Aggregate Structure Control in Spray Drying Process of Soft Porous Crystals

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K15344
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 27010:Transport phenomena and unit operations-related
• Research Institution: Osaka Prefecture University
• Principal Investigator: Ohsaki Shuji 大阪府立大学, 工学(系)研究科(研究院), 助教 (40802426)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: Metal-organic framework / ソフト多孔性結晶 / 攪拌造粒 / 流動層造粒 / 噴霧乾燥法 / 凝集体構造制御 / ゲート吸着 / 数値流体計算

Outline of Final Research Achievements

Soft porous crystals (SPCs) are expected to have various applications because of their unique adsorption behavior (gated adsorption), in which the adsorbed amount increases stepwise caused by structural transition (volume expansion). However, the synthesized SPCs have poor handling properties due to their fine particle size. This study attempted to solve this problem by using various granulation methods to form agglomerates suitable for the volume-changing properties of SPC. Through both experimental investigation and numerical analysis, the mechanism of SPC agglomerate formation and design SPCs with excellent handling performance while maintaining their unique adsorption behavior were investigated.

Free Research Field

化学工学・粉体工学

Academic Significance and Societal Importance of the Research Achievements

従来のSPCに関する研究は，「構造柔軟性を示す材料の探索」が先導してきた。その結果，多種多様なSPCが発見されてきたものの，ハンドリング性能の向上など実用化に必要なプロセス開発はほとんど行われていない。本研究は，このプロセス構築に焦点を当てた取り組みであり，得られる結果はSPCの実用化を先導するもので，社会的波及効果も期待される。また，ブラックボックスと見なされがちである凝集体形成メカニズムに焦点を当て，それを理論解析・体系化することは粉体工学の発展にも繋がる。