of sharp points (pyramids) creates zones with enhanced electric field around them. The minimum discharge voltage in the pyramid micro DBD reactor reduced from 6.5 to 5.2 kV (peak-to-peak). At the same time, the CO2 conversion increased 1.5 times as compared to that in the reactor with a flat electrode. Lowering the discharge gap from 0.50 to 0.25 mm resulted in more intense microdischarges, further increasing CO2 conversion by 1.3 times. At the same time, the energy efficiency increased further by 1.3 times. There exists an optimum residence time of 0.5 ms as a result of an interplay between plasma contact time and flow non-uniformity. The highest energy efficiency of 20% was obtained at a 3 W power, achieving a CO2 conversion of 16%.

GREAT Pyramid (Egypt); CHARGE injection; FUSION reactors; PHOTOVOLTAIC power systems; HIGH voltages; ELECTRIC fields; ENERGY consumption

Plasma Chemistry & Plasma Processing, 2023, Vol 43, Issue 6, p2017

0272-4324

Academic Journal

10.1007/s11090-023-10362-7