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Two-temperature Model of the Non-thermal Chemical Dissociation of CO2

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Abstract
A two-temperature model with a vibrational temperature different from the gas temperature is presented for the decomposition of CO2. All vibrational modes of CO2, CO and O2 are included, and a novel procedure to calculate the vibrational–dissociation reaction rate constant is proposed. In all cases, a Boltzmann distribution is assumed for the vibrational states and the effect of the activation barrier on the chemical reactions is taken into account using the Fridman–Macheret expression. The non-thermal reaction rate constants are therefore functions of gas and vibrational temperatures. The results show that relatively higher vibrational temperatures benefit CO2 conversion. This work provides more insights into the dissociation and recombination reactions of CO2 conversion under non-thermal conditions and offers the opportunity for multi-dimensional non-thermal modelling in the future.
Year of Publication
2025
Journal
Reaction Chemistry and Engineering
Volume
10
Issue
1
Number of Pages
146-157
Date Published
01/2025
Publisher
The Royal Society of Chemistry
DOI
PId
19a01de58df747c64acb1043e77e4e52
Alternate Journal
React. Chem. Eng.
Journal Article
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