Novel Molecular Sieve Catalysts Based on Single-walled Carbon Nanotubes

基于单壁碳纳米管的新型分子筛催化剂

• 批准号: 0308619
• 负责人: Daniel Resasco
• 金额: $ 23万
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0308619&HistoricalAwards=false
• 关键词: Novel; Molecular; Sieve; Catalysts; Based

This research will advance the state-of-the-art of carbon nanotube-based materials for applications in heterogeneous catalysis. Carbon nanotubes are a novel material with unusual structural, electronic, mechanical and chemicalproperties. The researchers have developed a unique capability to produce sizeable quantities of single-walled carbon nanotubes (SWNT) with controlled structure (diameter and length). The project will capitalize on this capabilityby focusing on the design of unique molecular sieve supports forheterogeneous catalysts, which would have the following characteristics:large diameter compared to typical zeolites, adjustable channel length, andchemical inertness. There is also the possibility of adjusting the support's aciditydensity, one-dimensionality, and enhanced molecular diffusivity. To reachthis goal, the SWNT diameters will be adjusted by modifying the synthesisreaction temperature and by selectively removing small diameter nanotubes bypreferential oxidation. Heterogeneous catalysts will then be synthesized with varying metal and acidity contents and tested for two reactions of great industrial importance. These are the aromatization of alkanes and the hydrogenation of aromatics in the presence of sulfur. Environmental concerns about aromatics have resulted in regulation that limit their handling and transportation as well as their content in diesel fuels and gasolines. The two processes to be investigated play an important part in minimizing the environmental impact of handling aromatics and diesel fuels. In order to broaden the impact of the research activities, undergraduate students,high-school teachers and selected high school students will participate inthe project. In collaboration with the American Indian Student Association,minority Engineering students will be selected to join the research program.

这项研究将推动基于碳纳米管的最新材料，用于用于异质催化的应用。 碳纳米管是一种新颖的材料，具有异常的结构，电子，机械和化学物质。 研究人员开发了独特的能力，可生产具有控制结构（直径和长度）的大量单壁碳纳米管（SWNT）。 该项目将利用这一能力，重点是设计独特的分子筛子支持过渡性催化剂，该催化剂具有以下特征：与典型的沸石相比，直径较大，可调节的通道长度和化学惰性。还有可能调整支持的酸度密度，一维和增强的分子扩散率。 为了达到目标，将通过修改合成温度的温度和选择性去除小直径纳米管多次氧化来调整SWNT直径。 然后，异质催化剂将与金属和酸度含量变化合成，并测试了两种具有巨大工业重要性的反应。 这些是在存在硫的情况下烯烃的芳香化和芳香族的氢化。 对芳香剂的环境关注导致了限制其处理和运输以及其在柴油燃料和汽油中的内容的监管。 要研究的两个过程在最大程度地降低处理芳香族和柴油燃料的环境影响方面起着重要作用。 为了扩大研究活动的影响，本科生，高中老师和精选的高中生将参加该项目。 与美洲印第安学生协会合作，将选择少数族裔工程专业的学生加入研究计划。