Nonthermal Plasma Reactions of Dilute Nitrogen Oxide Mixtures:  NO_x in Nitrogen

Abstract

A lumped kinetic model of a pulsed corona discharge reactor, where the high-voltage dischargeinduced electron density fluctuation and hence the electron collision rate fluctuation are approximated with a uniform electron distribution and a new Arrhenius-type rate model, is found to capture the effect of power input, NO x composition, and residence time. An N atom and N 2 (A) are found to control the conversion of nitrogen oxides and the evolution of byproducts; the N atom controls the NO conversion, N 2 (A) controls the N 2 O conversion, and the N atom and N 2 (A) control the NO 2 conversion.

Laser-Induced Fluorescence (LIF) Probe for In-situ Nitric Oxide Concentration Measurement in a Non-thermal Pulsed Corona Discharge Plasma Reactor

“…FTIR-derived data for the reactor effluent are used to optimize the model parameters α and β. The chemical reactions proposed earlier (15) are listed in Table III Figure 10 shows that the calculated data of NO and NO 2 agree with the experimental data for all three initial NO concentrations at the outlet of the reactor, and these were the only nitrogen oxides detected in the FTIR spectra. The experimental measurement error is within ±10%, which is reflected in the error bars shown in Fig.…”

“…(13) The electron-molecule impact rates depend on the concentration of electrons as well as their energy distribution. Such rates underlie a preliminary kinetic model developed by Hu et al (14) and improved by Zhao et al, (15) which was found to fit experimental data. That kinetic model was found to capture the concentration profiles of different nitrogen oxides (NO, NO 2 and N 2 O) at the outlet of the reactor for a four-tube reactor for NO in N (15) 2 and NO in Ar.…”

“…A PCR kinetic model was described in detail by Zhao et al (15) In brief, the PCR reactions are divided into two categories: electron-molecule reactions and bulk molecule-molecule reactions.…”

“…From among all the possible bulk reactions involving radicals, ions, molecules, and their excited states, for example, as many as 287 reactions and 37 species for a system of NO in N 2 analyzed by Penetrant, (1) only 18 bulk reactions for NO in N 2 (shown in Table II (15) ) and 12 bulk reactions for NO in Ar (shown in Table III (16) ) are selected for the model. This is based on our previous analysis of the criteria for selecting bulk reactions: (15) reactions having high rates and high concentrations of reactants are selected, while those with low concentrations of reactants or low rates are eliminated.…”

“…(15) In this work, a two-tube reactor is used to test the model on a different configuration and inside the reactor. An optimization method (5) is used to fit the model parameters α and β from these experiments with NO in N 2 based on FTIR measurement data.…”