Publication
Title
Plasma-based dry reforming of CH₄ : plasma effects vs. thermal conversion
Author
Abstract
In this work we evaluate the chemical kinetics of dry reforming of methane in warm plasmas (1000–4000 K) using modelling with a newly developed chemistry set, for a broad range of parameters (temperature, power density and CO2/CH4 ratio). We compare the model against thermodynamic equilibrium concentrations, serving as validation of the thermal chemical kinetics. Our model reveals that plasma-specific reactions (i.e., electron impact collisions) accelerate the kinetics compared to thermal conversion, rather than altering the overall kinetics pathways and intermediate products, for gas temperatures below 2000 K. For higher temperatures, the kinetics are dominated by heavy species collisions and are strictly thermal, with negligible influence of the electrons and ions on the overall kinetics. When studying the effects of different gas mixtures on the kinetics, we identify important intermediate species, side reactions and side products. The use of excess CO2 leads to H2O formation, at the expense of H2 formation, and the CO2 conversion itself is limited, only approaching full conversion near 4000 K. In contrast, full conversion of both reactants is only kinetically limited for mixtures with excess CH4, which also gives rise to the formation of C2H2, alongside syngas. Within the given parameter space, our model predicts the 30/70 ratio of CO2/CH4 to be the most optimal for syngas formation with a H2/CO ratio of 2.
Language
English
Source (journal)
Fuel. - Guilford
Publication
Guilford : 2024
ISSN
0016-2361
DOI
10.1016/J.FUEL.2023.130650
Volume/pages
360 (2024) , p. 1-15
Article Reference
130650
ISI
001138077700001
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 14.06.2024
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Project info
Surface-COnfined fast-modulated Plasma for process and Energy intensification in small molecules conversion (SCOPE).
Circular CO2 conversion by means of atmospheric plasma (BluePlasma).
Designing the packing materials and catalysts for selective and energy efficient plasma-driven conversion (PLASMACATDESIGN).
Designing the packing materials and catalysts for selective and energy efficient plasma-driven conversion (PLASMACATDESIGN).
Designing the packing materials and catalysts for selective and energy efficient plasma-driven conversion (PLASMACATDESIGN).
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Record
Identifier
Creation 19.12.2023
Last edited 01.02.2024
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