Plasmachemical and heterogeneous processes in ozonizers with oxygen activation by a dielectric barrier discharge

Oxygen atom and ozone kinetics in the afterglow of a pulse-modulated DC discharge in pure O2: an experimental and modelling study of surface mechanisms and ozone vibrational kinetics

“…The possibility of such a cyclic mechanism of ozone surface destruction is discussed by Mazankova et al [39] for alumina and copper surfaces previously treated by ozone. Mankelevich et al [7] studied ozone loss on Al 2 O 3 surfaces, and suggested a mechanism consisting of the formation of a layer of chemisorbed O 3 (attached to surface Al atoms) followed by O 3 phyisorption (O 3phys ) and further reactions of O 3phys with incident ozone molecules.…”

“…The radicals, ions and other active species produced in them are useful for many applications including: cleaning of various surfaces [1], sterilisation of medical devices [2], plasma-based water treatment [3], chemical vapour deposition of metal oxide films [4], etching of various materials and resist stripping in microelectronics [5]. Numerous gas-phase and surface reactions [6,7] are involved in the production and loss of the important active species, including oxygen atoms and ozone molecules which are the focus of this study. Various techniques have been developed to probe oxygen atom concentrations: VUV absorption [8][9][10][11], optical emission [12], optical emission actinometry [9,13], two-photon laser induced fluorescence [14], and, most recently, cavity ringdown spectroscopy (CRDS) [15].…”

Study of oxygen and ozone reactions on surfaces previously treated by ozone

“…However, this effect was not discussed in this study. Ozone decomposition on manganese oxide catalyst was studied by Li et al 22) and heterogeneous destruction of ozone was also suggested and studied by Horvath et al 23) Heterogeneous process of ozone loss was also thoroughly discussed by Mankelevich et al 24) Close to the topic of this paper are the studies of surface oxidation of NO into NO 2 . Guaitella et al 25) studied experimentally the surface oxidation of NO into NO 2 by adsorbed O atoms on Pyrex surface which was previously treated by a RF oxygen discharge at low pressure.…”

O2(b1Σg+) Removal by H2, CO, N2O, CH4, and C2H4 in the 300–800 K Temperature Range

“…Gas phase processes involving oxygen molecules in the electronically excited state b 1 Σ g + have been studied extensively due to their importance in the terrestrial atmosphere, − oxygen-containing gas discharges, − the active medium of an oxygen–iodine laser, , and combustion. − Currently, a nonequilibrium plasma discharge has been actively studied − in view of its potential applications to ignition and flame stabilization. An important point is that plasma–chemical processes result in the formation of highly reactive atoms, radicals, and excited molecules including O 2 . ,,, In particular, plasma–chemical processes in air–fuel mixtures result in the formation of O 2 (b 1 Σ g + ) molecules that may activate chain reactions in the combustion zone .…”