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

研究成果: Article査読

3 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号949
ページ(範囲)1-15
ページ数15
ジャーナルCrystals
10
10
DOI
出版ステータスPublished - 2020 10

ASJC Scopus subject areas

  • 化学工学(全般)
  • 材料科学(全般)
  • 凝縮系物理学
  • 無機化学

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