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@ARTICLE{Kotov:909542,
      author       = {Kotov, Vladislav},
      title        = {{V}ibrational relaxation and triggering of the
                      non-equilibrium vibrational decomposition of {CO} 2 in gas
                      discharges},
      journal      = {Plasma sources science and technology},
      volume       = {31},
      number       = {9},
      issn         = {0963-0252},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {FZJ-2022-03231},
      pages        = {094002 -},
      year         = {2022},
      abstract     = {Non-equilibrium vibrational dissociation CO2 → CO + O at
                      translational–rotational temperatures T ⩽ 1200 K is
                      investigated with semi-empiric and computational models. The
                      governing parameter $Q/{n}_{0}^{2}$ has been introduced,
                      where Q is the specific volumetric power coupled into
                      vibrational states and n0 is the initial number density of
                      CO2. It has been shown that the non-equilibrium vibrational
                      process can only be triggered when $Q/{n}_{0}^{2}$ exceeds
                      some critical value determined by the speed of vibrational
                      relaxation. Simple semi-empiric calculations are backed by
                      the state-to-state simulations of the CO2 vibrational
                      kinetics in two-modes approximation performed for conditions
                      of microwave sustained gas discharges. The vibrational
                      kinetics model is benchmarked against the experimental
                      vibrational relaxation times as well as the shock tube data
                      on the rate of the process CO2 + M → CO + O + M for M = Ar
                      and literature data for M = CO2. At T = 300 K the estimated
                      ${\left(Q/{n}_{0}^{2}\right)}_{\text{crit}}\eqsim 6\times
                      1{0}^{-40}$ W m3 or
                      ${\left(Q/{p}^{2}\right)}_{\text{crit}}\eqsim $ 35 W (m−3
                      Pa−2) (p is the gas pressure).
                      ${\left(Q/{p}^{2}\right)}_{\text{crit}}$ is found to always
                      increase with increased T.},
      cin          = {IEK-4},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-4-20101013},
      pnm          = {1232 - Power-based Fuels and Chemicals (POF4-123)},
      pid          = {G:(DE-HGF)POF4-1232},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1088/1361-6595/ac882f},
      url          = {https://juser.fz-juelich.de/record/909542},
}