Two-temperature model of the non-thermal chemical dissociation of CO 2

A two-temperature model with a vibrational temperature different from the gas temperature is presented for the decomposition of CO 2 . All vibrational modes of CO 2 , CO and O 2 are included, and a novel procedure to calculate the vibrational–dissociation reaction rate constant is proposed. In all c...

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Bibliographic Details
Published in:Reaction chemistry & engineering 2025
Main Authors: Shen, Q., Pikalev, A., Peeters, F. J. J., Gans, J., van de Sanden, M. C. M.
Format: Article
Language:English
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Summary:A two-temperature model with a vibrational temperature different from the gas temperature is presented for the decomposition of CO 2 . All vibrational modes of CO 2 , CO and O 2 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 CO 2 conversion. This work provides more insights into the dissociation and recombination reactions of CO 2 conversion under non-thermal conditions and offers the opportunity for multi-dimensional non-thermal modelling in the future.
ISSN:2058-9883
2058-9883
DOI:10.1039/D4RE00300D