The Reaction between Nitric Oxide and Atomic Oxygen.

1935 ◽  
Vol 17 (3) ◽  
pp. 409-412 ◽  
Author(s):  
W. H. Roodebush
Keyword(s):  
1988 ◽  
Vol 92 (18) ◽  
pp. 5266-5270 ◽  
Author(s):  
G. R. Bradburn ◽  
H. V. Lilenfeld

2016 ◽  
Vol 30 (4) ◽  
pp. 912-918 ◽  
Author(s):  
Craig T. Johansen ◽  
Daniel A. Lincoln ◽  
Brett F. Bathel ◽  
Jennifer A. Inman ◽  
Paul M. Danehy

Author(s):  
Moon Soo Bak ◽  
Mark A. Cappelli

A simulation is developed to investigate the kinetics of nitric oxide (NO) formation in premixed methane/air combustion stabilized by nanosecond-pulsed discharges. The simulation consists of two connected parts. The first part calculates the kinetics within the discharge while considering both plasma/combustion reactions and species diffusion, advection and thermal conduction to the surrounding flow. The second part calculates the kinetics of the overall flow after mixing the discharge flow with the surrounding flow to account for the effect that the discharge has on the overall kinetics. The simulation reveals that the discharge produces a significant amount of atomic oxygen (O) as a result of the high discharge temperature and dissociative quenching of excited state nitrogen by molecular oxygen. This atomic oxygen subsequently produces hydroxyl (OH) radicals. The fractions of these O and OH then undergo Zel’dovich reactions and are found to contribute to as much as 73% of the total NO that is produced. The post-discharge simulation shows that the NO survives within the flow once produced.


The air afterglow has been studied in a flow system by mixing the products of a microwave discharge in oxygen with NO or mixtures of gases and by measuring the intensity of the glow immediately past the point of mixing and farther downstream in a long glass tube at known pressure, composition, and linear velocity of flow. The intensity of the greenish yellow chemiluminescence is shown to be proportional to the concentrations of atomic oxygen and nitric oxide, and independent of the nature or amount of added inert gases. An average quantum (5500 Å) is emitted for every 10 7 collisions of O with NO. The concentration of atomic oxygen is determined by a 'titration with NO 2 in which the end-point is indicated by complete extinction of the glow all along the tube, and which is made possible by the great speed of the reaction O + NO 2 → O 2 + NO. Observation of the spatial decay of the glow under steady-state conditions is well suited to the study of reactions of atomic oxygen. The concentration of NO remains constant along the tube because reaction (1) quickly regenerates NO from NO 2 , and the light intensity directly measures the concentration of atomic oxygen. The method is applied to give information on the rates of the reactions O + NO + M → NO 2 + M , O + O 2 + M → O 3 + M , O + SO 2 + M → SO 3 + M , etc. Some results are also presented for the effect on the disappearance of O of the following added gases: N 2 , A, CO 2 , H 2 , CO, N 2 O, C 6 H 8 , SO 3 , Fe(CO) 5 , H 2 O, O 3 , C 2 H 4 , Cl 2 and Br 2 . The rapid catalytic recombination of O by added Cl 2 is discussed in some detail.


The catalysis of the combustion of hydrogen and oxygen by nitrogen peroxide was first discovered by Dixon, and later studied quantitatively by Gibson and Hinshelwood, Thompson and Hinshelwood, and by Norrish and Griffiths. Thompson and Hinshelwood found that the ignition temperature of hydrogen was depressed by over 100° C by the addition of less than 0·1% (0·1 mm) of nitrogen peroxide, but that this sensitized ignition was confined within a narrow range of pressures of nitrogen peroxide, the upper limit increasing with rise of temperature and decreasing with increasing pressure, whilst the lower limit was only slightly affected. Norrish and Griffiths found that, within similar limits of pressure of nitrogen peroxide, rapid reaction but no explosion occurred when an axial tube was used for the inlet of gas. This reaction was accelerated by irradiation with light which decomposes nitrogen peroxide to nitric oxide atomic oxygen, but not by light which is absorbed without producing photochemical decomposition. Without the axial tube, explosions occurred, but the ignition temperature was not affected by irradiation.


1999 ◽  
Vol 17 (11) ◽  
pp. 1439-1446 ◽  
Author(s):  
C. H. A. von Savigny ◽  
I. C. McDade ◽  
G. G. Shepherd ◽  
Y. Rochon

Abstract. Vertical profiles of nitric oxide in the altitude range 90 to 105 km are derived from 553 nm nightglow continuum measurements made with the Wind Imaging Interferometer (WINDII) on the Upper Atmosphere Research Satellite (UARS). The profiles are derived under the assumption that the continuum emission is due entirely to the NO+O air afterglow reaction. Vertical profiles of the atomic oxygen density, which are required to determine the nitric oxide concentrations, are derived from coordinated WINDII measurements of the atomic oxygen OI 557.7 nm nightglow emission. Data coverage for local solar times ranging from 20 h to 04 h, and latitudes ranging from 42°S to 42°N, is achieved by zonally averaging and binning data obtained on 18 nights during a two-month period extending from mid-November 1992 until mid-January 1993. The derived nitric oxide concentrations are significantly smaller than those obtained from rocket measurements of the airglow continuum but they do compare well with model expectations and nitric oxide densities measured using the resonance fluorescence technique on the Solar Mesosphere Explorer satellite. The near-global coverage of the WINDII observations and the similarities to the nitric oxide global morphology established from other satellite measurements strongly suggests that the NO+O reaction is the major source of the continuum near 553 nm and that there is no compelling reason to invoke additional sources of continuum emission in this immediate spectral region.Key words. Atmospheric composition and structure (airglow and aurora; thermosphere – composition and chemistry; instruments and techniques)


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