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

225 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
Externally publishedYes

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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