Organic Structure-Directing Agent-Free Synthesis of Mordenite-Type Zeolites Driven by Al-Rich Amorphous Aluminosilicates

Ting Xiao, Mizuho Yabushita, Toshiki Nishitoba, Ryota Osuga, Motohiro Yoshida, Masaki Matsubara, Sachiko Maki, Kiyoshi Kanie, Toshiyuki Yokoi, Wenbin Cao, Atsushi Muramatsu

研究成果: Article査読

抄録

Mordenite (MOR)-type zeolites with a Si/Al molar ratio of up to 13 with crystallite sizes of ca. 60 nm were successfully synthesized from Al-rich aluminosilicates with a Si/Al ratio of 2 and additional SiO2 under seed-assisted hydrothermal conditions for 6 h or longer without any organic structure-directing agents (OSDAs). In stark contrast, under the same hydrothermal conditions for 6 h, control experiments using starting reagent(s), such as Al-poor aluminosilicate, pure SiO2, tetraethyl orthosilicate, and Al(NO3)3, all of which are typically employed for zeolite synthesis, failed to yield MOR-type zeolites. The penta-coordinated Al species, which are present in Al-rich aluminosilicates and are more reactive than the tetra- and hexa-coordinated Al species typically found in alumina and Al-poor aluminosilicates, played a decisive role in the OSDA-free synthesis of MOR-type zeolites.

本文言語English
ページ(範囲)5176-5182
ページ数7
ジャーナルACS Omega
6
8
DOI
出版ステータスPublished - 2021 3 2

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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