Ozone recovery in the presence of CO and N2O

Aleksei Torbin,Marsel Zagidullin,Michael Heaven,Valeriy Azyazov,Alexander Mebel,Andrey Pershin

doi:10.1051/matecconf/201820900016

Abstract

Extremely reactive vibrationally excited ozone O3(υ) molecule is formed in excess of O2 in particular in air-fuel mixture, however there is a lack of kinetic data on O3(υ) reactions with combustion products. The time-resolved absorption spectroscopy method was applied for measurements of the O3 recovery rates after 266 nm photolysis in the presence of O, CO and nitrous oxides. It was revealed that reaction O3(υ) + O results in an incomplete ozone recovery. In the reaction O3(υ) + O stabilization channel dominates the reactionary one. In the presence of N2O, ozone does not restore to its initial level.

Highlights

Active oxygen species (AOS – ozone O3, molecular singlet oxygen O2(a) (0.98 eV) and О2(b) (1.63 eV), atomic oxygen O(3P) and O(1D) (1.97 eV)) play an important role in the combustion, especially when it is initiated by plasma [1, 2]
This forms a vibrationally-excited ozone molecule O3(υ) which, together with the atomic oxygen may play an important role in the initiation of combustion, recovery of ozone in the atmosphere, etc
The vibrationally excited ozone molecule O3(υ) plays an important role in oxygen containing mixtures, processes involving it should be included into combustion and atmosphere databases

Summary

Introduction

Active oxygen species (AOS – ozone O3, molecular singlet oxygen O2(a) (0.98 eV) and О2(b) (1.63 eV), atomic oxygen O(3P) and O(1D) (1.97 eV)) play an important role in the combustion, especially when it is initiated by plasma [1, 2]. Expanding the limits of combustion and ignition with the increase in the ratio "air/fuel" is one of the most pressing problems in the theory of combustion These limits can be extended by external impact: plasma, chemical or the light (laser). This forms a vibrationally-excited ozone molecule O3(υ) which, together with the atomic oxygen may play an important role in the initiation of combustion, recovery of ozone in the atmosphere, etc. These processes were not previously included in the kinetic scheme of planetary atmospheres, combustion and oxygen-containing plasma. To determine the role of the reaction pathways to the dynamics of ozone in the atmosphere, in the combustion and in oxygen-containing plasma, new kinetic data are required that are not currently available in the literature and databases

Experimental approach

Ozone recovery in the presence of O2

Ozone recovery in the presence of CO

Ozone recovery in the presence of nitrious oxides

Summary