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.

这项研究将推进碳纳米管基材料在多相催化应用中的最先进水平。 碳纳米管是一种具有特殊结构、电子、机械和化学性质的新型材料。 研究人员开发出了一种独特的能力，可以生产大量结构（直径和长度）受控的单壁碳纳米管（SWNT）。 该项目将利用这一能力，重点设计用于多相催化剂的独特分子筛载体，该载体具有以下特点：与典型沸石相比直径大、通道长度可调和化学惰性。还可以调整载体的酸度密度、一维性和增强的分子扩散率。 为了实现这一目标，将通过改变合成反应温度和通过优先氧化选择性去除小直径纳米管来调整单壁碳纳米管直径。 然后将合成具有不同金属和酸度含量的多相催化剂，并测试两个具有重要工业重要性的反应。 这些是烷烃的芳构化和芳烃在硫存在下的氢化。 对芳烃的环境担忧导致了限制芳烃处理和运输及其在柴油和汽油中含量的法规。 要研究的两种工艺在最大限度地减少处理芳烃和柴油燃料的环境影响方面发挥着重要作用。 为了扩大研究活动的影响，本科生、高中教师和选定的高中生将参与该项目。 与美国印第安人学生协会合作，将选择少数族裔工程学生加入该研究项目。