| Project/Area Number |
18K14052
|
|---|
| Research Category |
Grant-in-Aid for Early-Career Scientists
|
| Allocation Type | Multi-year Fund |
|---|
| Review Section |
Basic Section 27030:Catalyst and resource chemical process-related
|
|---|
| Research Institution | Hokkaido University |
|---|
Principal Investigator |
Otomo Ryoichi 北海道大学, 地球環境科学研究院, 准教授 (10776462)
|
|---|
| Project Period (FY) |
2018-04-01 – 2021-03-31
|
| Project Status |
Completed (Fiscal Year 2020)
|
| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
|
|---|
| Keywords | ゼオライト / フッ素 / ハフニウム / 移動水素化 |
|---|
| Outline of Final Research Achievements |
In this study, a novel method for post-synthesis of Hf-Beta was developed. Dealuminated zeolite Beta was impregnated with hafnium chloride with ammonium fluoride together, and then calcined at a high temperature to produce zeolite Hf-Beta. The resulting materials showed extremely high activity for the transfer hydrogenation reaction of ketones. Making use of various characterization techniques as well as quantum chemical calculation, the mechanism for the formation of highly active Hf sites was estimated. It was presumed that during impregnation or calcination at low temperature, Hf-F complex species were generated and decomposed by high temperature calcination to form highly active Hf sites in the zeolite framework.
|
| Academic Significance and Societal Importance of the Research Achievements |
ヘテロ金属を含むゼオライトを合成する際には，金属源由来のアニオンが共存することがほとんどであるが，共存アニオンが金属種の状態に及ぼす影響は未解明であり，共存アニオンを積極的に利用した合成法はこれまでにほとんどなかった．本研究では，添加フッ素がゼオライト骨格内Hf原子サイトの形成を促進し，活性点が増加するため高活性なHf-Betaが得られることを見出した．これまでに類似の共存アニオンの効果は報告されておらず，メタロシリケートゼオライトの合成に関するまったく新規な知見が得られただけでなく，これまでのフッ素を用いた合成において見過ごされてきた共存フッ素の効果について見直す転機となる可能性もある．
|
