Modelling the low-pressure N2-O2 plasma afterglow to determine the kinetic mechanisms controlling the UV emission intensity and its spatial distribution for achieving an efficient sterilization process

K. Kutasi, Bachir Saoudi, Carlos D. Pintassilgo, Jorge Loureiro, Michel Moisan

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

The flowing afterglow of a N2-O2 microwave discharge intended to provide intense and spatially uniform UV emission for an efficient inactivation of bacterial spores is modelled with a 3-D hydrodynamic model leading to the spatial density distribution of the species in the reactor. The agreement of the calculated densities of the NO(A) and NO(B) UV emitting species with the corresponding measured emission intensities strongly supports the choice of the kinetic reactions retained in the model. In that respect, the specific contribution of N and O atoms to the spatial distribution of the NO(A) density (generating the NOγ system) in the late afterglow is, for the first time, brought into relief. A graph is presented.

Original languageEnglish
Pages (from-to)840-852
Number of pages13
JournalPlasma Processes and Polymers
Volume5
Issue number9
DOIs
Publication statusPublished - Nov 14 2008

Fingerprint

afterglows
Spatial distribution
spatial distribution
low pressure
Plasmas
spores
Kinetics
kinetics
Catalyst supports
Reaction kinetics
deactivation
density distribution
reaction kinetics
Hydrodynamics
hydrodynamics
reactors
Microwaves
microwaves
Atoms
atoms

Keywords

  • Afterglow plasma processes
  • Density
  • Hydrodynamic modelling
  • Kinetics
  • Microwave discharges
  • Sterilization
  • UV irradiation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Polymers and Plastics

Cite this

Modelling the low-pressure N2-O2 plasma afterglow to determine the kinetic mechanisms controlling the UV emission intensity and its spatial distribution for achieving an efficient sterilization process. / Kutasi, K.; Saoudi, Bachir; Pintassilgo, Carlos D.; Loureiro, Jorge; Moisan, Michel.

In: Plasma Processes and Polymers, Vol. 5, No. 9, 14.11.2008, p. 840-852.

Research output: Contribution to journalArticle

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AU - Loureiro, Jorge

AU - Moisan, Michel

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AB - The flowing afterglow of a N2-O2 microwave discharge intended to provide intense and spatially uniform UV emission for an efficient inactivation of bacterial spores is modelled with a 3-D hydrodynamic model leading to the spatial density distribution of the species in the reactor. The agreement of the calculated densities of the NO(A) and NO(B) UV emitting species with the corresponding measured emission intensities strongly supports the choice of the kinetic reactions retained in the model. In that respect, the specific contribution of N and O atoms to the spatial distribution of the NO(A) density (generating the NOγ system) in the late afterglow is, for the first time, brought into relief. A graph is presented.

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