Metal-Support Effects in Platinum/Zeolite-L Catalysts

铂/沸石-L 催化剂中的金属负载效应

• 批准号: 8912734
• 负责人: Gary Haller
• 金额: $ 21.24万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-09-01 至 1992-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8912734&HistoricalAwards=false
• 关键词: Metal; Support; Effects; Platinum; Zeolite

This is an investigation of metal-support interactions in platinum/zeolite-L using a combination of physical and chemical probes. Attempts are made to characterize the interactions between platinum particles and zeolite-L using X- ray absorption (both near-edge (XANES) and fine-structure (EXAFS) spectroscopies) and nuclear magnetic resonance of hydrogen-1 and carbon-13. Results of these studies are correlated with catalytic activity and chemisorption involving hydrogen, oxygen, carbon monoxide, benzene, and toluene. Test reactions used include the isomerization and hydrogenolysis of C-6 alkanes, competitive hydrogenation of benzene-toluene mixtures, and selective hydrogenation of crotonaldehyde. To provide points of reference, many of these measurements will also be done using platinum on zeolite-Y and platinum on silica. The reaction studies are done in collaboration with Dr. Daniel Resasco of the University of Mar del Plata in Argentina. Catalysts based on zeolite-L and containing platinum-group metals represent the newest generation of reforming catalysts used to upgrade gasoline in refineries. Both oil and catalyst companies are actively seeking new formulations, but systematic studies are rare. This work not only sheds light on how these systems work, but could possibly lead directly to improved formulations.

这是一个调查的金属支持相互作用， 铂/沸石-L，使用物理和 化学探针 试图描述 铂颗粒和沸石-L之间的相互作用使用X- 射线吸收（近边（XANES）和精细结构 （EXAFS）光谱）和核磁共振 氢1和碳13。 这些研究的结果 与催化活性和化学吸附有关， 氢、氧、一氧化碳、苯和甲苯。 测试 使用的反应包括异构化和氢解 C6烷烃，苯-甲苯竞争加氢 混合物和巴豆醛的选择性氢化。 到 提供参考点，其中许多测量将 也可以使用沸石-Y上的铂和沸石-Y上的铂进行。 硅石 反应研究是与以下机构合作完成的： 马德普拉塔大学的丹尼尔雷萨斯科博士在 Argentina. 基于沸石-L并含有铂族的催化剂 金属是最新一代的重整催化剂 用于精炼汽油。 油和催化剂 公司正在积极寻求新的配方，但 系统的研究很少。 这项工作不仅揭示了 这些系统是如何工作的，但可能会直接导致 改进配方。