Hydrocarbon Surface Reactions Over Transition Metals

过渡金属上的碳氢化合物表面反应

• 批准号: 8700876
• 负责人: John Ekerdt
• 金额: $ 12.63万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-09-01 至 1990-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8700876&HistoricalAwards=false
• 关键词: Hydrocarbon; Surface; Reactions; Over; Transition

This work seeks to develop a quantitative understanding of the variables that influence the activity and selectivity of the reactions of hydrocarbons over supported metals. The work is relevant both to the catalytic production of hydrocarbons (including synfuels) and to the activation of hydrocarbons and their conversion into more complex products for use as industrial feedstocks, fuels, or other end uses. Simple hydrocarbons are studied over supported metals having different physical morphologies in the presence and absence of coadsorbed species. The adsorbed hydrocarbon species are characterized using transmission infrared spectroscopy and the rates of transformation into more stable surface species are monitored using in situ infrared techniques. Attempts are made to measure the rates of carbon-hydrogen and of carbon-carbon bond scission and to quantify the effects of particle size and morphology on the concentration and inherent reactivity of adsorbed hydrocarbon fragments. The study emphasizes the behavior of two-carbon hydrocarbons (ethane, ethylene, and acetylene) on crystallites of nickel or platinum supported on alumina or silica.

这项工作的目的是发展一个定量的理解， 影响催化剂活性和选择性的变量 烃类在负载金属上的反应。 这项工作是 与烃的催化生产有关 （包括合成燃料）和烃的活化， 将其转化为更复杂的产品， 工业原料、燃料或其他最终用途。 简单 研究了在具有不同碳原子数的负载金属上的烃。 存在和不存在共吸附的物理形态 物种 吸附的烃物种的特点是 使用透射红外光谱法和 监测转化成更稳定的表面物种 使用原位红外技术。 试图测量 碳-氢和碳-碳键断裂的速率 并量化颗粒尺寸和形态对 吸附烃的浓度和固有反应性 片段 该研究强调了双碳的行为 碳氢化合物（乙烷，乙烯和乙炔）的微晶 负载在氧化铝或二氧化硅上的镍或铂。