权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

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，例如为发动机提供动力和从发电厂向家庭供电的化学，是复杂的。但了解这些化学过程对于提高能源效率和减少污染至关重要。很少有实验能够得到在复杂反应系统中发生的化学反应的完整化学图像，因为形成的许多关键分子种类是不稳定的，寿命很短。这项工作的重点是开发新的微反应器，可以在微秒级上探测化学，直接测量气相反应系统的基本化学。当与其他诊断相结合时，这些微反应器将提供发生的化学反应的几乎完整的化学图像。如果成功，这些提出的微反应器将是一个有价值的研究工具，将大大提高该领域测量气相反应化学产物的能力，从而产生更准确的动力学模型，从发动机设计到空气质量建模的广泛应用。这项工作的目的是设计和制造一种新型的微型反应器，用于燃烧和气相反应流的先进化学诊断。虽然微反应器以前被用于研究热解（热分解）反应，但由于基体碳化硅（SiC）与氧的反应性质以及反应器中不确定的压力和温度条件，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，以在反应器内产生稳定的热力学流体性质，从而准确确定反应温度和压力。然后，这些反应器将使用3d打印、铸造和微钻方法的组合来制造。计划建造两套反应器：一套将由碳化硅制成，与现有的热解反应器进行比较；另一套将由非反应性材料制成，如石英或蓝宝石，用于燃料氧化研究。这些反应堆的性能表征将通过一系列实验来完成，这些实验将探测燃料在反应环境中的温度和压力行为。这种功能强大的新仪器有可能帮助解开一些尚未解决的问题，比如烟灰是如何形成和破坏的，什么是点火的主要反应途径，以及污染物是如何与高层大气中的臭氧相互作用的。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。