A kinetic study of methane conversion by a dinitrogen microwave plasma

Oumghar, A.; Legrand, J.; Diamy, A. M.; Turillon, N.; Ben-Aim, R. I.

doi:10.1007/bf01447080

Cited by 61 publications

(49 citation statements)

References 37 publications

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“…react with N 2 + , N + , N( 4 S) to form the NH radicals as follows [1,2]. Ion reactions (20) with high rate constant are the major reactions.…”

Section: Excited Dissociation Direct Ionization Of Ch 4 and Formatiomentioning

confidence: 99%

“…The excited methane S 1 (9.6 and 10.4 eV) and S 2 (11.7 eV),which are formed by the electron-methane collisions, are so unstable that rapidly dissociate into radicals such as CH 3 , CH 2 , CH, C. The plasma reactions are as follows [1][2][3]:…”

Section: Excited Dissociation Direct Ionization Of Ch 4 and Formatiomentioning

confidence: 99%

“…NH radicals, which are considered as the ammonia precursors, are formed by the reactions of N 2 + with H 2 , H. Also N atoms adhered to the wall react with hydrogen to form NH radicals [1,2,12].…”

Section: Excited Dissociation Direct Ionization Of Ch 4 and Formatiomentioning

confidence: 99%

“…In 1994, Oumghar, Legrand et al [1][2][3] investigated the conversion of CH 4 by N 2 or air microwave plasma, as well as kinetic mechanism of CH 4 conversion. C 2 hydrocarbons (C 2 H 2 , C 2 H 4 , C 2 H 6 ) and trace amount of HCN, NH 3 were obtained, and the methane conversion rate was 80% within the power range of 350*650 W. Some studies [4,5] reported that ammonia molecules would be formed by the reaction between NH x radicals and hydrogen atoms.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis of Ammonia Using CH4/N2 Plasmas Based on Micro-Gap Discharge under Environmentally Friendly Condition

Bai

Zhang

Bai

et al. 2008

Plasma Chem Plasma Process

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The synthesis of ammonia has been studied in methane-nitrogen plasmas using a micro-gap discharge under an environmentally friendly condition. The effects of some parameters such as the specific input energy, the discharge gap, the volume ratio of CH 4 / N 2 , the residence time, and the gas temperature on the yield of NH 3 and conversion rate of CH 4 are discussed in the paper. The results show that the highest yield of NH 3 is 8000 ppm for a residence time of 1.6 s. In addition, the yield and generating rate of H 2 are 9.1% (v/v) and 1879.8 lmol/min, respectively. Therefore, the micro-gap discharge is an efficient method for NH 3 synthesis and H 2 generation from CH 4.

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“…react with N 2 + , N + , N( 4 S) to form the NH radicals as follows [1,2]. Ion reactions (20) with high rate constant are the major reactions.…”

Section: Excited Dissociation Direct Ionization Of Ch 4 and Formatiomentioning

confidence: 99%

Section: Excited Dissociation Direct Ionization Of Ch 4 and Formatiomentioning

confidence: 99%

Section: Excited Dissociation Direct Ionization Of Ch 4 and Formatiomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of Ammonia Using CH4/N2 Plasmas Based on Micro-Gap Discharge under Environmentally Friendly Condition

Bai

Zhang

Bai

et al. 2008

Plasma Chem Plasma Process

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“…Atmospheric pressure DBD experiments are limited to those reported by Oumghar et al [18,19] who reported C 2 H 2 , C 2 H 4 , C 2 H 6 , HCN and NH 3 to be the most dominant products formed in CH 4 /N 2 plasma. Thus, to date, a wide variety of experiments using discharges to simulate Titan's atmosphere have been reported but the results of such experiments are conflictory in both the product species observed and the chemical synthesis observed.…”

Section: Introductionmentioning

confidence: 95%

Packed Bed DBD Discharge Experiments in Admixtures of N2 and CH4

Horváth

Mason

Polachova

et al. 2010

Plasma Chem Plasma Process

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The physical, chemical and electrical properties of a coaxial Dielectric Barrier Discharge (DBD) fed by various mixtures of N 2 and CH 4 at atmospheric pressure and ambient temperature has been studied. FTIR spectral measurements of the products formed in the discharge have shown that the main chemical products are C 2 H 2, HCN and C 2 H 6 produced by dissociation of CH 4 , with small but significant traces of NH 3 .such a chemical transformation may provide some insight into the chemical processes prevalent in the atmosphere of Titan. During operation of the discharge a solid brown-yellowish deposit was formed on the central rod electrode and the dielectric pellets. Such a deposit is similar to that observed in other N 2 :CH 4 discharges and is believed to be an analogue of the aerosol and dust observed in Titan's atmosphere being composed of chemical species commonly known as 'tholins'.

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