2021 Fiscal Year Final Research Report
Continuously Making of TBAB Hydrate by Using a Metallic Foil Belt
| Project/Area Number |
19K04213
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 19020:Thermal engineering-related
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| Research Institution | Kanazawa University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 結晶成長 / 水和物 / 凝固 |
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| Outline of Final Research Achievements |
This study conducted an experiment to make plate-like TBAB hydrate using a metal foil belt and discussed growth of TBAB hydrate crystal. Wherein an aqueous solution concentration is 40w%, only type A hydrate appears. From the observation of the process, at a velocity of 1 mm / min or less, crystal growth is dominant. In contrast at higher speeds, continuous formation is possible by nucleation-dominated solidification. In the case of 10w%, a plate-like solid phase mainly containing type B could be continuously obtained, but the existence of type A was also confirmed. It was concluded that this is because growth rate of type B crystal is extremely low, and ice crystals that cause an increase in the concentration of the aqueous solution are unavoidable at a certain velocity.
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| Free Research Field |
熱工学
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| Academic Significance and Societal Importance of the Research Achievements |
これまで知見の少ないTBABハイドレートの高過冷度域において，二種類の異なる結晶構造の結晶挙動を明らかにした．また，従来法と大きく異なる，安定かつ高速，固液分離が容易などの特徴を持つ新たな生成方法を提案した．これらの成果は，現在，検討されている蓄熱やガス分離等への展開において，限界生成速度などのシステム設計の指針，スラリー搬送の閉塞や冷却面での固着などの解明，結晶選択的生成技術の確立など様々な観点から貢献することが期待される．
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