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

*この研究の対応する著者

研究成果: Article査読

239 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)77-92
ページ数16
ジャーナルTopics in Catalysis
9
1-2
出版ステータスPublished - 1999 12 1

ASJC Scopus subject areas

  • 触媒
  • 化学 (全般)

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