2020年2月
Extremely Stable Zeolites Developed via Designed Liquid-Mediated Treatment
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- 巻
- 142
- 号
- 8
- 開始ページ
- 3931
- 終了ページ
- 3938
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/jacs.9b12709
- 出版者・発行元
- AMER CHEMICAL SOC
Improving the stability of porous materials for practical applications is highly challenging. Aluminosilicate zeolites are utilized for adsorptive and catalytic applications, wherein they are sometimes exposed to high-temperature steaming conditions (similar to 1000 degrees C). As the degradation of high -silica zeolites originates from the defect sites in their frameworks, feasible defect-healing methods are highly demanded. Herein, we propose a method for healing defects to create extremely stable high-silica zeolites. High -silica (SiO2/Al2O3 > 240) zeolites with *BEA-, MFI-, and MOR-type topologies could be stabilized by significantly reducing the number of defect sites via a liquid-mediated treatment without using additional silylating agents. Upon exposure to extremely high temperature (900-1150 degrees C) steam, the stabilized zeolites retain their crystallinity and micropore volume, whereas the parent commercial zeolites degrade completely. The proposed self-defect-healing method provides new insights into the migration of species through porous bodies and significantly advances the practical applicability of zeolites in severe environments.
- リンク情報
- ID情報
-
- DOI : 10.1021/jacs.9b12709
- ISSN : 0002-7863
- eISSN : 1520-5126
- Web of Science ID : WOS:000517360400031