| 研究課題/領域番号 |
20K15077
|
|---|
| 研究機関 | 九州大学 |
|---|
研究代表者 |
|
|---|
| 研究期間 (年度) |
2020-04-01 – 2022-03-31
|
| キーワード | Metal Organic Framework / cyclodextrin ligands / regenerable CO2 sorbent / Direct Air Capture / Core@shell structure |
|---|
| 研究実績の概要 |
The purpose of this study is to develop a regenerable dual faceted CO2 sorbent from nontoxic metal salts and photosynthetic organic ligands. Researcher has developed metal organic framework (MOF) with a surface area of 1457 m2/g using Cyclodextrin as the organic ligand and K-metal. For this purpose, a vapor diffusion setup developed with precise temperature control which is able to produce >25 g of MOF in four days with perfect crystal structure. The developed MOF are stable upto 130 °C, but highly soluble in water as expected. Further optimization of process to reduce the duration to <1 h and MOF water solubility control is under investigation. It will be done with newly arranged sonic-assisted device.
|
| 現在までの達成度 (区分) |
現在までの達成度 (区分)
3: やや遅れている
理由
Due to the unexpected movement control due to COVID-19, some important parts of vapor diffusion setup and some necessary chemicals were delivered late which resulted in some delay. It was supposed to optimize the PEI coating over high surface area MOF by end of 2020 fiscal year. It is already started and expected speed up the process by rapid crystallization with new device.
Besides, the proposed field visits and research gatherings in top class carbon capture facilities in Japan and abroad are not undertaken due to travel restriction.
|
| 今後の研究の推進方策 |
Time delay with crystal formation is the major issue for a quick progress in this project. It can be overcome in near future by using highly efficient sonic-assisted crystallization. Soon after the optimization of PEI coating over MOF, thermosgravimetric analyzer and CO2 adosrption-desoprtion instruments will be used for CO2 sorption analysis.
The investigation with Sr-metal is facing some difficulty due to very small pore which is not enough to occupy CO2 gas. While continuing research with K-metal, parallel studies will be conducted to tune the pore size of Sr-MOF in accordance to the CO2 fitting size. So that the development of efficient CO2 sorption material is assured by end of fiscal 2021.
|
| 次年度使用額が生じた理由 |
The unexpected travel restrictions due to COVID-19, conferences, and field visits were cancelled in 2020. So that, the budget was not fully consumed.
It is generally agreed that slow crystallization results in proper crystal formation. However, considering the basic evidence, a new methodology is drawn with sonic assistance, which will reduce MOF crystallization to <1 h. The budget will be used for this setup development. Besides, specific modification will be made on N2 adsorption-desorption measurement device in order to study CO2 sorption.
|
