Adsorption and catalytic reaction of CFC-11 on NaX zeolite

Mana Yasui Hiraiwa, Atsushi Yamazaki, Toshio Nagoya

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    NaX zeolite is used to collect and decompose chlorofluorocarbons (CFCs) and to determine the behavior of CFC-11 molecules in zeolitic pores using various methods. At room temperature, CFC-11 molecules are adsorbed on the micropores of NaX zeolite, and at 400°C CFC-11 molecules were decomposed by the catalytic reaction of NaX zeolite. Approximately 30 CFC-11 molecules are adsorbed and 90 CFC-11 molecules are decomposed per unit cell of NaX zeolite. HCl and HF gases are detected in the outlet gas of the decomposed CFC-11. The results indicate that Al-O bonds in the zeolite crystal structure are destroyed. The destruction of the zeolite crystal structure tends to occur on the selective planes along the hhh, hh0 and 3hhh directions.

    Original languageEnglish
    Pages (from-to)264-267
    Number of pages4
    JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
    Volume104
    Issue number4
    Publication statusPublished - 1996

    Fingerprint

    Chlorofluorocarbons
    Zeolites
    chlorofluorocarbons
    Adsorption
    adsorption
    Molecules
    molecules
    Crystal structure
    Gases
    crystal structure
    outlets
    gases
    destruction
    porosity
    room temperature
    cells

    Keywords

    • Adsorption
    • Chlorofluorocarbons (CFCs)
    • Decomposition
    • NaX zeolite

    ASJC Scopus subject areas

    • Ceramics and Composites

    Cite this

    Adsorption and catalytic reaction of CFC-11 on NaX zeolite. / Hiraiwa, Mana Yasui; Yamazaki, Atsushi; Nagoya, Toshio.

    In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 104, No. 4, 1996, p. 264-267.

    Research output: Contribution to journalArticle

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    AU - Hiraiwa, Mana Yasui

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    AU - Nagoya, Toshio

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    AB - NaX zeolite is used to collect and decompose chlorofluorocarbons (CFCs) and to determine the behavior of CFC-11 molecules in zeolitic pores using various methods. At room temperature, CFC-11 molecules are adsorbed on the micropores of NaX zeolite, and at 400°C CFC-11 molecules were decomposed by the catalytic reaction of NaX zeolite. Approximately 30 CFC-11 molecules are adsorbed and 90 CFC-11 molecules are decomposed per unit cell of NaX zeolite. HCl and HF gases are detected in the outlet gas of the decomposed CFC-11. The results indicate that Al-O bonds in the zeolite crystal structure are destroyed. The destruction of the zeolite crystal structure tends to occur on the selective planes along the hhh, hh0 and 3hhh directions.

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