Collaborative Research: ECLIPSE: Exploring Non-Oxidative Reaction Pathways of Atmospheric Pressure Plasmas

合作研究：ECLIPSE：探索大气压等离子体的非氧化反应途径

• 批准号: 2308857
• 负责人: Katharina Stapelmann
• 金额: $ 33.43万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-07-01 至 2026-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2308857&HistoricalAwards=false
• 关键词: Collaborative; Research; ECLIPSE; Exploring; Non

This award supports a collaborative project between North Carolina State University, Clarkson University, and Texas A&M University to explore chemical reaction pathways in low temperature plasmas. The field of low temperature plasmas (LTPs) encompasses applications ranging from microelectronics fabrication and human implants to lasers and solar cell manufacturing. The success of the development of these technologies relies on the reactions of plasma-generated ions and free radicals. While extensive work has been conducted to identify and quantify reactive oxygen and nitrogen species, the generation mechanisms and subsequent reactions of non-oxidative species such as ions and metastable atoms produced by the plasma are largely unknown. These species have been proposed to be deployed for a range of unique plasmochemical transformations, including the removal of toxic per- and polyfluoroalkyl substances (PFAS) known as ''forever chemicals'' from water using multiphase gas-liquid plasma reactors. This project aims to accelerate the development and scale up of plasma reactors to degrade and destroy PFAS, and is supported under the ECosystem for Leading Innovation in Plasma Science and Engineering (ECLIPSE) and Critical Aspects of Sustainability (CAS): Innovative Solutions to Sustainable Chemistry (CAS-SC) programs. The project seeks to elucidate non-oxidative chemical reaction mechanisms and pathways of photons, metastables, radicals, and charged particles generated by atmospheric pressure plasmas in contact with liquid water. The central approach for achieving these objectives involves measuring removal rates of four nonoxidizable fluorinated compounds in three gas-liquid plasma reactors of well-defined hydrodynamics and correlating them to the fluxes delivered from two different atmospheric pressure plasma jet devices. The central hypothesis of this effort is that solvated electrons and hydrogen radicals are the key species involved in non-oxidative chemical transformations. The mechanisms underlying the degradation of short-chain PFAS are of particular interest, as these compounds have proven to be extremely challenging to treat. This project involves students at all levels, from K-12 to graduate, including those from under-served communities. Major activities include development of a portable plasma-water demonstration setup for high school students, organization of a Chemical Engineering Workshop at a local children’s museum, participation in plasma summer schools, and utilizing social media platforms to create a series of exciting and engaging technical videos to encourage public interest in science.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.

该奖项支持北卡罗来纳州立大学，克拉克森大学和德克萨斯A＆M大学之间的合作项目，以探索低温等离子体的化学反应途径。低温等离子体（LTPS）的领域包括从微电子制造和人类侵入到激光和太阳能电池制造的应用。这些技术的发展成功取决于血浆生成的离子和自由基的反应。虽然已经进行了广泛的工作来识别和量化活性氧和氮种，但在很大程度上未知，诸如离子和血浆产生的非氧化物种（例如离子和可稳定原子）的产生机理和随后的反应是未知的。已经提议将这些物种用于一系列独特的浆化转化，包括使用多相气体液等离子体反应器从水中清除被称为“永远的化学物质”的有毒人类和多氟烷基物质（PFA）。该项目旨在加快等离子体反应堆的发展和扩展以降低和破坏PFA，并在血浆科学和工程领导的领先创新（Eclipse）的生态系统下得到支持，可持续性（CAS）：可持续化学（CAS-SC）计划的创新解决方案（CAS）。该项目旨在阐明与液态水接触的大气压力等离子体产生的照片，弹药，自由基和带电的颗粒的非氧化化学反应机制和途径。实现这些目标的中心方法涉及测量在三种定义明确的流体动力学的三种气液等离子体反应器中的四种非氧化氟化化合物的去除率，并将它们与从两个不同大气压力等离子射流设备传递的通量相关联。这项工作的中心假设是解决的电子和氢自由基是参与非氧化化学转化的关键物种。短链PFA降解的基础机制特别有趣，因为这些化合物已被证明是极其挑战的。该项目涉及从K-12到研究生的各个级别的学生，包括服务不足社区的学生。主要活动包括为高中生开发便携式血浆演示设置，在当地儿童博物馆举行的化学工程研讨会的组织，参加血浆暑期学校，并利用社交媒体平台来创建一系列令人兴奋的技术视频，以鼓励公众在科学方面的兴趣。这一奖项反映了NSF的法定宣传和众多的范围，这是由众多的构成范围的，这是由众多的构成范围的，并且是众多的支持。