Pyrolysis of hydrocarbons as vacuum carburizing media

Ken Ohashi, Nilson Kunioshi

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    In order to test the propensity to form soot in the vacuum carburizing method, the pyrolysis of acetylene, methane, propane, and cyclohexane as vacuum carburizing media was studied at typical operating conditions of vacuum carburizing. Under the test conditions, methane is the most stable media and propane and cyclohexane are the easiest to decompose. The propensity to form soot in the vacuum carburizing furnace varies, then, according to the media. The pyrolysis of the hydrocarbons was also calculated by means of a reaction kinetics model with a software package for combustion analysis. This model includes Polycyclic Aromatic Hydrocarbons (PAH) which are known as precursors to soot formation and growth. The calculated variation of the concentration of the pyrolyzed hydrocarbons with time agreed qualitatively with the experimental results.

    Original languageEnglish
    Title of host publicationProceedings of the 17th IFHTSE Congress
    PublisherThe Japan Society for Heat Treatment (JSHT)
    Pages121-124
    Number of pages4
    Volume1
    ISBN (Print)9780000000002
    Publication statusPublished - 2009
    Event17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008 - Kobe, Japan
    Duration: 2008 Oct 262008 Oct 28

    Other

    Other17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008
    CountryJapan
    CityKobe
    Period08/10/2608/10/28

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    Keywords

    • Hydrocarbon
    • Low pressure carburizing
    • Pyrolysis
    • Sooting
    • Vacuum carburizing

    ASJC Scopus subject areas

    • Surfaces, Coatings and Films
    • Condensed Matter Physics
    • Mechanics of Materials

    Cite this

    Ohashi, K., & Kunioshi, N. (2009). Pyrolysis of hydrocarbons as vacuum carburizing media. In Proceedings of the 17th IFHTSE Congress (Vol. 1, pp. 121-124). The Japan Society for Heat Treatment (JSHT).