Atomic oxygen recombination on fused silica: modelling and comparison to low-temperature experiments (300 K)^*

Abstract

This work is devoted to the study of atomic oxygen recombination on a glass surface, mainly in connection with atomic sources development. In this paper we present a non-stationary model for atomic oxygen recombination on a fused silica surface. Kinetics equations for oxygen atoms, taking into account heterogeneous reactions between gaseous atoms and the surface (Eley-Rideal mechanisms), as well as homogeneous processes involving surface migration of adsorbed species (Langmuir-Hinshelwood mechanisms), are solved. Surface reaction coefficients are calculated, and the choice of numerical values for surface parameters is discussed. The solution to the equations is compared to our previous experiments concerning the influence of the surface state on atomic recombination. An estimation is made of surface reaction coefficient values.

Characteristics of the Decomposition of CO2 in a Dielectric Packed-Bed Plasma Reactor

“…Due to the complex nature of the dielectric surface, it is difficult to compute the probability for even such ''simple'' reactions at atom recombination. However, based on the references about heterogeneous reactions of the recombination of O radicals and the combination of CO with O radicals, it is suggested that the formation of O 2 molecules prevails over the combination of CO and O radicals on solid surfaces [24,34,35]. The positive role of solid surfaces provided by dielectric pellets was further confirmed in ''Influence of the Discharge Length on the Decomposition of CO 2 ''.…”

Oxygen plasma functionalization of poly(p-phenilene sulphide)

“…The discharge vessel is a cylinder with the length of 400 mm and the diameter of 40 mm, made from a borosilicate glass with a low recombination coefficient for reaction O + O ! O 2 [12][13][14]. On one side, it is pumped with the vacuum pump with the nominal pumping speed of 16 m 3 /h, while on the other side commercially available oxygen is leaked through a precise leak valve.…”

Recombination of oxygen atomic excited states produced by non-equilibrium RF plasma on different semiconductor materials: catalytic phenomena and modelling

“…Well stirred reactors are characterised by constant reactor volume, mass flow rate, surface area, inlet composition and temperature, as well as the power induced into the plasma for non-thermal systems. Most of the contributing parameters were determined from the literature [21][22][23][24][25][26][27] and the experimental results.…”