Plasma chemistry of fossil fuels

Venugopalan, M.; Roychowdhury, Uptal K.; Chan, Katherine; Pool, M. L.

doi:10.1007/bfb0048493

Cited by 8 publications

(4 citation statements)

References 114 publications

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“…The solid peat residue collected at the bottom of the reactor presented the aspect of a non-sticking, free-flowing powder or soot. This finding is consistent with the fact that soot, rather than tarry particles, is typically obtained when coal is treated with a plasma flame (Venugopalau et al, 1980). During the calcination operation which was carried out in order to determine their ash content, it was observed that the residues burned without smoke and with little colour, suggesting a clear coke, low in hydrocarbons.…”

Section: Comments On the Solid Residuesupporting

confidence: 82%

Gasification of peat in a steam plasma reactor

Matons¹,

Gauvin²

1985

Can J Chem Eng

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The gasification of finely‐divided peat (30‐micron and 48‐micron sizes respectively, and 11.4% moisture) was studied in a reactor 30.5‐cm ID and 178‐cm high, in the presence of a plasma flame consisting of nitrogen and steam, at an initial temperature of 4000 K, decreasing to 1200 K in the reaction zone. For a carbon‐to‐steam molar ratio of 1.37, a conversion of 81% of the carbon was achieved, yielding a gas analyzing 43% H2, 44% CO, 8% CO2, 4% CH4 and 1% C2H6, with a calorific value of 266 kJ/g mol (319 Btu/ft3). The results indicated that higher temperatures and a lower C/H2O ratio were required to achieve near total carbon conversion.

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Section: Comments On the Solid Residuesupporting

confidence: 82%

Gasification of peat in a steam plasma reactor

Matons¹,

Gauvin²

1985

Can J Chem Eng

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“…For the latter situation, the coke should have a lower C/H ratio than the former. A literature reported that there was solid (CH) n deposited on the cathode during methane decomposing in glow discharge, 27 and it is generally believed that coke forms via dehydrogenation of aromatics in thermal coupling of methane. 28 Experimentally, according to element microanalysis, the C/H ratio in coke is 85.6/4.4, indicating the coke mainly consists of carbon.…”

Section: Resultsmentioning

confidence: 99%

Carbon Dioxide Reforming of Methane Using DC Corona Discharge Plasma Reaction

Tian

et al. 2004

J. Phys. Chem. A

158

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Carbon dioxide reforming of methane via dc corona discharge plasma reaction at atmospheric pressure has been investigated. The effects of the CH 4 /CO 2 ratio in the feed, flow rate, discharge power, and corona types have been systematically studied. The results show that the molar ratio of H 2 to CO in the products strong depends on the molar ratio of CH 4 to CO 2 in the feed. The discharge power, flow rate, and corona types have slight influence on the syngas composition. When the CH 4 /CO 2 ratio is 1/2, the syngas of lower H 2 /CO ratio at about 0.56 is obtained, which is a potential feedstock for synthesis of liquid hydrocarbons. The conversions of methane and carbon dioxide increase with increasing the discharge power and decrease with increasing the flow rate. The conversions of reactants via positive corona are generally higher than that via negative corona, but the ratio of H 2 /CO in the products is the other way round. Besides syngas and water, other products including various hydrocarbons and oxygenates are detected by a quadrupole mass spectrometer. There is visible coke mainly depositing on the cathode when the CH 4 /CO 2 ratio is higher than 2/1. We propose that the coke mainly formed via methane decomposition during the reaction.

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“…La figure 11 donne un schéma théorique de ces trois séquences, leur ordre possible ainsi que leur rôle [61]. Un des principaux problèmes est celui du mélange des réactifs avec le plasma qui conformément au schéma peut se faire avant ou après le générateur.…”

Section: Les éQuilibres Chimiques Et Les Fonctions Thermodynamiquesunclassified

La Chimie Des Plasmas Et Ses Débouchés a Court Terme Sur Des Synthèses Inorganiques a Caractère Industriel

Fauchais

Bourdin

1977

J. Phys. Colloques

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Résumé. -La première partie de cet article est consacrée à une description essentiellement qualitative des diverses connaissances fondamentales, empiriques et semi-empiriques que l'on possède actuellement dans le domaine de la Chimie des Plasmas. Compte tenu de l'étendue considérable de ce sujet, nous nous sommes souvent restreints au cas des plasmas thermiques, en particulier dans la seconde partie où nous présentons une série d'exemples d'application qui ont été développés dans le secteur industriel. Ces exemples couvrent aussi bien le cas des réactions gaz-gaz dans un arc électrique (synthèse de l'acétylène) que celui des réactions gaz-solides (traitement de zircon pour l'obtention de zircone, fours d'extraction de minerais de fer ou de ferroalliages). Un accent particulier a été mis sur l'importance des études économiques de ces techniques de pointe.Abstract. -The first part of this paper is devoted to qualitative description of the different fundamental, empirical and semi-empirical knowledges that one have nowadays in the field of Plasma Chemistry. On account of the extend of this subject we have often been constrained to restrict these considerations to thermal plasmas, in particular in the second part devoted to some examples coming from industrial state. These examples deals with the case of gas-gas reactions in electric arcs (acetylene synthesis), and with the case of solid-gas reactions (treatment of zircon ZrSi04 for the obtainment of zirconia ZrO,, extractive metallurgy with iron or ironalloys ores). A particular effort has been pointed on the economical aspect of these up to date technics.

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Plasma chemistry of fossil fuels

Cited by 8 publications

References 114 publications

Gasification of peat in a steam plasma reactor

Gasification of peat in a steam plasma reactor

Carbon Dioxide Reforming of Methane Using DC Corona Discharge Plasma Reaction

La Chimie Des Plasmas Et Ses Débouchés a Court Terme Sur Des Synthèses Inorganiques a Caractère Industriel

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