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Title
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The effect of H₂O on the vibrational populations of CO₂ in a CO₂/H₂O microwave plasma : a kinetic modelling investigation
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Author
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Abstract
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| Plasma has been studied for several years to convert CO(2)into value-added products. If CO(2)could be converted in the presence of H2O as a cheap H-source for making syngas and oxygenates, it would mimic natural photosynthesis. However, CO2/H2O plasmas have not yet been extensively studied, not by experiments, and certainly not computationally. Therefore, we present here a kinetic modelling study to obtain a greater understanding of the vibrational kinetics of a CO2/H2O microwave plasma. For this purpose, we first created an electron impact cross section set for H2O, using a swarm-derived method. We added the new cross section set and CO2/H2O-related chemistry to a pure CO(2)model. While it was expected that H2O addition mainly causes quenching of the CO(2)asymmetric mode vibrational levels due to the additional CO2/H2O vibrational-translational relaxation, our model shows that the modifications in the vibrational kinetics are mainly induced by the strong electron dissociative attachment to H2O molecules, causing a reduction in electron density, and the corresponding changes in the input of energy into the CO(2)vibrational levels by electron impact processes. |
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Language
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English
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Source (journal)
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Plasma sources science and technology / Institute of Physics [Londen] - Bristol, 1992, currens
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Publication
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Bristol
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Institute of Physics
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2020
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ISSN
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0963-0252
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DOI
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10.1088/1361-6595/ABA1C8
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Volume/pages
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29
:9
(2020)
, 24 p.
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Article Reference
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095009
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ISI
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000570601300001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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Full text (publisher's version - intranet only)
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