Researchers from the State Key Laboratory of Precision Spectroscopy, East China Normal University, have developed a novel mobile system for outdoor trace gas detection. Their work, published in the journal Optica, presents a vehicle-mounted mid-infrared dual-comb spectrometer that could have significant implications for the energy sector and other industries.
The team, led by Professor Wenxue Li, has created a system that can precisely identify and quantify atmospheric trace gases, even under varying outdoor conditions. The key to their innovation lies in the use of optical-optical modulated frequency combs (OMFCs), which allow for passive mutual coherence between two combs. This enables the system to perform point-by-point and drive-by measurements with high temporal and spatial resolution.
The researchers demonstrated the system’s capabilities by mapping the two-dimensional concentration field and the concentration probability distribution near a methane (CH4) source. They compared their findings with the contemporaneous wind rose, validating the system’s accuracy. The system achieved minimum detection limits of 45 parts per billion (ppb) for methane and 46 parts per million (ppm) for water vapor (H2O) at a 100-second averaging time.
For the energy industry, this technology could be a game-changer. Accurate and real-time detection of methane leaks is crucial for safety and environmental monitoring. Methane is a potent greenhouse gas, and its leakage from pipelines, storage facilities, and other infrastructure can significantly contribute to global warming. The mobile nature of this system allows for efficient and comprehensive monitoring of large areas, making it an invaluable tool for the energy sector.
Moreover, the system’s ability to detect and quantify water vapor could also be beneficial. Water content in natural gas can cause hydrate formation, leading to operational issues and potential safety hazards. Real-time monitoring of water vapor levels can help prevent such issues and ensure the smooth operation of energy infrastructure.
In conclusion, the researchers have developed a robust and mobile system for outdoor trace gas detection that holds significant promise for the energy industry. By enabling precise and real-time monitoring of methane and water vapor, this technology can contribute to improved safety, environmental protection, and operational efficiency.
This article is based on research available at arXiv.