Ultrafine Inorganic Particle Formation in Plasma-Assisted Combustion

等离子体辅助燃烧中超细无机颗粒的形成

• 批准号: 2132655
• 负责人: Daoru Han
• 金额: $ 33万
• 依托单位: Missouri University of Science and Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2132655&HistoricalAwards=false
• 关键词: Ultrafine; Inorganic; Particle; Formation; Plasma

Particulate matter in the atmosphere leads to reduced air quality, poses health issues, and complicates climate prediction. On a global scale, fossil fuel combustion contributes to as much as 85% of the particulate matter in the atmosphere. Plasma-assisted combustion is a promising technology that may reduce emissions, improve combustion efficiency, and enhance low-temperature fuel combustion. However, the formation of particulate matter in plasma-assisted combustion has not been studied in detail. This research plans to examine particle formation in common plasma-assisted combustion systems. The properties of particles will be studied using a suite of novel particle characterization instruments and modeling methods focusing on particles with sizes ranging from 1 to 100 nm. The successful completion of this project will benefit society through the development of new knowledge to understand particle formation in this novel fossil fuel combustion technique. Further benefits to society will be achieved through student education, training, and public outreach. STEM training will be enhanced through integration of research findings into course modules, participation of researchers in K-12 summer science camps, and a partnership with the Rolla, MO Public Library to disseminate the project findings to the public.Limited studies have shown that plasma could potentially reduce particle formation due to kinetic, thermal, hydrodynamic, or a combination of these effects, but detailed mechanisms or relative importance of each effect have not been deconvoluted. These studies left several fundamental questions unanswered: How do ultrafine particle formation mechanisms in plasma-assisted combustion differ from conventional combustion? How do we deconvolute the thermal, kinetic, and hydrodynamic effects of plasma on particle formation during combustion? How can we accurately model ultrafine particle formation in plasma-assisted combustion to predict emission characteristics? This project proposes to answer these questions by deploying a series of recently developed aerosol instruments and modeling tools to probe particle dynamics with scales down to 1 nm. This work has the potential to produce a transformative understanding of particle formation in plasma-assisted combustion.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.

大气中的颗粒物导致空气质量下降，造成健康问题，并使气候预测复杂化。在全球范围内，大气中高达85%的颗粒物是由化石燃料燃烧产生的。等离子体辅助燃烧是一种很有前途的技术，可以减少排放，提高燃烧效率，增强低温燃料燃烧。然而，等离子体辅助燃烧中颗粒物质的形成尚未得到详细的研究。这项研究计划检查粒子形成在普通等离子体辅助燃烧系统。粒子的性质将使用一套新颖的粒子表征仪器和建模方法进行研究，重点关注大小从1到100纳米的粒子。该项目的成功完成将通过开发新的知识来了解这种新型化石燃料燃烧技术中的颗粒形成，从而造福社会。通过对学生的教育、培训和公众宣传，进一步造福社会。通过将研究成果整合到课程模块中，研究人员参与K-12暑期科学营，以及与密苏里州罗拉公共图书馆合作向公众传播项目成果，STEM培训将得到加强。有限的研究表明，等离子体可能由于动力学、热、流体动力学或这些效应的组合而潜在地减少粒子的形成，但详细的机制或每种效应的相对重要性尚未得到解决。这些研究没有回答几个基本问题：等离子体辅助燃烧的超细颗粒形成机制与传统燃烧有何不同？我们如何解开燃烧过程中等离子体对颗粒形成的热、动力学和流体动力学影响？我们如何准确地模拟等离子体辅助燃烧中超细颗粒的形成，以预测排放特性？该项目提出通过部署一系列最近开发的气溶胶仪器和建模工具来探测颗粒动力学，其尺度缩小到1纳米，从而回答这些问题。这项工作有可能对等离子体辅助燃烧中的粒子形成产生革命性的理解。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。

项目成果

Mapping the performance of a versatile water-based condensation particle counter (vWCPC) with numerical simulation and experimental study

• DOI: 10.5194/amt-16-3973-2023
• 发表时间: 2023-09
• 期刊: Atmospheric Measurement Techniques
• 影响因子: 3.8
• 作者: Weixing Hao;F. Mei;Susanne Hering;Steven Spielman;Beat Schmid;Jason Tomlinson;Yang Wang

Ions Generated from a Premixed Methane-Air Flame: Mobility Size Distributions and Charging Characteristics

预混合甲烷-空气火焰产生的离子：迁移率尺寸分布和充电特性

• DOI: 10.1080/00102202.2023.2203818
• 发表时间: 2023
• 期刊: Combustion Science and Technology
• 影响因子: 1.9
• 作者: Bagya Ramesh, Chanakya;Wang, Yang
• 通讯作者: Wang, Yang

Kinetic Particle Simulations of Plasma Charging at Lunar Craters Under Severe Conditions

• DOI: 10.2514/1.a35622
• 发表时间: 2023-02
• 期刊: Journal of Spacecraft and Rockets
• 影响因子: 1.6
• 作者: D. Lund;Xiaoming He;D. Han

Optimizing the activation efficiency of sub-3 nm particles in a laminar flow condensation particle counter: Model simulation

优化层流凝聚粒子计数器中亚 3 nm 粒子的激活效率：模型模拟

• DOI: 10.1016/j.jaerosci.2021.105841
• 发表时间: 2021
• 期刊: Journal of Aerosol Science
• 影响因子: 4.5
• 作者: Hao, Weixing;Stolzenburg, Mark;Attoui, Michel;Zhang, Jiaoshi;Wang, Yang
• 通讯作者: Wang, Yang