Conversion of dry gel to microporous crystals in gas phase

Masahiko Matsukata, Masaru Ogura, Takayuki Osaki, Poladi Raja Hari Prasad Rao, Mikihiro Nomura, Eiichi Kikuchi

    Research output: Contribution to journalArticle

    223 Citations (Scopus)

    Abstract

    Recently the dry gel conversion (DGC) technique, where a hydrogel is dried and the resultant dry gel is converted into microporous crystals in steam or in a mixed vapor of steam and organic structure-directing agents (SDAs), has been developed. It has been shown that a wide variety of microporous crystals, pure silica microporous crystals, aluminosilicates, metallosilicates, and aluminophosphates, can be synthesized using the DGC method. Remarkable results have been reported in the synthesis of BEA types zeolites, namely aluminosilicate, titaniumsilicate, zincosilicate, and borosilicate with BEA topology, using tetraethylammonium hydroxide, a commercially available SDA. It has also been found that zeolite OU-1, probably analogous to SSZ-31 and NCL-1, is formed via phase transformation from BEA. Dense zeolite coatings like membranes are possible using this method. Characteristics of the DGC method are discussed in detail.

    Original languageEnglish
    Pages (from-to)77-92
    Number of pages16
    JournalTopics in Catalysis
    Volume9
    Issue number1-2
    Publication statusPublished - 1999

    Fingerprint

    Zeolites
    Gels
    Gases
    gels
    vapor phases
    Crystals
    Aluminosilicates
    Steam
    steam
    crystals
    Tetraethylammonium
    Hydrogel
    Hydrogels
    zeolites
    Silicon Dioxide
    hydroxides
    phase transformations
    topology
    Phase transitions
    Vapors

    Keywords

    • Beta zeolite
    • DGC method
    • Dry gel conversion
    • OU-1 zeolite
    • Zeolite synthesis

    ASJC Scopus subject areas

    • Catalysis
    • Chemistry (miscellaneous)
    • Physical and Theoretical Chemistry

    Cite this

    Matsukata, M., Ogura, M., Osaki, T., Hari Prasad Rao, P. R., Nomura, M., & Kikuchi, E. (1999). Conversion of dry gel to microporous crystals in gas phase. Topics in Catalysis, 9(1-2), 77-92.

    Conversion of dry gel to microporous crystals in gas phase. / Matsukata, Masahiko; Ogura, Masaru; Osaki, Takayuki; Hari Prasad Rao, Poladi Raja; Nomura, Mikihiro; Kikuchi, Eiichi.

    In: Topics in Catalysis, Vol. 9, No. 1-2, 1999, p. 77-92.

    Research output: Contribution to journalArticle

    Matsukata, M, Ogura, M, Osaki, T, Hari Prasad Rao, PR, Nomura, M & Kikuchi, E 1999, 'Conversion of dry gel to microporous crystals in gas phase', Topics in Catalysis, vol. 9, no. 1-2, pp. 77-92.
    Matsukata M, Ogura M, Osaki T, Hari Prasad Rao PR, Nomura M, Kikuchi E. Conversion of dry gel to microporous crystals in gas phase. Topics in Catalysis. 1999;9(1-2):77-92.
    Matsukata, Masahiko ; Ogura, Masaru ; Osaki, Takayuki ; Hari Prasad Rao, Poladi Raja ; Nomura, Mikihiro ; Kikuchi, Eiichi. / Conversion of dry gel to microporous crystals in gas phase. In: Topics in Catalysis. 1999 ; Vol. 9, No. 1-2. pp. 77-92.
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