A Highly Sensitive and Selective Laser-Based BTEX Sensor for Occupational and Environmental Monitoring
KAUST DepartmentMechanical Engineering Program
Physical Science and Engineering (PSE) Division
Clean Combustion Research Center
Permanent link to this recordhttp://hdl.handle.net/10754/692071
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AbstractA mid-infrared laser-based sensor is designed and demonstrated for trace detection of benzene, toluene, ethylbenzene, and xylene isomers at ambient conditions. The sensor is based on a distributed feedback inter-band cascade laser emitting near 3.29 μm and an off-axis cavity-enhanced absorption spectroscopy configuration with an optical gain of ~2800. Wavelength tuning and a deep neural networks (DNN) model were employed to enable simultaneous and selective BTEX measurements. The sensor performance was demonstrated by measuring BTEX mole fractions in various mixtures. At an integration time of 10 seconds, minimum detection limits of 11.4, 9.7, 9.1, 10, 15.6, and 12.9 ppb were achieved for benzene, toluene, ethylbenzene, m-xylene, o-xylene, and p-xylene, respectively. The sensor can be used to detect tiny BTEX leaks in petrochemical facilities and to monitor air quality in residential and industrial areas for workplace pollution.
CitationMhanna, M., Sy, M., Arfaj, A., Llamas, J., & Farooq, A. (2023). A Highly Sensitive and Selective Laser-Based BTEX Sensor for Occupational and Environmental Monitoring. https://doi.org/10.5194/egusphere-2023-514
SponsorsThis work was funded by the Environmental Protection Department (EPD) of Saudi Aramco (RGC/3/4749-01).
Except where otherwise noted, this item's license is described as This is a preprint version of a paper and has not been peer reviewed. Archived with thanks to Copernicus GmbH under a Creative Commons license, details at: https://creativecommons.org/licenses/by/4.0/