Publication
Title
Avoiding solid carbon deposition in plasma-based dry reforming of methane
Author
Abstract
Solid carbon deposition is a persistent challenge in dry reforming of methane (DRM), affecting both classical and plasma-based processes. In this work, we use a microwave plasma in reverse vortex flow configuration to overcome this issue in CO2/CH4 plasmas. Indeed, this configuration efficiently mitigates carbon deposition, enabling operation even with pure CH4 feed gas, in contrast to other configurations. At the same time, high reactor performance is achieved, with CO2 and CH4 conversions reaching 33% and 44% respectively, at an energy cost of 14 kJ L-1 for a CO2 : CH4 ratio of 1 : 1. Laser scattering and optical emission imaging demonstrate that the shorter residence time in reverse vortex flow lowers the gas temperature in the discharge, facilitating a shift from full to partial CH4 pyrolysis. This underscores the pivotal role of flow configuration in directing process selectivity, a crucial factor in complex chemistries like CO2/CH4 mixtures and very important for industrial applications. Our work demonstrates that solid carbon-free conversion of green-house gases into value-added compounds is possible by changing the gas flow configuration in a microwave plasma, making significant strides in green chemistry.
Language
English
Source (journal)
Green chemistry : cutting-edge research for a greener sustainable future / Royal Society of Chemistry [London] - London, 1999, currens
Publication
London : Royal Society of Chemistry , 2023
ISSN
1463-9262 [print]
1463-9270 [online]
DOI
10.1039/D3GC03595F
Volume/pages
25 :24 (2023) , p. 10485-10497
ISI
001110100100001
Full text (Publisher's DOI)
Full text (open access)
The author-created version that incorporates referee comments and is the accepted for publication version Available from 24.05.2024
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Project info
Plasma catalysis for CO2 recycling and green chemistry (PIONEER).
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 09.01.2024
Last edited 18.01.2024
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