Development of a Micro-electromechanical Photoacoustic Spectrometer for Industrial Applications and the Study of SO2 at High Temperatures

工业应用微机电光声光谱仪的开发及高温下 SO2 的研究

• 批准号: EP/K034758/1
• 负责人: Michael Lengden
• 金额: $ 12.64万
• 依托单位: University of Strathclyde
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2013
• 资助国家: 英国
• 起止时间: 2013 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FK034758%2F1
• 关键词: Development; Micro; electromechanical; Photoacoustic; Spectrometer

This proposal aims to develop a highly sensitive gas sensor, combining photo-acoustic spectroscopy with micro-electromechanical (MEMS) technology. In conjunction with the sensor development, a new high temperature gas spectrometer will be developed to measure the spectral parameters of gas species, such as linestrength and collisional broadening coefficients, and their temperature dependence in the mid infra-red region of the electromagnetic spectrum. The sensor development will initially target a specific application, the measurement of sulphide gas species during the desulphurisation of natural gas and gas obtained from coal gasification. Coal gasification and natural gas are the likely fuel for large-scale Solid Oxide Fuel Cells, one of the many distributed power generation strategies being considered to reduce carbon dioxide emissions. Without the desulphurisation process, the sulphide species gases present in the fuel source will poison the electrodes of the fuel cell, initially reducing efficiency but ultimately leading to system failure. Monitoring the sulphide species content of the gas entering the fuel cell using an in-situ optical technique will provide a fail-safe solution and reduce the risk of failure. In standard laser spectroscopy optical detectors are needed, however, in the mid-IR these detectors are expensive and need to temperature stabilised. The use of photoacoustic spectroscopy eliminates the necessity for an optical detector, allowing the gas sensor to be easily adapted to monitor a wide-range of gas species, with the major limitation of the sensor being the availability of an appropriate optical source. The use of a MEMS device to detect the acoustic signal, induced by the laser-gas interaction, provides further advantages as it is robust, cheap to develop with a resonant frequency and high Q-factor, making ideal for operation in industrial environments. This will allow a number of future applications to be targeted including explosives detection, gas leak detection, medical diagnostics, atmospheric monitoring and combustion product analysis.

该提案旨在开发一种高灵敏度的气体传感器，结合光声光谱与微机电（MEMS）技术。在传感器开发的同时，将开发一种新的高温气体光谱仪，以测量气体种类的光谱参数，例如线强度和碰撞增宽系数，以及它们在电磁光谱中红外区域的温度依赖性。传感器的开发最初将针对一个特定的应用，即在天然气和煤气化获得的气体的脱硫过程中测量硫化物气体种类。煤气化和天然气是大规模固体氧化物燃料电池的可能燃料，这是正在考虑的减少二氧化碳排放的许多分布式发电策略之一。在没有脱硫过程的情况下，燃料源中存在的硫化物类气体将使燃料电池的电极中毒，最初降低效率，但最终导致系统故障。使用原位光学技术监测进入燃料电池的气体的硫化物物质含量将提供故障安全解决方案并降低故障风险。在标准的激光光谱学中，需要光学探测器，然而，在中红外，这些探测器是昂贵的，并且需要温度稳定。光声光谱的使用消除了光学检测器的必要性，允许气体传感器容易地适于监测宽范围的气体种类，其中传感器的主要限制是适当光源的可用性。使用MEMS装置来检测由激光-气体相互作用引起的声信号提供了进一步的优点，因为它是鲁棒的，开发成本低，具有谐振频率和高Q因子，非常适合在工业环境中操作。这将使许多未来的应用成为目标，包括爆炸物检测，气体泄漏检测，医疗诊断，大气监测和燃烧产物分析。

项目成果

MIR Photoacoustic Trace Gas Sensing Using a Miniaturized 3D Printed Gas Cell

使用微型 3D 打印气体池进行 MIR 光声痕量气体传感

• DOI: 10.1364/sensors.2015.set1c.3
• 发表时间: 2015
• 作者: Bauer R

All-optical fiber multi-point photoacoustic spectroscopic gas sensing system

• DOI: 10.1364/ofs.2018.wf17
• 发表时间: 2018-09
• 作者: Congzhe Zhang;Yuanhong Yang;Yuechuan Lin;Yanzhen Tan;M. Lengden;G. Humphries;W. Johnstone;H. Ho;W. Jin

Performance of a 3D printed photoacoustic sensor for gas detection in mid-infrared

用于中红外气体检测的 3D 打印光声传感器的性能

• DOI: 10.1109/icsens.2017.8234370
• 发表时间: 2017
• 作者: Ilke M

Performance Comparison of 3-D Printed Photoacoustic Gas Sensors and a Commercial Quartz Enhanced Photoacoustic Spectrometer

• DOI: 10.1109/jsen.2023.3335649
• 发表时间: 2024-01
• 期刊: IEEE Sensors Journal
• 影响因子: 4.3
• 作者: Utkarsh Dwivedi;Mark Donnachie;Metin Ilke;Ralf Bauer;M. Lengden

Miniaturized Photoacoustic Trace Gas Sensing Using a Raman Fiber Amplifier

• DOI: 10.1109/jlt.2015.2443377
• 发表时间: 2015-09
• 期刊: Journal of Lightwave Technology
• 影响因子: 4.7
• 作者: R. Bauer;T. Legg;David Mitchell;G. Flockhart;G. Stewart;W. Johnstone;M. Lengden