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  • 1
    Electronic Resource
    Electronic Resource
    Methane conversion by an air microwave plasma (1995)
    Springer
    Plasma chemistry and plasma processing 15 (1995), S. 87-107 
    Details
    ISSN: 1572-8986
    Keywords: Air microwave plasma ; methane activation ; C2 hydrocarbon formation ; carbon monoxide formation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract Activation of methane is carried out by means of an air microwave plasma (2.45 GHz). The experiments cover the absorbed microwave power range 350–650 W (20–50 W cm3 with 17–62%, of methane in the gas mixture, with pressures of 10–66 mbar and flow rates of 140‐700 ml min1. Methane, dioxygen, and dinitrogen consumptions as well as C2 hydrocarbons, carbon monoxide, and dihydrogen yields are analyzed hr gas chromatography. The distance of methane addition from the end of the discharge plays an important role in the composition and the concentration of the products obtained. This distance mainly determines the energy concentrated in the active species of the plasma when they react with methane. A kinetic mechanism jar the activation and decay of inethane and for the formation of C2 hydrocarbons and carbon monoxide is discussed based on the experimental results and kinetic data in the literature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01596683
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  • 2
    Electronic Resource
    Electronic Resource
    Concentrations of Active Species in the Flowing Afterglow of a Nitrogen Microwave Plasma (1998)
    Springer
    Plasma chemistry and plasma processing 18 (1998), S. 447-460 
    Details
    ISSN: 1572-8986
    Keywords: Nitrogen afterglow ; microwave discharge ; nitrogen atom concentration ; metastable nitrogen molecule concentration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract Measurements of nitrogen atom density, by means of NO chemical titration, along with an evaluation of the densities of some excited species N 2 (B, v=11), N 2 (B, v=2), N 2 (C, v=0), and N 2 + (B,v=0), by means of a spectroscopic study of some bands of dinitrogen, are achieved along the flowing afterglow of a dinitrogen microwave plasma (2450 MHz) for several pressures. The concentrations obtained are in the following range: [N]∼10 +15 , [N 2 (B, 2)]∼10 +9 –10 +10 , [N 2 (B, 11)]∼10 +8 –10 +9 , [N 2 (C, 0)]∼10 +6 –10 +7 , [N 2 + (B,0)]∼10 +6 -10 +8 (cm-3). From a kinetic study of the formation and decay of excited and charged species, an estimation of N 2 (A, v), N 2 (X, v, and N 2 + (X) densities can be derived: [N 2 (A, v)]∼10 +12 , [N 2 (X, v≥6)]∼10 +15 –10 +16 , [N 2 (X, v≥12)]∼10 +14 –10 +15 , [N 2 + (X)]∼10 +10 (cm -3 ).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021855131761
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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