Dal Moro Riccardo, Melison Fabio, Cocola Lorenzo, Poletto Luca
National Research Council-Institute for Photonics and Nanotechnologies (CNR-IFN), Padova, Italy.
University of Padova, CISAS "G. Colombo", Padova, Italy.
Appl Spectrosc. 2024 Dec;78(12):1263-1269. doi: 10.1177/00037028241277575. Epub 2024 Sep 5.
A novel approach for cost-effective and temporally resolved in-line combustion gas diagnostics based on spontaneous Stokes Raman spectroscopy is presented in this paper. The proposed instrument uses a multipass configuration designed to increase the scattering generation, giving information about gas species concentrations, including H and N that are not commonly available from analysis with absorption spectroscopy techniques. The system performs calibrated analysis providing both qualitative and quantitative information about the gas composition. Depending on the application, the device can work with spectra integration time from 0.15 s up to 10 s, with a Raman spectrum ranging from the H rotational peak at Raman shift of 587 cm up to the H vibrational peak at 4156 cm, covering all the Raman emissions of major combustion species. The device response was characterized by a working pressure from 0.7 to 7.5 bar. The instrument prototype has been made completely transportable, designed to operate using a gas sampling system, and ready to be operated in relevant industrial in-line environments.
本文介绍了一种基于自发斯托克斯拉曼光谱的具有成本效益且能进行时间分辨的在线燃烧气体诊断新方法。所提出的仪器采用多程配置，旨在增加散射产生，提供有关气体成分浓度的信息，包括通过吸收光谱技术分析通常无法获得的氢和氮。该系统进行校准分析，提供有关气体成分的定性和定量信息。根据应用情况，该设备可在光谱积分时间从0.15秒到10秒的范围内工作，拉曼光谱范围从拉曼位移587厘米处的氢转动峰到4156厘米处的氢振动峰，涵盖了主要燃烧物种的所有拉曼发射。该设备的响应特性为工作压力范围从0.7到7.5巴。仪器原型已完全可运输，设计为使用气体采样系统运行，并准备好在相关工业在线环境中运行。
