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  • General Chemistry  (2)
  • Physics Chemistry  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Rußbildung in vorgemischten Kohlenwasserstoff-Flammen (1968)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 80 (1968), S. 425-438 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die für die Rußbildung kritischen Brennstoff-Sauerstoff-Verhältnisse von verschiedenen Kohlenwasserstoffen sowie deren Abhängigkeit von Druck und Temperatur werden diskutiert. Am Beispiel der Rußbildung in Bunsenflammen wird gezeigt, daß außerdem der Form und der Struktur der Flammenfront ein entscheidender Einfluß zukommt. In der Reaktionszone von „fetten“ Kohlenwasserstoff-Flammen entstehen ungesättigte Verbindungen, deren Konzentrationsprofile quantitative Rückschlüsse auf ihre Bedeutung bei der Rußbildung gestatten. Der „Mechanismus“ der Rußbildung wird auf der Grundlage der Konzentrationen höherer Kohlenwasserstoffe und des Verlaufs von Rußteilchenzahl und -größe besprochen. Auch die Wirkung von elektrischen Feldern auf die Rußbildung wird untersucht.
    Additional Material: 17 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19680801103
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Soot Formation in Premixed Hydrocarbon Flames (1968)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 7 (1968), S. 414-427 
    Details
    ISSN: 0570-0833
    Keywords: Soot ; Hydrocarbon flames ; Flames ; Combustion ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The critical fuel-oxygen ratio for soot formation and its dependence on temperature and pressure are discussed for various hydrocarbons. It is shown in the case of the Bunsen flame that the shape and structure of the flame front also have a decisive effect on soot formation. In the reaction zone of fuel-rich hydrocarbon flames, unsaturated compounds are formed, and the concentration profiles of these products can provide quantitative information about their importance in soot formation. The “mechanism” of soot formation is discussed on the basis of the concentrations of higher hydrocarbons and the variation of the number and size of the soot particles. The effects of electric fields and foreign additives on soot formation have been given consideration.
    Additional Material: 17 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.196804141
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Reactions of atomic nitrogen and atomic hydrogen with methylacetylene (1970)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 2 (1970), S. 457-473 
    Details
    ISSN: 0538-8068
    Keywords: Chemistry ; Physics Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reaction of nitrogen atoms with methylacetylene has been studied using a fast-flow low-pressure reactor coupled to a mass spctrometer by a nozzle-beam sampling system. Hydrogen atom concentrations were measured by ESR analysis. Experimental second-order rate constants for the consumption of N atoms, of C3H4, and for the formation of N2 were determined in the temperature range of 283° to 485°K. Product profiles of all stable species and of hydrogen atoms and methyl radicals were obtained for different initial concentrations of the reactants. Two different reaction pathways can be distinguished: one provides for recombination of N atoms, and the second leads to the formation of cyano compounds and other hydrocarbons. Only the latter process is influenced by the addition of hydrogen atoms. Mechanisms for the two pathways are discussed.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/kin.550020603
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    Paper (German National Licenses)
    Fulltext
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