Formation process of columnar grown (101)-oriented silicalite-1 membrane and its separation property for xylene isomer

Motomu Sakai; Takuya Kaneko; Yukichi Sasaki; Miyuki Sekigawa; Masahiko Matsukata

doi:10.3390/cryst10100949

Formation process of columnar grown (101)-oriented silicalite-1 membrane and its separation property for xylene isomer

Motomu Sakai^*, Takuya Kaneko, Yukichi Sasaki, Miyuki Sekigawa, Masahiko Matsukata

^*Corresponding author for this work

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

8 Citations (Scopus)

Abstract

Silicalite-1 membrane was prepared on an outer surface of a tubular α-alumina support by a secondary growth method. Changes of defect amount and crystallinity during secondary growth were carefully observed. The defect-less well-crystallized silicalite-1 membrane was obtained after 7-days crystallization at 373 K. The silicalite-1 membrane became (h0l)-orientation with increasing membrane thickness, possibly because the orientation was attributable to “evolutionally selection”. The (h0l)-oriented silicalite-1 membrane showed high p-xylene separation performance for a xylene isomer mixture (o-/m-/p-xylene = 0.4/0.4/0.4 kPa). The p-xylene permeance through the membrane was 6.52 × 10⁻⁸ mol m⁻² s⁻¹ Pa⁻¹ with separation factors α_p/o, α_p/m of more than 100 at 373 K. As a result of microscopic analysis, it was suggested that a very thin part in the vicinity of surface played as effective separation layer and could contribute to high permeation performance.

Original language	English
Article number	949
Pages (from-to)	1-15
Number of pages	15
Journal	Crystals
Volume	10
Issue number	10
DOIs	https://doi.org/10.3390/cryst10100949
Publication status	Published - 2020 Oct

Keywords

Evolutionally selection
Membrane
Orientation
Separation
Silicalite-1
Xylene
Zeolite

ASJC Scopus subject areas

Chemical Engineering(all)
Materials Science(all)
Condensed Matter Physics
Inorganic Chemistry

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10.3390/cryst10100949

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title = "Formation process of columnar grown (101)-oriented silicalite-1 membrane and its separation property for xylene isomer",

abstract = "Silicalite-1 membrane was prepared on an outer surface of a tubular α-alumina support by a secondary growth method. Changes of defect amount and crystallinity during secondary growth were carefully observed. The defect-less well-crystallized silicalite-1 membrane was obtained after 7-days crystallization at 373 K. The silicalite-1 membrane became (h0l)-orientation with increasing membrane thickness, possibly because the orientation was attributable to “evolutionally selection”. The (h0l)-oriented silicalite-1 membrane showed high p-xylene separation performance for a xylene isomer mixture (o-/m-/p-xylene = 0.4/0.4/0.4 kPa). The p-xylene permeance through the membrane was 6.52 × 10−8 mol m−2 s−1 Pa−1 with separation factors αp/o, αp/m of more than 100 at 373 K. As a result of microscopic analysis, it was suggested that a very thin part in the vicinity of surface played as effective separation layer and could contribute to high permeation performance.",

keywords = "Evolutionally selection, Membrane, Orientation, Separation, Silicalite-1, Xylene, Zeolite",

author = "Motomu Sakai and Takuya Kaneko and Yukichi Sasaki and Miyuki Sekigawa and Masahiko Matsukata",

note = "Funding Information: Funding: This research was partially supported by JST-CREST (Japan Science and Technology Agency, Create REvolutionary technological seeds for Science and Technology innovation program), Grant Number JPMJCR1324, Japan. Funding Information: This research was partially supported by JST-CREST (Japan Science and Technology Agency, Create REvolutionary technological seeds for Science and Technology innovation program), Grant Number JPMJCR1324, Japan. Publisher Copyright: {\textcopyright} 2020 by the authors. Licensee MDPI, Basel, Switzerland.",

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AU - Sakai, Motomu

AU - Kaneko, Takuya

AU - Sasaki, Yukichi

AU - Sekigawa, Miyuki

AU - Matsukata, Masahiko

N1 - Funding Information: Funding: This research was partially supported by JST-CREST (Japan Science and Technology Agency, Create REvolutionary technological seeds for Science and Technology innovation program), Grant Number JPMJCR1324, Japan. Funding Information: This research was partially supported by JST-CREST (Japan Science and Technology Agency, Create REvolutionary technological seeds for Science and Technology innovation program), Grant Number JPMJCR1324, Japan. Publisher Copyright: © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2020/10

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N2 - Silicalite-1 membrane was prepared on an outer surface of a tubular α-alumina support by a secondary growth method. Changes of defect amount and crystallinity during secondary growth were carefully observed. The defect-less well-crystallized silicalite-1 membrane was obtained after 7-days crystallization at 373 K. The silicalite-1 membrane became (h0l)-orientation with increasing membrane thickness, possibly because the orientation was attributable to “evolutionally selection”. The (h0l)-oriented silicalite-1 membrane showed high p-xylene separation performance for a xylene isomer mixture (o-/m-/p-xylene = 0.4/0.4/0.4 kPa). The p-xylene permeance through the membrane was 6.52 × 10−8 mol m−2 s−1 Pa−1 with separation factors αp/o, αp/m of more than 100 at 373 K. As a result of microscopic analysis, it was suggested that a very thin part in the vicinity of surface played as effective separation layer and could contribute to high permeation performance.

AB - Silicalite-1 membrane was prepared on an outer surface of a tubular α-alumina support by a secondary growth method. Changes of defect amount and crystallinity during secondary growth were carefully observed. The defect-less well-crystallized silicalite-1 membrane was obtained after 7-days crystallization at 373 K. The silicalite-1 membrane became (h0l)-orientation with increasing membrane thickness, possibly because the orientation was attributable to “evolutionally selection”. The (h0l)-oriented silicalite-1 membrane showed high p-xylene separation performance for a xylene isomer mixture (o-/m-/p-xylene = 0.4/0.4/0.4 kPa). The p-xylene permeance through the membrane was 6.52 × 10−8 mol m−2 s−1 Pa−1 with separation factors αp/o, αp/m of more than 100 at 373 K. As a result of microscopic analysis, it was suggested that a very thin part in the vicinity of surface played as effective separation layer and could contribute to high permeation performance.

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KW - Orientation

KW - Separation

KW - Silicalite-1

KW - Xylene

KW - Zeolite

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Formation process of columnar grown (101)-oriented silicalite-1 membrane and its separation property for xylene isomer

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