Pooling through cooling: creating optimal vibrational non-equilibrium in CO2 by supersonic expansion

We present a quasi-1D model to study the influence of supersonic expansion on the non-equilibrium vibrational distribution function in CO2, relevant for the energy efficient splitting of CO2. The model includes 21 vibrational levels and state-to-state vibrational kinetics. It is found that the amoun...

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Bibliographic Details
Published inJournal of physics. D, Applied physics Vol. 50; no. 19
Main Authors Peerenboom, Kim, Khaji, Maryam, Degrez, Gérard
Format Journal Article
LanguageEnglish
Published IOP Publishing 13.04.2017
Subjects
non-equilibrium
supersonic expansion
Treanor distribution
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Summary:We present a quasi-1D model to study the influence of supersonic expansion on the non-equilibrium vibrational distribution function in CO2, relevant for the energy efficient splitting of CO2. The model includes 21 vibrational levels and state-to-state vibrational kinetics. It is found that the amount of non-equilibrium after the expansion is strongly dependent on the nozzle geometry. The highest degree of non-equilibrium is found for moderate Mach numbers. The inflow pressure appears to have a negligible effect on the degree of non-equilibrium. Lowering the inflow temperature has a beneficial effect on the vibrational distribution function.
Bibliography:JPhysD-112207.R1
ISSN:0022-3727
1361-6463
DOI:10.1088/1361-6463/aa695e