Preparation of zeolite nano-film by precise control of crystallization process assisted by microwave rapid heating

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420776
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Reaction engineering/Process system
• Research Institution: Yamagata University
• Principal Investigator: Higuchi Takeshi 山形大学, 大学院理工学研究科, 助教 (40312756)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 合成ゼオライト / マイクロ波加熱 / 分離膜

Outline of Final Research Achievements

The process of zeolite formation by microwave heating was analyzed by transmission and scanning electron microscope, dynamic light scattering, nuclear magnetic resonance, X-ray diffraction, small angle X-ray scattering. Several pieces of fundamental knowledge were successfully obtained as follows.
(1) Trace amount of crystal nuclei are present in hydrolysed solution of alkoxide, but most of them are chain polymer of about 16 nm in length. (2) The polymerization structure densifies by 300 W microwave heating up to around 90 min, LTA type zeolite starts to be formed from around 200 min, and by 400 min, grows to particles of about 200 nm. (3) The crystallinity is increased by 12 h of heating and the polymerization is completed. (4) The crystallinity becomes maximum at around 24 h of heating, and dissolution / reprecipitation becomes dominant after that.

Free Research Field

材料プロセス工学