EAGER: Design and Fabrication of a Novel Micro-Reactor for Molecular Sampling of Combustion

EAGER：设计和制造用于燃烧分子采样的新型微反应器

基本信息

批准号：
1834656
负责人：
Nicole Labbe
金额：
$ 8.11万
依托单位：
University of Colorado at Boulder
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-05-01 至 2019-10-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1834656&HistoricalAwards=false
关键词：
EAGER Design Fabrication Novel Micro

项目摘要

High-temperature gas-phase chemistry, such as the chemistry responsible for powering engines and supplying electricity from power plants to homes, is complicated. But it is critical to understand these chemical processes to make advancements in energy efficiency and pollution reduction. Few experiments exist that can get a full chemical picture of the chemistry occurring in complex reacting systems, since many of the critical molecular species formed are unstable with very short lifetimes. This work focuses on the development of new micro-reactors that can probe the chemistry on the order of microseconds to directly measure the fundamental chemistry of gas-phase reactive systems. When coupled with other diagnostics, these micro-reactors will give a nearly full chemical picture of the chemistry that occurs. If successful, these proposed micro-reactors will be a valuable research tool that will significantly enhance the ability of the field to measure the chemical products of gas-phase reactions, leading to more accurate kinetic models with wide ranging applications from engine design to air quality modeling.The objective of this proposed work is to design and fabricate a novel micro-reactor for advanced chemical diagnostics for combustion and gas-phase reactive flows. While micro-reactors have been used to study pyrolysis (thermal decomposition) reactions previously, these reactors are limited in their experimental capabilities due to the reactive nature of the base material, silicon carbide (SiC) with oxygen and uncertain pressure and temperature conditions in the reactor. To directly address these issues, computational analysis will be employed to redesign the geometry of the reactor to produce stable thermodynamic fluid properties within the reactor, leading to accurate determination of reaction temperature and pressure. Then, these reactors will be fabricated using a combination of 3-D printing, casting, and micro-drilling methods. Two sets of reactors are planned: one set will be made of SiC for comparison to existing pyrolysis reactors and a second set will be made of non-reactive materials, such as quartz or sapphire, for fuel oxidation study. Performance characterization of these reactors will be completed through a series of experiments that probe the temperature and pressure behavior of fuels in a reactive environment. This powerful new instrument has the potential to help unravel still unanswered questions such as how soot is formed and destroyed, what are the dominant reaction paths for ignition, and how do pollutants interact with ozone in the upper atmosphere.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

高温气相化学（例如负责为发动机供电的化学反应和从发电厂提供电力到房屋的电力）很复杂。但是，要了解这些化学过程以取得能源效率和降低污染的进步至关重要。很少有实验可以得到复杂反应系统中化学反应的完整化学图，因为形成的许多关键分子物种在寿命很短的情况下都是不稳定的。这项工作的重点是开发新的微反应器，这些微反应器可以在微秒的顺序上探测化学，以直接测量气相反应性系统的基本化学。当与其他诊断机构结合使用时，这些微反应器将提供几乎完整的化学图片。如果成功，这些提议的微反应器将是一种有价值的研究工具，将显着增强该领域测量气相反应的化学产品的能力，从而导致更准确的动力学模型，具有从发动机设计到空气质量建模的广泛应用。这项建议的工作的目的是设计和制造出新型的微型化学效果和化学耐药性的新型微型化学反应和加油。虽然以前已使用微反应器来研究热解（热分解）反应，但由于基本材料的反应性，碳化硅（SIC），反应器中的压力和温度条件不确定，这些反应器的实验能力受到限制。为了直接解决这些问题，将采用计算分析来重新设计反应器的几何形状，以在反应堆内产生稳定的热力学流体特性，从而准确确定反应温度和压力。然后，将使用3-D打印，铸造和微滴定方法的组合制造这些反应器。计划了两组反应堆：将用SIC制成一组，以与现有的热解反应器进行比较，第二组将由非反应性材料（例如石英或蓝宝石）制成，以进行燃料氧化研究。这些反应器的性能表征将通过一系列实验完成，该实验探测反应性环境中燃料的温度和压力行为。这种强大的新仪器具有帮助解开诸如SOOT的形成和破坏之类的问题，诸如点火点火的主要反应路径以及如何在高层大气中与臭氧相互作用的主要反应路径。该奖项反映了NSF的法定任务，并通过该基金会的知识优点和广泛的效果来评估NSF的法定任务，并通过评估值得进行评估。