A Dynamic Angle Spinning NMR Probe for 27 A1 NMR Characterization of Silica-Alumina Catalysts

用于二氧化硅-氧化铝催化剂 27 A1 NMR 表征的动态角旋转 NMR 探针

• 批准号: 9111885
• 负责人: Gary Haller
• 金额: $ 1.32万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-01 至 1992-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9111885&HistoricalAwards=false
• 关键词: Dynamic; Angle; Spinning; NMR; Probe

A dynamic-angle spinning probe for solid-state nuclear magnetic resonance is acquired tosupport research in engineering. The initial use of the probe will be the characterization of amorphous silia-alumina acid catalysts. Model catalysts with the acid function restricted to the surface are prepared and the density and strength of acid sites aremeasured by a conbination of base adosrption andacid- catalyzed reactions. The activity of tehsilica-aluminas is correlated with the structure determined by dunamic-angle aluninum-27 nuclear magnetic resonance. Acid catalysts are widely used industrially. Because of their low cost, applications can be expected to increase in fuels refinement, chemicals production, and environmental control. However, a better understanding of their behavior is necessary to design control systems for optimum conversions.

一种用于固体核探测的动态角旋转探针 磁共振被收购，以支持研究， 工程. 探测器的初始使用将是 无定形二氧化硅-氧化铝酸催化剂的表征。 酸功能限制在 表面制备和酸的密度和强度 位点通过碱吸附和酸吸附的结合来测量， 催化反应。 硅酸铝的活性是 与杜纳米角决定的结构相关 铝-27核磁共振。 酸催化剂在工业上被广泛使用。 因为他们的 成本低，应用可以预期增加燃料 精炼、化学品生产和环境控制。 然而，更好地了解他们的行为是必要的 设计最佳转换的控制系统。