Post-plasma Quenching to Improve Conversion and Energy Efficiency in a CO2 Microwave Plasma

TitlePost-plasma Quenching to Improve Conversion and Energy Efficiency in a CO2 Microwave Plasma
Publication TypeJournal Article
Year of Publication2023
AuthorsE.R. Mercer, S. van Alphen, C.F.AM van Deursen, T.W.H Righart, W.A. Bongers, R. Snyders, A. Bogaerts, M.C.M van de Sanden, F.J.J Peeters
JournalFuel
Volume334
IssuePart 2
Pagination126734
Date Published02/2023
Abstract

Transforming CO2 into value-added chemicals is crucial to realizing a carbon–neutral economy, and plasma-based conversion, a Power-2-X technology, offers a promising route to realizing an efficient and scalable process. This paper investigates the effects of post-plasma placement of a converging–diverging nozzle in a vortex-stabilized 2.45 GHz CO2 microwave plasma reactor to increase energy efficiency and conversion. The CDN leads to a 21% relative increase in energy efficiency (31%) and CO2 conversion (13%) at high flow rates and near-atmospheric conditions. The most significant performance improvement was seen at low flow rates and sub-atmospheric pressure (300 mbar), where energy efficiency was 23% and conversion was 28%, a 71% relative increase over conditions without the CDN. Using CFD simulations, we found that the CDN produces a change in the flow geometry, leading to a confined temperature profile at the height of the plasma, and forced extraction of CO to the post-CDN region.

DOI10.1016/j.fuel.2022.126734
Division

MaSF

Department

PSFD

PID

d5aa7c4da05644233b874190f6002ecc

Alternate TitleFuel
LabelOA

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