Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Measurements and kinetic modeling of O2 vibrational kinetics in O2–Ar mixtures partially dissociated by a Ns pulse discharge

Journal Article · · Plasma Sources Science and Technology
 [1];  [2];  [2];  [3];  [4]
  1. Ohio State University, Columbus, OH (United States); THE OHIO STATE UNIVERSITY
  2. CNR ISTP (Consiglio Nazionale delle Ricerche Istituto per la Scienza e Tecnologia dei Plasmi), Bari (Italy)
  3. Netherlands Organization for Applied Scientific Research (TNO), RD Geleen (The Netherlands)
  4. Ohio State University, Columbus, OH (United States)
+ Show Author Affiliations
Vibrational kinetics of O2 is studied during the O atom recombination in an O2–Ar mixture, partially dissociated by a burst of ns discharge pulses in a heated plasma flow reactor. The time-resolved temperature in the discharge afterglow is determined by Rayleigh scattering. Time-resolved O atom number density is measured by ps Two-Photon absorption Laser Induced Fluorescence, calibrated in xenon. Time-resolved vibrational level populations of molecular oxygen, O2(v= 8–20), are measured by ps Laser Induced Fluorescence (LIF), with the absolute calibration by NO LIF. Time-resolved ozone number density is monitored by broadband UV absorption. The results are compared with the predictions of a state-specific kinetic model. The experimental data indicate a rapid initial decay of O2(v) populations generated by electron impact in the discharge, due to the vibration-translation (V–T) relaxation by O atoms. This is followed by a slower population reduction, on the time scale much longer compared to that for V–T relaxation or vibration-vibration (V–V) exchange. Both O atoms and the O2(v) populations decay on the same time scale, indicating that chemical reactions initiated by the O atom recombination result in the generation of vibrationally excited O2 molecules. These trends are reproduced by the kinetic model, which shows that the reaction of O atoms with ozone is the dominant pathway of O2(v) generation at the present conditions. The predicted relative O2(v) populations are close to the experimental results, but absolute number densities differ from the experimental data. This is likely due to uncertainties in the absolute calibration of LIF measurements and in the spectroscopic model used in the data reduction. The present work demonstrates the capability for the absolute, time-resolved measurements of vibrationally excited O2 in recombining gas flows, to quantify the energy partition in the recombination reactions.
Research Organization:
The Ohio State University, Columbus, OH (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0020232
OSTI ID:
2566731
Journal Information:
Plasma Sources Science and Technology, Journal Name: Plasma Sources Science and Technology Journal Issue: 1 Vol. 34; ISSN 0963-0252
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (38)

Temperature-Dependent Kinetics of Ozone Production in Oxygen Discharges journal August 2023
Vibrational relaxation of oxygen. State to state rate constants journal December 1992
Calculations of O2 absorption and fluorescence at elevated temperatures for a broadband argon—fluoride laser source at 193 nm journal November 1986
Nonequilibrium dissociation rates behind strong shock waves: classical model journal July 1993
O–O2 state-to-state vibrational relaxation and dissociation rates based on quasiclassical calculations journal July 2008
Dissociation–recombination models in hypersonic boundary layer O2/O flows journal April 2012
Thermochemical nonequilibrium analysis of O2+Ar based on state-resolved kinetics journal January 2015
Rate constants and molecular recombination pathways of oxygen from quasi-classical trajectory simulations of theO3system journal January 2022
Kinetic studies of ozone assisted low temperature oxidation of dimethyl ether in a flow reactor using molecular-beam mass spectrometry journal November 2016
Temperature dependence of the ozone absorption coefficient in the Hartley continuum journal March 1982
Absolute absorption cross sections of ozone in the 185- to 350-nm wavelength range journal January 1986
Chemical Relaxation with Preferential Dissociation from Excited Vibrational Levels journal January 1963
Effect of Dissociation on the Rate of Vibrational Relaxation journal January 1962
Temperature- and species-dependent quenching of NO AΣ+2(v′=0) probed by two-photon laser-induced fluorescence using a picosecond laser journal June 2006
Cross Sections for Electron Collisions with Oxygen Molecules journal March 2009
O 2 ( X , v =8–22) 300 K quenching rate coefficients for O 2 and N 2 , and O 2 ( x ) vibrational distribution from 248 nm O 3 photodissociation journal January 1994
Investigation of oxygen dissociation and vibrational relaxation at temperatures 4000–10 800 K journal July 2013
Vibrational state-specific model for dissociation and recombination of the O2(  3Σg−)+O(  3P) system in DSMC journal February 2019
Shock-tube measurements of coupled vibration–dissociation time-histories and rate parameters in oxygen and argon mixtures from 5000 K to 10 000 K journal July 2020
Coupled vibration-dissociation time-histories and rate measurements in shock-heated, nondilute O2 and O2–Ar mixtures from 6000 to 14 000 K journal May 2021
Quasi-classical trajectory analysis of three-body collision induced recombination in neutral nitrogen and oxygen journal October 2023
Absolute calibration of atomic density measurements by laser-induced fluorescence spectroscopy with two-photon excitation journal July 2001
Solving the Boltzmann equation to obtain electron transport coefficients and rate coefficients for fluid models journal October 2005
Oxygen discharges diluted with argon: dissociation processes journal April 2007
Discharge kinetics of inductively coupled oxygen plasmas: experiment and model journal September 2012
Measurements and kinetic modeling of energy coupling in volume and surface nanosecond pulse discharges journal December 2012
Resonant vibrational-excitation cross sections and rate constants for low-energy electron scattering by molecular oxygen journal February 2013
Measurements and kinetic modeling of atomic species in fuel-oxidizer mixtures excited by a repetitive nanosecond pulse discharge journal December 2017
Kinetics of highly vibrationally excited O 2 ( X ) molecules in inductively-coupled oxygen plasmas journal April 2018
Formation and propagation of ionization waves during ns pulse breakdown in plane-to-plane geometry journal December 2020
Kinetics of metastable N 2 (A 3 Σ u    + , v) molecules in high-pressure nonequilibrium plasmas journal February 2021
Measurement of the two-photon excitation cross-section of the 6p′[3/2]2 and 6p′[1/2]0 levels of Xe I at the wavelengths 224.3 and 222.6 nm journal July 2021
N2 vibrational excitation in atmospheric pressure ns pulse and RF plasma jets journal March 2022
Formation and consumption of HO2 radicals in ns pulse O2–He plasmas over a liquid water surface journal November 2022
Study of the absorption characteristics of molecular oxygen in the Schumann-Runge system at high temperatures: I. Calculations of absorption spectra journal November 2008
Study of the absorption characteristics of molecular oxygen in the Schumann-Runge system at high temperatures: II. Experiment and comparison with calculation journal November 2008
State-to-State Approach in the Kinetics of Air Components Under Re-Entry Conditions journal October 1997
Recombination of oxygen in the vicinity of a silica surface conference January 2024

Similar Records

O{sub 3} photolysis and reactions of O{sub 2}(b{sup 1}S{sub g}{sup +}) with O{sub 3}
Conference · Sat Dec 30 23:00:00 EST 1995 · OSTI ID:215134
Time-resolved CO 2 , CO, and N 2 vibrational population measurements in Ns pulse discharge plasmas
Journal Article · Thu Sep 01 00:00:00 EDT 2022 · Plasma Sources Science and Technology · OSTI ID:1982448
Photochemical kinetics of excited states of O sub 3 and O sub 2 : Laboratory studies and atmospheric implications
Thesis/Dissertation · Mon Dec 31 23:00:00 EST 1990 · OSTI ID:5019675

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
LIF
TALIF
modeling
oxygen
ozone
plasma
vibrational kinetics