EAGER: Soot Archeology - Fullerenic Nanostructure as an Indicator of C5 Precursor Chemistry

本研究旨在建立碳烟纳米结构中燃料空气比与曲率之间的关系。部分预混合为多环芳烃（PAHs）部分氧化形成烟尘提供了新的途径。因此，第一个目标是利用以C5前体物质为燃料的简单气体喷射扩散火焰来证明C5元环与烟灰中富勒烯纳米结构的相关性。第二个目标是演示C5生产，通过部分预混使用本生火焰配置。第三个目标是测试不同温度下富勒烯的形成情况，以便与使用真实燃料和替代燃料的扁平火焰燃烧器的模型计算结果进行比较。建模将用于指导实验工作，并支持纳米结构与气相化学之间的相关性。计算和测量的温度场将作为温度-时间剖面的输入。本研究结果将开创一种利用富勒烯纳米结构作为部分预混示踪剂的新模式。通过显示纳米结构和特定前体物种之间的明确联系，本研究将为推断？根据在烟灰中观察到的曲率程度，在实际的燃烧器和发动机的烟灰形成区域内。除了燃烧方面的兴趣，证明分子生长种类和固态结构之间的关系将刺激通过CVD或热解过程合成的碳纳米材料的建模研究，包括富勒烯、纳米管和石墨烯。

This proposal seeks to establish a correlation between fuel-air ratio and curvature in soot nanostructure. Partial pre-mixing contributes new pathways to soot formation via partial oxidation of polycyclic aromatic hydrocarbons (PAHs). Accordingly the first objective is to demonstrate the relevance of C5-membered rings to fullerenic nanostructure in soot using a simple gas jet diffusion flame fueled with C5 precursor species. The second objective is demonstrating C5 production, via partial premixing using a Bunsen flame configuration. The third objective is to test fullerenic formation across temperatures for comparison to model calculations using a flat flame burner fueled with real and surrogate fuels. Modeling will be used to guide experimental efforts and support the correlations sought between nanostructure and gas phase chemistry. Calculated and measured temperature fields will serve as input to temperature-time profiles. Results of this study will create a new paradigm ¡V using fullerenic nanostructure as a tracer for partial premixing. By showing a definitive link between nanostructure and specific precursor species this study will provide a foundation for inferring ?¶ within soot forming regions of practical combustors and engines based upon the degree of curvature observed in the soot. Beyond combustion interests, demonstrating a relation between molecular growth species and solid-state structure would spur modeling studies across carbon nanomaterials as synthesized via CVD or pyrolysis processes, including fullerenes, nanotubes and graphene.