Assessing the non-equilibrium in $N_{2}$ and $N_{2}$ - $CO_{2}$ microwave plasma by laser Raman scattering.

Gatti N., Ponduri S., van den Bekerom D.C.M., Martini L.M., DiLecce G., van Rooij G.J., Tosi P.
  Venerdì 15/09   15:30 - 18:30   Aula A224   II - Fisica della materia
Microwave plasma reactors are attractive because of their low inertia, low investment cost and ability to selectively couple energy into molecular vibrations. Used for the production of nitrogen-based fertilizers and synthetic fuels, these systems show efficiencies that depend on a delicate balance between electron, vibrational and rotational temperatures. If the right combination of these temperatures is reached, the non-equilibrium is effective and the vibrationally excited molecules will undergo highly efficient chemical reactions. The reactor is investigated by Raman scattering yielding profiles of rotational and vibrational temperatures. The latter exceeds by three times the former revealing the non-equilibrium.