Synthesis of high-silica CHA type zeolite by interzeolite conversion of FAU type zeolite in the presence of seed crystals

Masaya Itakura; Ikuhiro Goto; Atsushi Takahashi; Tadahiro Fujitani; Yusuke Ide; Masahiro Sadakane; Tsuneji Sano

doi:10.1016/j.micromeso.2011.03.041

Synthesis of high-silica CHA type zeolite by interzeolite conversion of FAU type zeolite in the presence of seed crystals

Masaya Itakura, Ikuhiro Goto, Atsushi Takahashi, Tadahiro Fujitani, Yusuke Ide, Masahiro Sadakane, Tsuneji Sano

Research output: Contribution to journal › Article › peer-review

86 Citations (Scopus)

Abstract

The influence of seed crystals on the interzeolite conversion of FAU type zeolite into CHA type zeolite was investigated in the presence of benzyltrimethylammonium hydroxide as a structure-directing agent under various hydrothermal synthesis conditions. Pure and highly crystalline CHA type zeolites with a wide range of Si/Al ratios were obtained in a shorter crystallization time as compared with those obtained without seed crystals. Furthermore, we achieved the first successful synthesis of high-silica CHA type zeolite in the absence of Na⁺ cations by increasing the seed content. The protonated CHA type zeolite with a Si/Al ratio of ca. 15 yielded the highest propylene yield of ca. 48 C-% in ethanol conversion into light olefins.

Original language	English
Pages (from-to)	91-96
Number of pages	6
Journal	Microporous and Mesoporous Materials
Volume	144
Issue number	1-3
DOIs	https://doi.org/10.1016/j.micromeso.2011.03.041
Publication status	Published - 2011 Oct
Externally published	Yes

Keywords

CHA type zeolite
Ethanol conversion
FAU type zeolite
Interzeolite conversion
Seed crystal

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanics of Materials

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10.1016/j.micromeso.2011.03.041

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Synthesis of high-silica CHA type zeolite by interzeolite conversion of FAU type zeolite in the presence of seed crystals. / Itakura, Masaya; Goto, Ikuhiro; Takahashi, Atsushi; Fujitani, Tadahiro; Ide, Yusuke; Sadakane, Masahiro; Sano, Tsuneji.

In: Microporous and Mesoporous Materials, Vol. 144, No. 1-3, 10.2011, p. 91-96.

Research output: Contribution to journal › Article › peer-review

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title = "Synthesis of high-silica CHA type zeolite by interzeolite conversion of FAU type zeolite in the presence of seed crystals",

abstract = "The influence of seed crystals on the interzeolite conversion of FAU type zeolite into CHA type zeolite was investigated in the presence of benzyltrimethylammonium hydroxide as a structure-directing agent under various hydrothermal synthesis conditions. Pure and highly crystalline CHA type zeolites with a wide range of Si/Al ratios were obtained in a shorter crystallization time as compared with those obtained without seed crystals. Furthermore, we achieved the first successful synthesis of high-silica CHA type zeolite in the absence of Na+ cations by increasing the seed content. The protonated CHA type zeolite with a Si/Al ratio of ca. 15 yielded the highest propylene yield of ca. 48 C-% in ethanol conversion into light olefins.",

keywords = "CHA type zeolite, Ethanol conversion, FAU type zeolite, Interzeolite conversion, Seed crystal",

author = "Masaya Itakura and Ikuhiro Goto and Atsushi Takahashi and Tadahiro Fujitani and Yusuke Ide and Masahiro Sadakane and Tsuneji Sano",

note = "Funding Information: This work was supported by a New Energy and Industrial Technology Development Organization (NEDO) grant.",

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doi = "10.1016/j.micromeso.2011.03.041",

language = "English",

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AU - Itakura, Masaya

AU - Goto, Ikuhiro

AU - Takahashi, Atsushi

AU - Fujitani, Tadahiro

AU - Ide, Yusuke

AU - Sadakane, Masahiro

AU - Sano, Tsuneji

N1 - Funding Information: This work was supported by a New Energy and Industrial Technology Development Organization (NEDO) grant.

PY - 2011/10

Y1 - 2011/10

N2 - The influence of seed crystals on the interzeolite conversion of FAU type zeolite into CHA type zeolite was investigated in the presence of benzyltrimethylammonium hydroxide as a structure-directing agent under various hydrothermal synthesis conditions. Pure and highly crystalline CHA type zeolites with a wide range of Si/Al ratios were obtained in a shorter crystallization time as compared with those obtained without seed crystals. Furthermore, we achieved the first successful synthesis of high-silica CHA type zeolite in the absence of Na+ cations by increasing the seed content. The protonated CHA type zeolite with a Si/Al ratio of ca. 15 yielded the highest propylene yield of ca. 48 C-% in ethanol conversion into light olefins.

AB - The influence of seed crystals on the interzeolite conversion of FAU type zeolite into CHA type zeolite was investigated in the presence of benzyltrimethylammonium hydroxide as a structure-directing agent under various hydrothermal synthesis conditions. Pure and highly crystalline CHA type zeolites with a wide range of Si/Al ratios were obtained in a shorter crystallization time as compared with those obtained without seed crystals. Furthermore, we achieved the first successful synthesis of high-silica CHA type zeolite in the absence of Na+ cations by increasing the seed content. The protonated CHA type zeolite with a Si/Al ratio of ca. 15 yielded the highest propylene yield of ca. 48 C-% in ethanol conversion into light olefins.

KW - CHA type zeolite

KW - Ethanol conversion

KW - FAU type zeolite

KW - Interzeolite conversion

KW - Seed crystal

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ER -

Synthesis of high-silica CHA type zeolite by interzeolite conversion of FAU type zeolite in the presence of seed crystals

Abstract

Keywords

ASJC Scopus subject areas

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