Effect of reactant ion internal and translational energy on the rate constants of the charge exchange reactions: CO2++O2→O2+ +CO2 and O2++O2→O2+O2+

Abstract

Articles you may be interested inEffects of rotational, vibrational, and translational energy on the rate constants for the isotope exchange reactions OH−+D2 and OD−+H2 Temperature, kinetic energy, and internal energy dependences of the rate constant and branching fraction for the reaction of O+ (4 S) with CO2 Effect of reactant ion internal and translational energy on the rate constants of the charge exchange reactions: cot + 02---+0t + CO 2 and ot + O 2 ---+0 2 + otThe rate constants of the charge exchange reactions CO 2 + + O 2 -0 2 + + CO 2 and ot + 02~2 + ot have been studied as a function of both the internal and kinetic energies of the reactant ion in a tandem ICR spectrometer. Primary ions with known internal energies are formed in the source of the tandem by charge transfer reactions whose energy partitioning has already been determined. The rate constant of the cot + O 2 reaction is found to be 4.4 X 10-11 cm 3 S-I for ground state primary ions and increases by a factor of 2.9 when cot ions have 1.4 e V of internal energy; this reaction is also found to be much less sensitive to the kinetic energy of the parent ion than to its internal energy. The rate constant for the symmetric charge exchange reaction ot + O 2 has been determined for internal energies corresponding approximately to the v = 0, 3, and 9 vibrational levels of the ot ground electronic state and is found to increase with internal energy, at least at low collision energy.

A mass-selective ion transfer line coupled with a uniform supersonic flow for studying ion–molecule reactions at low temperatures

“…61 For instance, the effect of vibrational excitation of O + 2 on the rate coefficient of the charge ex-A c c e p t e d M a n u s c r i p t change reaction O + 2 + O 2 has been shown to enhance the reactivity. 62 Here the rate coefficients and branching ratios show overall a good agreement with previous work, providing additional evidence for the effective thermalization of the selected ions inseminating the de Laval expansion. We can therefore consider that no excited states of either Ar + or O + 2 were interfering with the kinetic measurements.…”

CO2dissociation using the Versatile atmospheric dielectric barrier discharge experiment (VADER)

“…The relevant electron-CO 2 collision reactions and their corresponding cross-sections are tabulated in Lindon [6]. The cross-sections were obtained from Itikawa [12], Anzai et al [27], Seiersen et al [28], McConkey et al [15], Itikawa [29], Peverall et al [30], Sheehan and St Maurice [31], Rosén et al [32], Rapp and Briglia [33], Schulz [34], Zecca et al [35], Rejoub et al [36], Derai et al [37], Flesch and Ng [38], and Flesch et al [39]. A minimum electron density of n e = 10 12 cm −3 was assumed to provide a lower limit on the important reaction rates occurring within the streamer.…”

“…Gas flow through the reaction volume was regulated using a set of MKS 500 and 100 SCCM mass flow controllers supplying CO 2 and Ar, respectively. The pressure within the reaction box was monitored with an Ashcroft compound vacuum pressure gauge and regulated using a throttling valve (needle valve) attached to a Pfeiffer Xtra dry vacuum pump.…”

“…The consequences of global warming include ocean acidification, a reduction in arctic ice cap thicknesses and a global increase in severe weather events [1]. Sixty percent of the current global warming trends can be correlated with increased CO 2 emissions from the industrialization of countries and 90% of CO 2 emissions come from the burning of fossil fuels [2]. The largest source of CO 2 emission is from large emission sources, such as power plants (∼41%).…”

“…Section 2 reviews the dissociation chemistry of CO 2 , followed by a set of models of the DBD dynamics and chemistry important for CO 2 dissociation. The model was compared to the results of the Versatile Atmospheric dielectric barrier Discharge ExpeRiment (VADER).…”