2:45 PM - 3:00 PM

[1B14] Development of a novel route for TUN-type zeolite synthsis and its catalytic properties

○Yao Lu¹, Feiyu Qin¹, Yong Wang¹, Junko Nomura Kondo¹, Toshiyuki Yokoi¹ (1. Tokyo Institute of Technology)

3次元中細孔構造のあるTUN型ゼオライトはZSM-5 (MFI)と構造が似ているため、様々な応用が期待されている。既報により、TUN型ゼオライトは水熱合成中MWW型層状中間相を経て、得られた。アモルファス前駆体の代わりにゼオライト合成の出発物質とする研究が多くあり、異なる活性を示すゼオライトを得ることが可能である。本研究では、MWW型ゼオライトを原料としたTUN型ゼオライトの合成を試み、それらの固体酸触媒として特性を検討した。

3:00 PM - 3:15 PM

[1B15] Methane oxidative conversion to lower olefin via methanol over metal-containing zeolite catalyst

○Kengo Nakamura¹, Shuhei Yasuda¹, Takeshi Matsumoto¹, Junko Nomura Kondo¹, Mizuho Yabushita², Ryota Osuga², Atsushi Muramatsu², Toshiyuki Yokoi¹ (1. Tokyo Tech, 2. Tohoku University)

メタンの部分酸化によるメタノール生成反応、通称MTM反応に用いる触媒の開発は広く研究されている。しかし生成物であるメタノールは容易に過酸化されてしまうため、高い生成量が見込めないことが課題となっている。この課題の解決のため、ゼオライト触媒上でのMTO反応機構に着目し、生成されたメタノールが過酸化される前に低級オレフィンへと変換する反応機構を提案する。本発表ではゼオライト骨格内Al分布を制御した金属イオン交換CHA型ゼオライトを触媒として用いた際に、MTO反応が進行し低級オレフィンの生成が確認できたことなどについて報告する。

3:15 PM - 3:30 PM

[1B16] Synthesis of Ti₂O₃ from TiO₂ with different particle size and morphology

○Asako Iwamoro¹, Masanori Nagao¹, Ryoichi Otomo², Yuichi Kamiya² (1. Graduate School of Environmental Science, Hokkaido University, 2. Faculty of Environmental Earth Science, Hokkaido University)

Ti₂O₃ is a kind of suboxides that contains trivalent titanium in its crystal structure. We have established a method for the synthesis of suboxides from rutile TiO₂ using TiH₂ as a reducing agent. This method enables us to synthesize various kinds of hypervalent titanium oxides such as Ti₂O₃, Ti₃O₅ and Ti₄O₇ while retaining the particle morphology of TiO₂. In this study, Ti₂O₃ was synthesized from various TiO₂ precursors with different crystal structures and particle size states.

3:30 PM - 3:45 PM

[1B17] Development of highly loading amine-immobilized silica for solid CO₂ sorbent

○Miori Kataoka¹, Soichi Kikkawa^1,2, Seiji Yamazoe^1,2,3 (1. Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 2. Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, 3. Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST))

アミン水溶液を用いた化学吸収法はCO₂の分離・回収技術における有効な手法の一つであるが、近年、回収・再生がより容易なCO₂吸収剤として固体表面にアミンを修飾した固体CO₂吸収剤が注目されている。本研究では、従来よりアミン効率の高い固体CO₂吸収剤の開発を志向し、高密度なクロロプロピル基を有するシリカを合成し、アミンのアミノ基をアルキル化することで高密度アミン修飾シリカの合成を検討した。

3:45 PM - 4:00 PM

[1B18] QM/MM ONIOM calculations for Methane to Ethylene Conversion inside Coinage-Metal Containig ZSM-5 zeolites

○Keigo OISHI¹, Takashi YUMURA¹ (1. Kyoto Institute of Technology)

We employed QM/MM ONIOM calculations where density functional theory (DFT) calculations were used in QM for the purpose of clarifying the mechanism of the methane to ethylene conversion inside coinage-metal containing ZSM-5 zeolites as well as looking at their potential energy surface by obtaining their local minimum and transition states. According to ONIOM calculations, reactions of two methanes with coinage-metal containing ZSM-5 zeolites form ethylene via ethane. Furthermore, we found a rate-determining step for the conversion by each coinage-metal containing ZSM-5 and compared their activation energies. The comparative analysis indicated that Cu−ZSM-5 is the most efficient catalyst for the methane to ethylene conversion among the considered zeolites.

Session information

[1B14-18] Functional materials(2)

[1B14] Development of a novel route for TUN-type zeolite synthsis and its catalytic properties

[1B15] Methane oxidative conversion to lower olefin via methanol over metal-containing zeolite catalyst

[1B16] Synthesis of Ti₂O₃ from TiO₂ with different particle size and morphology

[1B17] Development of highly loading amine-immobilized silica for solid CO₂ sorbent

[1B18] QM/MM ONIOM calculations for Methane to Ethylene Conversion inside Coinage-Metal Containig ZSM-5 zeolites

Authentication

Session information

[1B14-18] Functional materials(2)

[1B14] Development of a novel route for TUN-type zeolite synthsis and its catalytic properties

[1B15] Methane oxidative conversion to lower olefin via methanol over metal-containing zeolite catalyst

[1B16] Synthesis of Ti2O3 from TiO2 with different particle size and morphology

[1B17] Development of highly loading amine-immobilized silica for solid CO2 sorbent

[1B18] QM/MM ONIOM calculations for Methane to Ethylene Conversion inside Coinage-Metal Containig ZSM-5 zeolites

Authentication

[1B16] Synthesis of Ti₂O₃ from TiO₂ with different particle size and morphology

[1B17] Development of highly loading amine-immobilized silica for solid CO₂ sorbent