HCN and N2 formation mechanism during NO/char reaction

Hironori Orikasa, Koichi Matsuoka, Takashi Kyotani, Akira Tomita

    Research output: Contribution to journalConference articlepeer-review

    18 Citations (Scopus)

    Abstract

    The reaction of phenol/formaldehyde resin char with NO was carried out in the temperature range from 850 to 1100 °C. Nitrogen-containing species formed during the reaction were carefully examined by a high-speed gas chromatograph and a mass spectrometer. Large amounts of N2 and CO and small amounts of CO2 and N2O were formed by the NO/char reaction. In addition to these products, a significant amount of HCN was observed in the high-temperature region. The mechanism of HCN formation behavior was examined by step response experiments. It was found that HCN was formed through nitrogen-containing surface species on char, C(N), and its formation rate was greatly affected by the amount of available hydrogen. The N2 formation was also affected by the amount of available hydrogen in the following manner. N2 was formed mainly by the reaction of C(N) with gaseous NO. However, a part of C(N) was consumed through the conversion to HCN if sufficient hydrogen was present in the vicinity of C(N). When the HCN formation took place, the amount of C(N) decreased, leading to less N2 formation. Thus, it is suggested that even in the char-related reaction, hydrogen content is an important factor for the fate of nitrogen.

    Original languageEnglish
    Pages (from-to)2283-2289
    Number of pages7
    JournalProceedings of the Combustion Institute
    Volume29
    Issue number2
    DOIs
    Publication statusPublished - 2002 Jan 1
    Event30th International Symposium on Combustion - Chicago, IL, United States
    Duration: 2004 Jul 252004 Jul 30

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Mechanical Engineering
    • Physical and Theoretical Chemistry

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