Collaborative Research: Plasma Assisted Ammonia Combustion: Stabilization and Emission Reduction

合作研究：等离子体辅助氨燃烧：稳定和减排

• 批准号: 2002836
• 负责人: Wenting Sun
• 金额: $ 28.2万
• 依托单位: Georgia Tech Research Corporation
• 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: 2021-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2002836&HistoricalAwards=false
• 关键词: Collaborative; Research; Plasma; Assisted; Ammonia

Ammonia is considered as a renewable fuel. However, ammonia combustion suffers from two major issues which are preventing its practical application. One is that ammonia flame is very unstable and can easily get extinguished. The other issue is its high emission, which pollutes the environment. In this project, a collaborative team will investigate using plasma (electric discharge) to enhance ammonia combustion process and reduce emission at the same time. The plasma-ammonia combustion interaction has not been studied previously. This award will investigate the underlying physical and chemical processes using experimental and computational tools. The new insights gained from experimental data will be used to develop computational models that can be used in research related to renewable energy. In this project, undergraduate and graduate students will receive hands-on training in experimental and computational skills. They become new contributors to the science, technology, engineering, and mathematics (STEM) workforce of United States. Significant opportunities exist at both University of Minnesota and Georgia Institute of Technology to engage underrepresented students and researchers.The goal of this project is to understand the physical and chemical processes to stabilize ammonia flames and reduce NOx emission simultaneously by non-equilibrium plasma. This project has two key hypotheses: (1) prompt ammonia oxidation/decomposition introduced by plasma enhances flame; (2) the production of NH and NH2 from plasma reduces NOx emission. Accordingly, the scope and objectives of this proposed research are: (i) investigation of fundamental ammonia plasma chemical kinetics to understand its prompt dissociation and oxidation induced by plasma at different values of reduced electric field (E/N). This will be achieved by conducting experiments in a flow reactor with speciation measurement and one-dimensional (1D) numerical simulations with detailed plasma and combustion chemical kinetics; (ii) investigation of interactions between plasma kinetics and flame dynamics (including lean blow-off and thermoacoustic combustion instability) by conducting experiments in a model gas turbine combustor using NH, NH2, NO and OH planar laser induced fluorescence (PLIF) and three-dimensional (3D) direct numerical simulations (DNS) with a simplified plasma model deduced from detailed 1D modeling. The experimental work will be conducted by the Georgia Institute of Technology team and the numerical work will be conducted by the University of Minnesota team.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.

氨被认为是一种可再生燃料。然而，氨燃烧存在两个主要问题，阻碍了它的实际应用。一是氨火焰非常不稳定，很容易熄灭。另一个问题是它的高排放，污染环境。在这个项目中，一个合作团队将研究使用等离子体（放电）来增强氨燃烧过程，同时减少排放。等离子体-氨燃烧的相互作用以前没有被研究过。该奖项将使用实验和计算工具研究潜在的物理和化学过程。从实验数据中获得的新见解将用于开发可用于可再生能源相关研究的计算模型。在这个项目中，本科生和研究生将接受实验和计算技能的实践训练。他们成为美国科学、技术、工程和数学（STEM）劳动力的新贡献者。明尼苏达大学和佐治亚理工学院都有大量的机会来吸引代表性不足的学生和研究人员。该项目的目标是了解通过非平衡等离子体稳定氨火焰和减少NOx排放的物理和化学过程。本项目有两个关键假设：(1)等离子体引入快速氨氧化/分解增强火焰；(2)等离子体产生的nhh和NH2减少了NOx的排放。因此，本研究的范围和目标是：(1)研究氨的基本等离子体化学动力学，以了解在不同的还原电场（E/N）值下等离子体对氨的快速解离和氧化。这将通过在流动反应器中进行实验，进行形态测量和一维（1D）数值模拟，详细的等离子体和燃烧化学动力学；（ii）通过在模型燃气轮机燃烧室中使用NH、NH2、NO和OH平面激光诱导荧光（PLIF）和三维（3D）直接数值模拟（DNS）进行实验，研究等离子体动力学和火焰动力学之间的相互作用（包括稀薄排气和热声燃烧不稳定性），并通过详细的一维建模推导出简化的等离子体模型。实验工作将由佐治亚理工学院团队进行，数值工作将由明尼苏达大学团队进行。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

Experimental investigation of non-equilibrium plasma-assisted ammonia flames using NH2* chemiluminescence and OH planar laser-induced fluorescence

利用 NH2* 化学发光和 OH 平面激光诱导荧光进行非平衡等离子体辅助氨火焰的实验研究

• DOI: 10.1016/j.proci.2022.07.001
• 发表时间: 2023
• 期刊: Proceedings of the Combustion Institute
• 影响因子: 3.4
• 作者: Choe, Jinhoon;Sun, Wenting
• 通讯作者: Sun, Wenting