Laser-based spectroscopic system for in-situ diagnosis of particle/gas reactive flows

用于颗粒/气体反应流现场诊断的激光光谱系统

• 批准号: 527806316
• 金额: --
• 依托单位: Otto-von-Guericke-Universität Magdeburg
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2023
• 资助国家: 德国
• 起止时间: 2022-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/527806316?language=en
• 关键词: Laser; based; spectroscopic; system; situ

The requested "Laser-based spectroscopic system for in-situ diagnosis of particle/gas reactive flows will enable time-resolved, in-situ, physico-chemical characterization of particle-laden flows as well as of the surrounding gas in high-temperature complex reactive systems. Thanks to ist great versatility, several spectroscopic techniques will be applied, depending on the targeted properties of interest and on the reactive system. Laser-induced breakdown spectroscopy, planar laser-induced incandescence, and planar laser-induced fluorescence constitute the core diagnostics pursued with this system by the main applicant. The characterization of particles/aerosols in flows, including chemical composition and physical properties (e.g., particle size, concentration, and morphology), is highly relevant for many industrial production and emission processes. Optical diagnostics offer clear advantages for this highly challenging characterization thanks to the possibility of analyzing simultaneously and in a non-intrusive manner several physico-chemical properties with an excellent spatio-temporal resolution and high sensitivity and selectivity. This is needed to obtain new insights in (I) the processes involved in the formation of particles/aerosols from the precursor gas, (II) the interactions between the particles/aerosols with the surroundings, and (III) the implementation of online control approaches, to be able to develop novel design and optimization methods. In the current and planned research projects of the applicants, the main utilization of the requested system is centered on the in-situ physico-chemical characterization of particles/aerosols either formed in the gas phase or entrained directly in the gas-phase, principally in the framework of the thermochemical conversion of biomass and plastics for the production of materials and chemicals. Such experimental approach, combining the different spectroscopic techniques for the on-line, in-situ characterization of particles/aerosols as well as the surrounding gas in the above introduced field is first of ist kind to the knowledge of the applicants. The requested system includes a laser configured to work with high-energy pulses in the IR, visible, and (deep) UV regions, a detector able to provide, with high spectral resolution and sensitivity, the requested information from the reactive systems, the software and computer able to both operate the system and process the data, and the accessories necessary for laser and signal guidance.

所要求的“用于现场诊断颗粒/气体反应流的基于激光的光谱系统”将能够对高温复杂反应系统中的颗粒负载流以及周围气体进行时间分辨的现场物理化学表征。由于它的多功能性，几种光谱技术将被应用，这取决于感兴趣的目标属性和反应系统。激光诱导击穿光谱、平面激光诱导白炽和平面激光诱导荧光构成了主申请人利用该系统进行的核心诊断。流中颗粒/气溶胶的表征，包括化学成分和物理性质（例如，粒度、浓度和形态）与许多工业生产和排放过程高度相关。光学诊断为这种极具挑战性的表征提供了明显的优势，这要归功于同时以非侵入性方式分析多种物理化学性质的可能性，具有出色的时空分辨率和高灵敏度和选择性。这需要获得以下方面的新见解：（I）从前体气体形成颗粒/气溶胶的过程，（II）颗粒/气溶胶与周围环境之间的相互作用，以及（III）在线控制方法的实施，以便能够开发新的设计和优化方法。在申请人的当前和计划的研究项目中，所请求的系统的主要利用集中在气相中形成或直接夹带在气相中的颗粒/气溶胶的原位物理化学表征上，主要是在用于生产材料和化学品的生物质和塑料的热化学转化的框架中。这种实验方法结合了不同的光谱技术，用于在线、原位表征上述领域中的颗粒/气溶胶以及周围气体，这是申请人所知的第一种方法。所请求的系统包括被配置为与IR、可见光和（深）UV区域中的高能脉冲一起工作的激光器、能够以高光谱分辨率和灵敏度提供来自反应系统的所请求的信息的检测器、能够操作系统并处理数据的软件和计算机、以及激光和信号引导所必需的附件。