Methanol and Hydrocarbon Catalysis of Palladium Particles and Palladium Carbonyl Clusters in Sodium Zeolite-Y

钠沸石-Y 中钯颗粒和羰基钯簇的甲醇和烃催化

• 批准号: 8911184
• 负责人: Wolfgang Sachtler
• 金额: $ 23.26万
• 依托单位: Northwestern 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: 1989-08-01 至 1993-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8911184&HistoricalAwards=false
• 关键词: Methanol; Hydrocarbon; Catalysis; Palladium; Particles

Recent success in preparing carbonyl complexes of palladium in the cages of sodium zeolite-Y using a "ship-in-a-bottle" technique potentially offers new catalytic processes exploiting both geometric and electronic properties of the zeolite. In this work, palladium catalysts on zeolite-Y are prepared, including some that are highly dispersed and some containing palladium clusters. These are characterized using, among other techniques, extend X-ray absorption fine structure, Fourier-transform infrared spectroscopy, temperature-programmed reaction, and temperature-programmed desorption. The exchangeability of carbon monoxide in gaseous, adsorbed, and ligand forms is determined using infrared spectroscopy and temperature-programmed isotope exchange. Catalytic activity for methanol synthesis, neopentance conversion, and related reactions are measured. The new class of catalysts investigated in this work is potentially revolutionary. It should offer types of selectivity not available with catalysts presently in use for a number of industrial processes. At present, it is difficult to predict how the activities of these new systems compare to those of older catalysts, but this effort should go a long way toward answering that.

钯羰基配合物的合成 使用“瓶中船”将钠沸石-Y笼 技术可能提供新的催化过程 利用了晶体的几何和电子性质， 沸石 在这项工作中，钯催化剂上的沸石-Y 制备，包括一些高度分散的， 含有钯簇。 这些特征在于使用， 除其他技术外，扩展X射线吸收精细 结构，傅里叶变换红外光谱， 程序升温反应，程序升温 解吸 一氧化碳在空气中的交换 气体，吸附，和配体形式是确定使用 红外光谱和程序升温同位素 交易所 甲醇合成催化活性， 测量新戊烷转化率和相关反应。 在这项工作中研究的新型催化剂是 可能是革命性的。 它应该提供 选择性是目前用于 一些工业过程。 目前， 来预测这些新系统的活动与 那些旧的催化剂，但这一努力应该走很长的路要走 回答这个问题