Decomposition of an organophosphorus material in a silent electrical discharge

Clothiaux, E. J.; Koropchak, John A.; Moore, Robert R.

doi:10.1007/bf00567368

Cited by 50 publications

(18 citation statements)

References 4 publications

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“…atomic oxygen O( 1 D), nitrogen metastables). The destruction of toxic [7] or environmentally hazardous molecules by non-thermal discharges has been an active research topic since the 80s: applications were first focused on the removal of inorganic compounds (NOx, SOx) [8] stemming from combustion engine exhausts, and later extended to organic compounds (VOCs), particularly hydrocarbons and solvents commonly used in industry [9][10][11]. The influence of numerous parameters such as carrier gas composition [12], initial concentration of the compound to be removed [13,14], and waveform of the excitation voltage (rise time and amplitude) [15][16][17], has been studied in order to characterize the non-thermal plasma created by gas discharges.…”

Section: Introductionmentioning

confidence: 99%

Decomposition of Gaseous Sulfide Compounds in Air by Pulsed Corona Discharge

Jarrige

Vervisch

2007

Plasma Chem Plasma Process

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The effectiveness of applying a pulsed corona discharge to the destruction of olfactory pollution in air was investigated. This paper presents a comparative study of the decomposition of three representative sulfide compounds in diluted concentrations: hydrogen sulfide (H 2 S), dimethyl sulfide (DMS), and ethanethiol (C 2 H 5 SH), which could be completely removed when a sufficient but reasonable energy density was deposited in the gas. DMS showed the lowest energy cost (around 30 eV/molecules); C 2 H 5 SH and H 2 S had an EC of respectively 45 eV and 115 eV. The efficiency of the non-thermal plasma process increased with decreasing the initial concentration of sulfide compounds, while the energy yield remained almost unchanged. SO 2 was the only identified byproduct of H 2 S decomposition, but the sulfur balance suggests the formation of undetected SO 3 . The byproducts analyzed during the degradation of DMS and C 2 H 5 SH enabled to propose a reaction mechanism, starting with radical attack and breaking of C-S bonds.

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Section: Introductionmentioning

confidence: 99%

Decomposition of Gaseous Sulfide Compounds in Air by Pulsed Corona Discharge

Jarrige

Vervisch

2007

Plasma Chem Plasma Process

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“…Recently, corona discharge emerged as a promising novel technology for the treatment of low concentration of pollutants (volatile organic compounds (VOCs), NO x , SO x ) from stack emissions 1–21. During the last few years a significant progress was achieved in the application of corona discharge plasma for the conversion of VOCs 1–6, silicon‐containing compounds 7, NO x 2, 3, 8–11, and SO x 11–13, and in the understanding of the kinetics of the destruction of these pollutants.…”

Section: Introductionmentioning

confidence: 99%

“…During the last few years a significant progress was achieved in the application of corona discharge plasma for the conversion of VOCs 1–6, silicon‐containing compounds 7, NO x 2, 3, 8–11, and SO x 11–13, and in the understanding of the kinetics of the destruction of these pollutants. Initial research on the decontamination of organophosphorus compounds (OPCs), simulants of sarin in corona discharge, was performed in the mid‐80s 14–17. Fraser, et al 15–17 determined hydrocarbons as DMMP (dimethyl methyl phosphonate) destruction products.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of destruction of diisopropyl methylphosphonate in corona discharge

Коробейничев

Чернов

Соколов

et al. 2002

Int J of Chemical Kinetics

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The kinetics of the destruction of diisopropyl methylphosphonate (DIMP) in corona discharge has been studied using a flow tubular coaxial wire dielectric barrier corona discharge reactor. The identification and quantitative determination of DIMP, its destruction intermediates, and phosphorus-containing destruction products were performed using molecular beam mass spectrometry and gas chromatography/mass spectrometry. Active discharge power was varied in the range 0.01-5 W. The destruction products such as isopropyl methylphosphonate, methylphosphonic acid, and orthophosphoric acid were found on the reactor walls. The dependence of the extent of the destruction, D(D = 1 − X /X 0 , where X and X 0 are DIMP mole fractions at the outlet and the inlet of the reactor), on the specific energy deposition E x (E x = PF −1 X 0 −1 , where F is the carrier gas flow and P is the power dissipated in discharge reactor) was measured over the DIMP mole fraction range 60-500 ppm at the pressure of 1 bar and the temperature of 340 K. Over the range of the experimental conditions studied the destruction obeys the "pseudo-first-order" kinetic law: ln(1 − D) = −KE x . Plausible mechanisms of the destruction are discussed. It was concluded that ion mechanism is the major one responsible for the destruction process.

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“…On the other hand, many researchers have studied the decomposition of hazardous air pollutants (HAPs) using various types of nonthermal plasma reactors [4][5][6][7][8][9][10][11][12][13], and it was reported that the kind and the amount of products depended on the structure of reactor and the discharge type. However, the comparison and evaluation between those methods under the same operating conditions, e.g., residence time, the concentration of reactants, applied power, and so on, was not sufficient at the present stage.…”

Section: Introductionmentioning

confidence: 99%

Decomposition of benzene in air by plasma reactor-effect of reactor type and operating conditions

Ogata¹,

Miyamae²,

Mizuno³

et al.

Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248)

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The decomposition of benzene was carried out using two types of plasma reactors packed with BaTiO 3 pellets: one had two electrodes made of stainless steel (SUS-reactor) and the other had glass layer between two concentric electrodes (GL-reactor). It was found that the decomposition efficiency and the suppression of N 2 O and NOx formations in the GL-reactor were greater than those in the SUS-reactor. On the contrary, the suppression of O 3 formation and the oxidation to COx in the SUS-reactor were superior to those in the GL-reactor. Furthermore, the effect of operating conditions, i.e., waveform and frequency of applied ac power, was also investigated using both the reactors.

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Decomposition of an organophosphorus material in a silent electrical discharge

Cited by 50 publications

References 4 publications

Decomposition of Gaseous Sulfide Compounds in Air by Pulsed Corona Discharge

Decomposition of Gaseous Sulfide Compounds in Air by Pulsed Corona Discharge

Kinetics of destruction of diisopropyl methylphosphonate in corona discharge

Decomposition of benzene in air by plasma reactor-effect of reactor type and operating conditions

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