논문 해외 국제전문학술지(SCI급) Sodium-Free Synthesis of Mesoporous Zeolite to Support Pt-Y Alloy Nanoparticles exhibiting High Catalytic Performance in Propane Dehydrogenation
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2021-12
- 저자명 Park, H., Park, H., Kim, J.-C., Choi, M., Park, J. Y., and Ryoo, R.*
- 학술지명 Journal of Catalysis
- 발행처명 Elsevier
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 6
- 원문 링크 https://www.sciencedirect.com/science/article/abs/pii/S0021951721003730
홈페이지논문 초록 (Abstract)
Mesoporous zeolite-supported Pt3Y catalyst deactivates slowly in propane dehydrogenation, maintaining high propane conversion and propylene selectivity, but the formation of the intermetallic compound requires atomistic migration of yttrium through silanol nests on the zeolite. Compared to the cumbersome generation of silanols via framework demetallation, we report a direct synthesis of mesoporous MFI zeolite possessing silanol nests. The synthesis procedure employed a diammonium-type bromide surfactant [C18H37single bondN(CH3)2single bondC6H12single bondN(CH3)2single bondC4H9Br2] and a sodium-free silica source. The basicity of the synthesis mixture was adjusted by the addition of readily available N(CH3)4OH, instead of converting the surfactant to hydroxyl form. The presence of silanol nests in the resultant zeolite was confirmed by IR and NMR spectroscopies. When the zeolite was supported with 0.50 wt% Pt and 0.50 wt% Y using nitrate precursors, a remarkably long catalytic lifetime of 20 days was obtained with high propane conversion and propylene selectivity under the reaction condition using neat propane gas at 853 K.