Publication
Title
Plasma-assisted dry reforming of CH₄ : how small amounts of O₂ addition can drastically enhance the oxygenate production─experiments and insights from plasma chemical kinetics modeling
Author
Abstract
Plasma-based dry reforming of methane (DRM) into high-value-added oxygenates is an appealing approach to enable otherwise thermodynamically unfavorable chemical reactions at ambient pressure and near room temperature. However, it suffers from coke deposition due to the deep decomposition of CH4. In this work, we assess the DRM performance upon O2 addition, as well as varying temperature, CO2/CH4 ratio, discharge power, and gas residence time, for optimizing oxygenate production. By adding O2, the main products can be shifted from syngas (CO + H2) toward oxygenates. Chemical kinetics modeling shows that the improved oxygenate production is due to the increased concentration of oxygen-containing radicals, e.g., O, OH, and HO2, formed by electron impact dissociation [e + O2 → e + O + O/O(1D)] and subsequent reactions with H atoms. Our study reveals the crucial role of oxygen-coupling in DRM aimed at oxygenates, providing practical solutions to suppress carbon deposition and at the same time enhance the oxygenates production in plasma-assisted DRM.
Language
English
Source (journal)
ACS Sustainable Chemistry and Engineering. - -
Publication
2023
ISSN
2168-0485
DOI
10.1021/ACSSUSCHEMENG.3C04352
Volume/pages
11 :42 (2023) , p. 15373-15384
ISI
001082603900001
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 06.04.2024
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Project info
Designing the packing materials and catalysts for selective and energy efficient plasma-driven conversion (PLASMACATDESIGN).
Surface-COnfined fast-modulated Plasma for process and Energy intensification in small molecules conversion (SCOPE).
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 27.11.2023
Last edited 02.02.2024
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