Synthesis and Characterization of A Stable Extra-Large-Pore Zeolite with 15×12×12 Member-Ring Channels

Xianshu Cai; Yue Zhao; Wenwen Zi; Feng Jiao; Hongbin Du

doi:10.1002/chem.202200934

Synthesis and Characterization of A Stable Extra-Large-Pore Zeolite with 15×12×12 Member-Ring Channels

Chemistry. 2022 Aug 10;28(45):e202200934. doi: 10.1002/chem.202200934. Epub 2022 Jun 30.

Authors

Xianshu Cai¹, Yue Zhao¹, Wenwen Zi², Feng Jiao¹, Hongbin Du¹

Affiliations

¹ State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China.
² College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, P. R. China.

PMID: 35666648
DOI: 10.1002/chem.202200934

Abstract

Extra-large-pore zeolites have great application potential in various industrial fields, such as oil refinery, fine chemicals and biomass processing. Herein, we report the synthesis of an extra-large-pore germanosilicate zeolite (named NUD-13) by using an easily obtained aromatic organic cation 1,2-dimethyl-3-propyl-benzimidazolium as organic structure-directing agents. NUD-13 possesses a rare 15-member ring extra-large-pore channel intersecting with two elliptical 12-member ring channels, which is isostructural to germanosilicate zeolite GeZA synthesized by using triphenylsulfonium. The germanium in NUD-13 can be partially substituted by acid treatment to obtain stable high silica zeolite. In addition, aluminium is added into the framework of NUD-13 during the post-synthesis treatment process, which provides a foundation for catalytic application.

Keywords: degermanation; extra-large-pore; synthesis; zeolite.

Abstract

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