Numerical Modelling of Dynamic Nitrogen at Atmospheric Pressure in a Negative DC Corona Discharge

Ferouani, Abdel Karim; Liani, B.; Lemerini, M.

doi:10.5772/35167

Cited by 2 publications

(3 citation statements)

References 12 publications

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“…Understanding the operation of plasma reactors used for chemical synthesis and surface treatments of diverse materials, in particular, requires knowledge of the volume and surface kinetics of active species like N, O, N( 2 D), or NO [16][17][18][19][20][21]. On the subject of discharges in oxygen or air, various authors presented theoretical and experimental works [22][23][24][25]. Others were interested to study electron swarm parameters in N 2 /O 2 mixtures which are of great interest in atmospheric physics, pollution control or for application as electrical insulation media [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Modeling Study of Impact Effect of Chemical Reactions on Nitrogen Oxide Conversion in N2/O2 Mixtures under Various O2 Concentrations

Sarah Medjahdi,

Karim Ferouani,

Sahlaoui

et al. 2024

Advancements in Fine Particle Plasmas

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The main objective of this study is to understand the influence of various chemical reactions that participate on NO creation or reduction in N2/O2 mixed gas induced by negative corona discharge under different O2 concentrations (5%, 10%, 15%, 20% and 25%). The basic chemistry of NO evolution that is presented in this study is based on a comprehensive collection of processes that were gathered into 150 specific chemical reactions involving 25 molecular, excited, atomic, and charged entities. Without the diffusion and convective factors, the density was computed using the continuity equation over a range of electric reduction fields between 50 and 90 Td (1Td = 10−21 V.m2), at different points in the ranges 10−9–10−4 s. The outcomes of our numerical simulations demonstrate the impact of various chemical processes on NO production and decrease, including: N(2D) + O2 → NO + O and: NO + O + N2 → NO2 + N2 respectively. Our research has shown that at 50 and 70 Td, nitrogen oxide generation is dominated by an O2 concentration of 5%, whereas at 90 Td, it is dominated by an O2 concentration of 10%. These outcomes are true for both reactions.

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Section: Introductionmentioning

confidence: 99%

Modeling Study of Impact Effect of Chemical Reactions on Nitrogen Oxide Conversion in N2/O2 Mixtures under Various O2 Concentrations

Sarah Medjahdi,

Karim Ferouani,

Sahlaoui

et al. 2024

Advancements in Fine Particle Plasmas

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“…So, the fraction of energy lost during elastic, excitation and ionization processes in the same gas mixture depends on the electric reduced field. For example, at low values less than 120 Td, the energy loss is due to rotational and vibration collisions, where as for values more than 120 Td the energy loss is mainly due to electronic excitation and ionization collisions [21]. …”

Section: Mathematical Modelmentioning

confidence: 99%

“…These effects may also have an immediate impact on the targeted applications like electron beam processes that were significantly studied for treatment of gaseous effluents impure by nitrogen oxides, sulphur [2−4] and/ or ozone production [5−8], medical applications [9−13] and surface treatment [14−15]. Thus, new more efficient depolluting processes are at present studied and the use of non-thermal plasmas created by electron beam or electrical discharge methods [16][17][18][19][20][21][22] appears very attractive. The energetic electrons created by the discharge strike the background gas molecules, thereby making long atomic and molecular free radicals that move with the pollutants and convert them, throughout the post-discharge, into clean or easier to gather product through a fancy set of physical and chemical reactions.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Influence of Reduced Electric Fields on NOx Removal in N2/O2/H2O/CO2 Mixture

Ammar¹,

Lemerini²

2017

JESTR

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The aim of this work is to investigate the time evolution of various species concerned in N 2 /O 2 /H 2 O/CO 2 mixed gas induced by negative corona discharge at atmospheric pressure. This study takes under consideration thirty totally different chemical species taking part in two hundred selected chemical reactions. The density is analyzed by the continuity equation without the diffusion term. In literature it has generally been emphasized that certain radicals N, O, and O 3 influence the NO or NO 2 removal. In this work we complete these studies by analyzing others species such as negative ions O ! ! , O ! ! , O ! ! and radicals OH, HO 2 presents in N 2 /O 2 /H 2 O/CO 2 mixture which they participate in NO x removal. In particular, we tend to analyze the time evolution (10 −9 -10 −3 s) of depopulation rate and rate coefficient of bound reactions, beneath completely different reduced electrical fields within the vary of 100-200 Td (1Td=10 −21 V.m 2 ). The results show that the environmental condition rate of NO, NO 2 and NO 3 is well affected by the increase of reduced electric field and concentration.

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Numerical Modelling of Dynamic Nitrogen at Atmospheric Pressure in a Negative DC Corona Discharge

Cited by 2 publications

References 12 publications

Modeling Study of Impact Effect of Chemical Reactions on Nitrogen Oxide Conversion in N2/O2 Mixtures under Various O2 Concentrations

Modeling Study of Impact Effect of Chemical Reactions on Nitrogen Oxide Conversion in N2/O2 Mixtures under Various O2 Concentrations

Numerical Simulation of Influence of Reduced Electric Fields on NOx Removal in N2/O2/H2O/CO2 Mixture

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