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Articles de revues sur le sujet « Methane detection »

Auteur : Grafiati

Publié le 2 juin 2025

Mis à jour le 31 juillet 2025

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1

Ouerghi, E., T. Ehret, C. de Franchis, et al. "DETECTION OF METHANE PLUMES IN HYPERSPECTRAL IMAGES FROM SENTINEL-5P BY COUPLING ANOMALY DETECTION AND PATTERN RECOGNITION." ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences V-3-2021 (June 17, 2021): 81–87. http://dx.doi.org/10.5194/isprs-annals-v-3-2021-81-2021.

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Abstract. Reducing methane emissions is essential to tackle climate change. Here, we address the problem of detecting large methane leaks using hyperspectral data from the Sentinel-5P satellite. For that we exploit the fine spectral sampling of Sentinel-5P data to detect methane absorption features visible in the shortwave infrared wavelength range (SWIR). Our method involves three separate steps: i) background subtraction, ii) detection of local maxima in the negative logarithmic spectrum of each pixel and iii) anomaly detection in the background-free image. In the first step, we remove the i

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Zhao, Shutao, Yuzhong Zhang, Shuang Zhao, Xinlu Wang, and Daniel J. Varon. "A data-efficient deep transfer learning framework for methane super-emitter detection in oil and gas fields using the Sentinel-2 satellite." Atmospheric Chemistry and Physics 25, no. 7 (2025): 4035–52. https://doi.org/10.5194/acp-25-4035-2025.

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Abstract. Efficiently detecting large methane point sources (super-emitters) in oil and gas fields is crucial for informing stakeholder decisions about mitigation actions. Satellite measurements by multispectral instruments, such as Sentinel-2, offer global and frequent coverage. However, methane signals retrieved from satellite multispectral images are prone to surface and atmospheric artifacts that vary spatially and temporally, making it challenging to build a detection algorithm that applies everywhere. Hence, laborious manual inspection is often necessary, hindering widespread deployment

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Zhang, Xu Hui. "Maintenance-Free Technologies on Digital Methane Detection System." Key Engineering Materials 474-476 (April 2011): 1813–18. http://dx.doi.org/10.4028/www.scientific.net/kem.474-476.1813.

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Methane monitoring and alarm system is very important because it guarantees the coal mine production safety. After analyzing impact factors on methane monitoring, this paper established a mathematical model of gas detection system and introduced the key technologies for maintenance-free is dynamic adjusting of system state, auto-zero, auto calibrations of nonlinear and post-processing of the data. The hardware architecture of the mini intelligent methane sensor based WSN (Wireless Sensor Network) and the automatic and visualized calibration technologies of intelligent methane detecting system

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Wu, Xiao Nan, Mei Lin Hu, Bo Jun Shang, and Yan Xian. "New City Gas Leak Detection Method and its Application." Applied Mechanics and Materials 204-208 (October 2012): 4245–49. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.4245.

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In city gas leak detection, common methane detector is vulnerable to gases such as CO, CO2,H 2O and actual conditions of interference (such as humidity, coverings and wind direction), causing false detections and failure judgment. we put the optimization of optical methane detector with infrared absorption principle to replace the traditional combustible gas detector. In order to improve accuracy and efficiency of the gas leak detection, we put forward vehicle-mounted OMDTM optical methane detectors and complementary methane portable RMLDTM laser distance measuring instrument using a new metho

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Kwaśny, Mirosław, and Aneta Bombalska. "Optical Methods of Methane Detection." Sensors 23, no. 5 (2023): 2834. http://dx.doi.org/10.3390/s23052834.

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Methane is the most frequently analyzed gas with different concentrations ranging from single ppm or ppb to 100%. There are a wide range of applications for gas sensors including urban uses, industrial uses, rural measurements, and environment monitoring. The most important applications include the measurement of anthropogenic greenhouse gases in the atmosphere and methane leak detection. In this review, we discuss common optical methods used for detecting methane such as non-dispersive infrared (NIR) technology, direct tunable diode spectroscopy (TDLS), cavity ring-down spectroscopy (CRDS), c

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Schmitt, Katrin, Mara Sendelbach, Christian Weber, Jürgen Wöllenstein, and Thomas Strahl. "Resonant photoacoustic cells for laser-based methane detection." Journal of Sensors and Sensor Systems 12, no. 1 (2023): 37–44. http://dx.doi.org/10.5194/jsss-12-37-2023.

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Abstract. Against the background of the steady increase in greenhouse gases in the atmosphere, a fast and inexpensive method for detecting methane is required. This applies to the direct measurement of the background concentration of methane in the atmosphere and also to the detection of leaks in natural gas pipelines. Photoacoustic (PA) sensors offer the possibility of highly sensitive gas detection and cost-effective design at the same time. In this work, we investigated a photoacoustic sensor for methane in low concentrations, focusing on a special cell design, the so-called T-cell. Differe

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Zhu, Shouzheng, Shijie Liu, Guoliang Tang, et al. "Single-photon laser methane detection methodology and initial validation." Chinese Optics Letters 22, no. 10 (2024): 100101. http://dx.doi.org/10.3788/col202422.100101.

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Ouerghi, E., T. Ehret, C. de Franchis, et al. "AUTOMATIC METHANE PLUMES DETECTION IN TIME SERIES OF SENTINEL-5P L1B IMAGES." ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences V-3-2022 (May 17, 2022): 147–54. http://dx.doi.org/10.5194/isprs-annals-v-3-2022-147-2022.

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Abstract. Reducing methane emissions is essential to tackle climate change. Here, we address the problem of detecting automatically large methane leaks using hyperspectral data from the Level 1B product of the Sentinel-5P satellite. To do this, two features of TROPOMI (TROPOspheric Monitoring Instrument), the Sentinel-5P satellite sensor, are exploited. The first one is the fine spectral sampling of the data which allows to isolate features of the methane absorption spectrum in the shortwave infrared wavelength range (SWIR). The second one is the daily coverage of the whole Earth which allows

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Khandaker, Sayma, Md Mahmudul Hasan, Nurulain Shaipuzaman, Mohd Amir Shahlan Mohd Aspar, and Hadi Manap. "Development of DOAS System for Hazardous Methane Detection in the Near-Infrared Region." EMITTER International Journal of Engineering Technology 12, no. 2 (2024): 182–95. https://doi.org/10.24003/emitter.v12i2.890.

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Methane (CH4) is a powerful greenhouse gas that greatly contributes to global warming. It is also very combustible, which means it has a large danger of causing explosions. It is crucial to tackle methane emissions, especially those arising from oil and gas extraction processes like transit pipes. An area of great potential is the advancement of dependable sensors for the detection and reduction of methane leaks, with the aim of averting dangerous consequences. An open-path differential optical absorption spectroscopy (DOAS) system was described in this paper for the purpose of detecting CH4 g

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Wu, Tao, Jiankang Cheng, Shifang Wang, et al. "Hotspot Detection and Estimation of Methane Emissions from Landfill Final Cover." Atmosphere 14, no. 11 (2023): 1598. http://dx.doi.org/10.3390/atmos14111598.

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The main objectives of this study were to identify methane hotspots through spatial distribution tests of the surface methane concentration above a landfill final cover and to investigate the effects of rainfall, atmospheric pressure, ground temperature, and ambient methane concentration on methane emissions. A portable laser methane detector was used to measure the spatial distribution of methane concentrations. The methane concentration distribution showed a distinct spatial variability. The maximum methane concentration reached 3225 ppm, while 73.0% of the methane concentration values were

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Ma, Li, Xu Liu, and Ganshang Si. "A Non-Source Optical Fiber Sensor for Multi-Point Methane Detection." Sensors 24, no. 15 (2024): 5031. http://dx.doi.org/10.3390/s24155031.

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Fast, accurate, real-time measurement of gas concentration is an important task for preventing coal mining disasters. In order to develop an accurate monitoring method for methane gas concentration at different locations in a mine environment, a non-source optical fiber sensor for multi-point methane detection has been developed in this paper. A 16-channel fiber splitter and a multi-channel time-sharing acquisition module are employed within the sensor, enabling simultaneous detection of methane gas at 16 points by a host. Furthermore, the methane sensors are connected to the monitoring host v

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Li, Chaofeng, Qingge Ji, Xianshu Fu, et al. "Low-Cost Detection of Methane Gas in Rice Cultivation by Gas Chromatography-Flame Ionization Detector Based on Manual Injection and Split Pattern." Molecules 27, no. 13 (2022): 3968. http://dx.doi.org/10.3390/molecules27133968.

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Rice cultivation is one of the most significant human-created sources of methane gas. How to accurately measure the methane concentration produced by rice cultivation has become a major problem. The price of the automatic gas sampler used as a national standard for methane detection (HJ 38-2017) is higher than that of gas chromatography, which greatly increases the difficulty of methane detection in the laboratory. This study established a novel methane detection method based on manual injection and split pattern by changing the parameters of the national standard method without adding any add

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Carpenter, Chris. "Review Spotlights Methane Detection, Quantification Technologies." Journal of Petroleum Technology 75, no. 04 (2023): 58–61. http://dx.doi.org/10.2118/0423-0058-jpt.

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_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 205166, “Deployment of Methane Detection and Quantification Technologies,” by Noor A.A. Talip, Mohd H.M. Pikri, and Shahrul A.Z. Abidin, Petronas, et al. The paper has not been peer reviewed. _ In supporting the energy transition, a need exists to improve accurate quantification and reduction of methane emissions and determine long-term reduction targets to drive the competitive advantages of natural gas as a low-carbon fuel. The complete paper reviews an initiative taken to measure baseline data

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Islam, Tajul, Ruben Michael Ceballos, and Lise Øvreås. "Detection of Thermoacidophiles from Yellowstone Hot Spring." Bangladesh Journal of Microbiology 40, no. 2 (2024): 86–94. http://dx.doi.org/10.3329/bjm.v40i2.73798.

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Aerobic methanotrophic bacteria maintain an unrivalled capability of utilizing methane as their sole carbon and energy source and have been retrieved from various environments. Phylogenetically, true aerobic thermoacidophilic methane oxidizers capable of growing below pH 3 have hitherto been associated only with the phylum Verrucomicrobia. In this report, the initial detection of a moderately thermoacidophilic Methylococcus-like Type Ib methanotroph of the class Gammaproteobacteria from an acidic thermal spring (50oC and pH 2.8) in the Yellowstone National Park, USA is presented. The isolate,

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Kumar Sinha, Gaurav. "Sensor Data Analytics for Optimized Methane Leak Detection and Mitigation." International Journal of Science and Research (IJSR) 13, no. 4 (2024): 223–31. http://dx.doi.org/10.21275/sr24330010938.

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Sauter, E. J., A. Boetius, M. Schlüter, E. Damm, and M. Klages. "Acoustic Detection of Methane Plumes." Energy Exploration & Exploitation 21, no. 4 (2003): 299–301. http://dx.doi.org/10.1260/014459803773646896.

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Zhang, Haiqing. "Research on low power consumption of wireless MEMS methane sensor." Journal of Physics: Conference Series 2724, no. 1 (2024): 012042. http://dx.doi.org/10.1088/1742-6596/2724/1/012042.

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Abstract Aiming at the problem that the high power consumption of traditional methane sensors does not realize the comprehensive detection of coal mines underground, based on MEMS methane detection technology, wireless methane sensing low-power research is proposed. First of all, based on the analysis of power correlation, we select the modularized design with low power, which includes power supply, sensing element driver, acquisition, and processing modules. We study the change of sensitive resistance, response time, and power consumption of the MEMS methane sensing element and sensor in diff

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Miao, Cheng-xing, Qing Li, and Sheng-yao Jia. "Real Time In-situ Detection System Research for Methane in Offshore Shallow Gas based on Thin Film Interface." MATEC Web of Conferences 232 (2018): 04053. http://dx.doi.org/10.1051/matecconf/201823204053.

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In order to get ridded of the non real-time detection methods of artificial site sampled and laboratory instrument analyzed in the field of methane detection in the offshore shallow gas, real-time in-situ detection system for methane in offshore shallow gas was designed by the film interface.The methane in the offshore shallow gas through the gas-liquid separation membrane of polymer permeation into the system internal detection probe, analog infrared micro gas sensor sensed the methane concentration and the corresponded output value, data acquisition and communication node fitted into standar

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Schuit, Berend J., Joannes D. Maasakkers, Pieter Bijl, et al. "Automated detection and monitoring of methane super-emitters using satellite data." Atmospheric Chemistry and Physics 23, no. 16 (2023): 9071–98. http://dx.doi.org/10.5194/acp-23-9071-2023.

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Abstract. A reduction in anthropogenic methane emissions is vital to limit near-term global warming. A small number of so-called super-emitters is responsible for a disproportionally large fraction of total methane emissions. Since late 2017, the TROPOspheric Monitoring Instrument (TROPOMI) has been in orbit, providing daily global coverage of methane mixing ratios at a resolution of up to 7×5.5 km2, enabling the detection of these super-emitters. However, TROPOMI produces millions of observations each day, which together with the complexity of the methane data, makes manual inspection infeasi

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Krauklit, G., and K. Aghayeva. "METHANE DETECTION BASED ON SENTINEL-2 MULTISPECTRAL IMAGERY." Sciences of Europe, no. 110 (February 7, 2023): 77–81. https://doi.org/10.5281/zenodo.7618453.

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Methane is a powerful greenhouse gas that lacks both odour and colour and has a significant impact on climate change. Methane's contribution to global warming is about 25% of all warming observed since pre-industrial times. Anthropogenic methane emissions come from many different sources, mostly related to agricultural activities, coal mining, oil and gas extraction, and waste treatment. Studies in this area have shown that some of these sources emit significant amounts of methane due to equipment failures or abnormal operating conditions. This article describes how the use of the Sentinel

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Wang, Hongzhou, Xiangtao Fan, Hongdeng Jian, and Fuli Yan. "Exploiting the Matched Filter to Improve the Detection of Methane Plumes with Sentinel-2 Data." Remote Sensing 16, no. 6 (2024): 1023. http://dx.doi.org/10.3390/rs16061023.

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Existing research indicates that detecting near-surface methane point sources using Sentinel-2 satellite imagery can offer crucial data support for mitigating climate change. However, current retrieval methods necessitate the identification of reference images unaffected by methane, which presents certain limitations. This study introduces the use of a matched filter, developing a novel methane detection algorithm for Sentinel-2 imagery. Compared to existing algorithms, this algorithm does not require selecting methane-free images from historical imagery in methane-sensitive bands, but estimat

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Bezdek, Máté J., Shao-Xiong Lennon Luo, Kang Hee Ku, and Timothy M. Swager. "A chemiresistive methane sensor." Proceedings of the National Academy of Sciences 118, no. 2 (2020): e2022515118. http://dx.doi.org/10.1073/pnas.2022515118.

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A chemiresistive sensor is described for the detection of methane (CH4), a potent greenhouse gas that also poses an explosion hazard in air. The chemiresistor allows for the low-power, low-cost, and distributed sensing of CH4 at room temperature in air with environmental implications for gas leak detection in homes, production facilities, and pipelines. Specifically, the chemiresistors are based on single-walled carbon nanotubes (SWCNTs) noncovalently functionalized with poly(4-vinylpyridine) (P4VP) that enables the incorporation of a platinum-polyoxometalate (Pt-POM) CH4 oxidation precatalyst

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Wang, Boqiang, Xuezeng Zhao, Yiyong Zhang, and Zhuogang Wang. "Research on High Performance Methane Gas Concentration Sensor Based on Pyramid Beam Splitter Matrix." Sensors 24, no. 2 (2024): 602. http://dx.doi.org/10.3390/s24020602.

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Methane gas concentration detection faces the challenges of increasing accuracy and sensitivity, as well as high reliability in harsh environments. The special design of the optical path structure of the sensitive element provides an opportunity to improve methane gas concentration detection. In this study, the optical path structure of the sensitive element was newly designed based on the Pyramidal beam splitter matrix. The infrared light source was modulated by multi-frequency point-signal superimposed modulation technology. At the same time, concentration detection results and confidence le

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Krupanek, Beata. "Dynamic Error Correction of Methane Sensor." International Journal of Electronics and Telecommunications 60, no. 4 (2014): 287–89. http://dx.doi.org/10.2478/eletel-2014-0037.

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Abstract Coal mine methane is a term given to the methane gas produced or emitted in association with coal mining activities either from the coal seam itself or from other gassy formations underground. The primary reason for measuring methane is to improve the safety of the mines. In recent years, there have been many fatalities in underground coal mine explosions in which methane was a contributing factor. The rapid detection of methane is very important from the point of view of safety of mine workers. This paper presents a concept of fast methane detection by reconstituting its concentratio

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Zhang, Zhan, Evan D. Sherwin, Daniel J. Varon, and Adam R. Brandt. "Detecting and quantifying methane emissions from oil and gas production: algorithm development with ground-truth calibration based on Sentinel-2 satellite imagery." Atmospheric Measurement Techniques 15, no. 23 (2022): 7155–69. http://dx.doi.org/10.5194/amt-15-7155-2022.

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Abstract. Sentinel-2 satellite imagery has been shown by studies to be capable of detecting and quantifying methane emissions from oil and gas production. However, current methods lack performance calibration with ground-truth testing. This study developed a multi-band–multi-pass–multi-comparison-date methane retrieval algorithm that enhances Sentinel-2 sensitivity to methane plumes. The method was calibrated using data from a large-scale controlled-release test in Ehrenberg, Arizona, in fall 2021, with three algorithm parameters tuned based on the true emission rates. Tuned parameters are the

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U., J. Ekah, Ozuomba Simeon, and Ekott Etinamabasiyaka. "Evaluating MQ Sensors in Gas Leakage Detection Systems." Journal of Scientific and Engineering Research 11, no. 9 (2024): 12–16. https://doi.org/10.5281/zenodo.13837242.

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<strong>Gas leakage detection systems are crucial for ensuring safety and preventing accidents in both domestic and industrial environments. The effectiveness of these systems largely depend on the performance of the gas sensors used, which are responsible for detecting gas concentrations. This review evaluates the various MQ sensors employed in gas leakage detection systems, focusing on their capabilities, limitations, and applications. The survey shows that while MQ2 and MQ5 sensors are versatile for domestic environments, MQ4 and MQ6 sensors are more specialized for methane and LPG detectio

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Yang, Fuling, Sicheng Zong, Xinghan Li, et al. "Optical Fiber Methane Sensor Based on Mach–Zehnder Interferometer Induced by Multimode Interference." Micromachines 16, no. 4 (2025): 406. https://doi.org/10.3390/mi16040406.

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In this paper, based on the multimode interference structure fiber and the sensitive advantages of a zeolitic imidazolate framework-8/Polydimethylsiloxane (ZIF-8/PDMS)-sensitive film in methane detection, a methane sensor based on an interferometer induced by multimode interference is designed and built with the aid of modeling. The methane-sensitive single mode fiber (MS-SMF) is obtained by coating a ZIF-8/PDMS-sensitive film around the cladding of a thin-diameter SMF. The change in methane concentration leads to a change in the cladding mode of the MS-SMF, which causes a change in interferen

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Schmidt, Mark, Peter Linke, and Daniel Esser. "Recent Development in IR Sensor Technology for Monitoring Subsea Methane Discharge." Marine Technology Society Journal 47, no. 3 (2013): 27–36. http://dx.doi.org/10.4031/mtsj.47.3.8.

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AbstractRecently developed methane sensors, based on infrared (IR) absorption technology, were successfully utilized for subsea methane release measurements. Long-term investigation of methane emissions (fluid flux determination) from natural methane seeps in the Hikurangi Margin offshore New Zealand were performed by using seafloor lander technology. Small centimeter-sized seep areas could be sampled at the seafloor by video-guided lander deployment. In situ sensor measurements of dissolved methane in seawater could be correlated with methane concentrations measured in discrete water samples

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Webber, Cody M., and John P. Kerekes. "An examination of enhanced atmospheric methane detection methods for predicting performance of a novel multiband uncooled radiometer imager." Atmospheric Measurement Techniques 13, no. 10 (2020): 5359–67. http://dx.doi.org/10.5194/amt-13-5359-2020.

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Abstract. To evaluate the potential for a new uncooled infrared radiometer imager to detect enhanced atmospheric levels of methane, three different analysis methods were examined. A single-pixel brightness temperature to noise-equivalent delta temperature (NEdT) comparison study performed using data simulated from MODTRAN6 revealed that a single thermal band centered on the 7.68 µm methane feature leads to a detectable brightness temperature difference exceeding the sensor noise level for a plume of about 17 ppm at ambient atmospheric temperature compared to an ambient plume with no enhanced m

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Abadi, Shima, Tor A. Bjorklund, Junzhe Liu, and H. P. Johnson. "Detection and monitoring of seafloor methane bubbles using hydrophones." Journal of the Acoustical Society of America 152, no. 4 (2022): A290. http://dx.doi.org/10.1121/10.0016312.

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Natural marine seeps of methane are important sources of greenhouse gas emissions that enter the global environment. Monitoring marine methane seeps will reveal important information about how they form, their source regions, and how much of the inventory is microbially consumed within the water column before the gas is released to the atmosphere. While active acoustics methods have been extensively used to detect and monitor methane emissions from the seafloor, there are only a few studies showing the use of passive acoustics for bubble sound detection and monitoring. In this presentation, we

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Wang, Shu Tao, Peng Wei Zhang, and Quan Min Zhu. "Novel Fiber-Optic Sensing System for Detection of Methane." Key Engineering Materials 562-565 (July 2013): 1008–15. http://dx.doi.org/10.4028/www.scientific.net/kem.562-565.1008.

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Based on DFBLD (Distributed Feedback Laser Diode) and harmonic detection technique, a novel fiber-optic methane detection system is constructed. The system can be applied to broad-range concentration detection of methane. Based on the approximation express of the law of Beer-Lambert, detection of methane with various concentration from 0% to 20% is completed using subtraction of background and ratio processing method, as the atmosphere surroundings are treated as background noise. The direct absorption spectra for various concentration is measured using GRIN gas cell, combined with DFBLD. The

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Murphy, Matthew M., Thomas G. Beatty, Luis Welbanks, and Guangwei Fu. "HST Transmission Spectra of the Hot Neptune HD 219666 b: Detection of Water and the Challenge of Constraining Both Water and Methane." Astronomical Journal 169, no. 6 (2025): 286. https://doi.org/10.3847/1538-3881/adc684.

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Abstract Although Neptunian-sized (2–5 R ⊕) planets appear to be extremely common in the Galaxy, many mysteries remain about their overall nature. To date, only 11 Neptunian-sized planets have had their atmospheres spectroscopically characterized, and these observations hint at interesting diversity within this class of planets. Much of our understanding of these worlds and others derive from transmission spectroscopy with the Hubble Space Telescope’s Wide Field Camera 3 (HST/WFC3). One key outcome of HST/WFC3 observations has been the consistent detection of water but no methane in Neptunian

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Cooper, Jasmin, Luke Dubey, and Adam Hawkes. "Methane detection and quantification in the upstream oil and gas sector: the role of satellites in emissions detection, reconciling and reporting." Environmental Science: Atmospheres 2, no. 1 (2022): 9–23. http://dx.doi.org/10.1039/d1ea00046b.

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Sánchez-García, Elena, Javier Gorroño, Itziar Irakulis-Loitxate, Daniel J. Varon, and Luis Guanter. "Mapping methane plumes at very high spatial resolution with the WorldView-3 satellite." Atmospheric Measurement Techniques 15, no. 6 (2022): 1657–74. http://dx.doi.org/10.5194/amt-15-1657-2022.

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Abstract. The detection of methane emissions from industrial activities can help enable effective climate change mitigation strategies. These industrial emissions, such as from oil and gas (O&amp;G) extraction and coal mining, typically occur as large plumes of highly concentrated gas. Different satellite missions have recently shown the potential to map such methane plumes from space. In this work, we report on the promising potential of the WorldView-3 (WV-3) satellite mission for methane mapping. This relies on its unique very high spatial resolution (up to 3.7 m) data in the shortwave

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Furuta, Daniel, Tofigh Sayahi, Jinsheng Li, Bruce Wilson, Albert A. Presto, and Jiayu Li. "Characterization of inexpensive metal oxide sensor performance for trace methane detection." Atmospheric Measurement Techniques 15, no. 17 (2022): 5117–28. http://dx.doi.org/10.5194/amt-15-5117-2022.

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Abstract. Methane, a major contributor to climate change, is emitted by a variety of natural and anthropogenic sources. Commercially available lab-grade instruments for sensing trace methane are expensive, and previous efforts to develop inexpensive, field-deployable trace methane sensors have had mixed results. Industrial and commercial metal oxide (MOx) methane sensors, which are intended for leak detection and safety monitoring, can potentially be repurposed and adapted for low-concentration sensing. As an initial step towards developing a low-cost sensing system, we characterize the perfor

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Fu, Xiuhua, Guangyuan Fu, Suotao Dong, Ben Wang, Zhaowen Lin, and Yonggang Pan. "Development of Low-Stress Double-Pass Filter Device for Methane and Ethane Flammable Gas Detection System." Applied Sciences 14, no. 21 (2024): 9902. http://dx.doi.org/10.3390/app14219902.

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To meet the needs of industrial and environmental monitoring of methane and ethane flammable gases, a low-stress filter device for detecting methane and ethane simultaneously is developed based on the absorption spectra of methane and ethane and the thin-film design theory. In order to improve the sensitivity of the detection system and reduce the influence of environmental noise, the information of methane and ethane gas is extracted simultaneously by using a filter with double bandpass and wide cut-off in the middle-infrared and far-infrared bands. The transmittance of the filter is 91.3%, 9

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Eminov, R. A., and M. M. Ismaylov. "New method for detection of methane escape from the main pipelines." Azerbaijan Oil Industry, no. 2 (February 15, 2021): 22–25. http://dx.doi.org/10.37474/0365-8554/2021-2-22-25.

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Total methane content in the atmosphere has increased for two times during last two hundred years. Since 1900s, the annual rate of growth for methane dramatically increased. The sources of methane emissions to the air are their storage reservoirs, different oil-gas refineries, main pipelines and their transport facilities as well. A new method for detection of methane escape from the main pipelines has been developed and the order of its realization shown. Mathematic algorithm of the method is presented and the calculation formula for optical thickness of methane over the track obtained. Obtai

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Weng, Longhang, Han Wang, and Qiaoyun Yang. "Fiber Laser Methane Detection Device based on TDLAS and Its Application." Journal of Physics: Conference Series 2464, no. 1 (2023): 012013. http://dx.doi.org/10.1088/1742-6596/2464/1/012013.

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Abstract Methane is a flammable and explosive gas, which is the main component of natural gas, mashgas, and biogas. Using the technology of tunable diode laser absorption spectroscopy (TDLAS) to detect methane, which does not require oxygen, no poisoning, no calibrating, has gas selectivity, strong environmental adaptability, and is stable and reliable. The laser transmission with the optical fiber has the characteristics of low optical loss, long distance and flexible networking. This manuscript demonstrated an optical fiber laser methane detection device based on TDLAS and its application. T

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Hornbach, Matthew J., W. Steven Holbrook, Andrew R. Gorman, Kara L. Hackwith, Daniel Lizarralde, and Ingo Pecher. "Direct seismic detection of methane hydrate on the Blake Ridge." GEOPHYSICS 68, no. 1 (2003): 92–100. http://dx.doi.org/10.1190/1.1543196.

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Seismic detection of methane hydrate often relies on indirect or equivocal methods. New multichannel seismic reflection data from the Blake Ridge, located approximately 450 km east of Savannah, Georgia, show three direct seismic indicators of methane hydrate: (1) a paleo bottom‐simulating reflector (BSR) formed when methane gas froze into methane hydrate on the eroding eastern flank of the Blake Ridge, (2) a lens of reduced amplitudes and high P‐wave velocities found between the paleo‐BSR and BSR, and (3) bright spots within the hydrate stability zone that represent discrete layers of concentr

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Holbrook, W. S., A. R. Gorman, M. Hornbach, et al. "Seismic detection of marine methane hydrate." Leading Edge 21, no. 7 (2002): 686–89. http://dx.doi.org/10.1190/1.1497325.

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Kang, H. D., and V. Dose. "Radical detection in a methane plasma." Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 21, no. 6 (2003): 1978–80. http://dx.doi.org/10.1116/1.1621405.

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Young, Leslie A., J. L. Elliot, Alan Tokunaga, Catherine de Bergh, and Tobias Owen. "Detection of Gaseous Methane on Pluto." Icarus 127, no. 1 (1997): 258–62. http://dx.doi.org/10.1006/icar.1997.5709.

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Okita, Noriko, Toshihiro Hoaki, Shinya Suzuki, and Masashi Hatamoto. "Characteristics of aerobic methane-oxidising bacterial community at the sea-floor surface of the Nankai Trough." Marine and Freshwater Research 71, no. 10 (2020): 1252. http://dx.doi.org/10.1071/mf19317.

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Methane hydrate is one of the new energy sources, but methane leakage could cause environmental issues such as marine ecosystem changes and global warming. The methane-oxidising bacterial (MOB) community could reflect the methane concentration, thus it may be an indicator of methane leakage. We obtained two sea-floor surface samples from a methane seep area and 12 samples from other general sea-floor areas of the Nankai Trough for the detection and phylogenetic analysis of the particulate methane monooxygenase (pmoA) gene. Using quantitative polymerase chain reaction analysis, the methane seep

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Dyakowska, Eliza, and Adam Przybył. "Metody wykrywania i pomiaru wielkości niezorganizowanej emisji metanu z elementów infrastruktury przesyłowej – wyniki projektu GERG Detection and Measurement of Fugitive Emissions of Natural Gas from the Transmission Systems." Nafta-Gaz 77, no. 2 (2021): 118–26. http://dx.doi.org/10.18668/ng.2021.02.06.

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The article presents the results of the project carried out by GAZ-SYSTEM in cooperation with 5 other European gas Transmission System Operators (TSO) – ENAGAS, Fluxys, Gasunie, Snam and GRTgaz. The objective of the project was to investigate and identify the most useful devices for detecting and measuring methane emissions from infrastructure components typical for the TSO. The market analysis showed that methane detectors utilizing different principles of operation are available, but there are much fewer devices for measuring emission rates. 5 devices were selected for tests: 3 exclusively f

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Sarat, M., M. Ramakrishna, Y. Suresh, et al. "Low-level Determination of Residual Methyl Methane Sulfonate and Ethyl Methane Sulfonate in Pharmaceuticals by Gas Chromatography with Mass Spectrometry." E-Journal of Chemistry 7, no. 2 (2010): 629–35. http://dx.doi.org/10.1155/2010/460185.

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A capillary gas chromatographic method using mass spectrometric detection was developed and validated for the trace analysis (ppm level) of methyl methane sulfonate and ethyl methane sulfonate in pharmaceutical drug substances. The method utilizes a capillary column (DB-624) with 6% cyanopropyl phenyl and 94% dimethyl polysiloxane stationary phase. A dissolve-and-injection approach was adopted for sample introduction in a split less mode. Mixture of (80:20) ratio of methanol and chloroform was used as a diluent or sample solvent. A limit of detection of about 0.17 μg/g (0.17 ppm) for methyl me

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Земский, Геннадий Тимофеевич, Александр Валерьевич Ильичев, Наталья Валентиновна Кондратюк, and Дмитрий Вадимович Долгих. "OVERVIEW OF GAS ANALYZERS FOR METHANE." Актуальные вопросы пожарной безопасности, no. 4(10) (December 8, 2021): 14–27. http://dx.doi.org/10.37657/vniipo.avpb.2021.35.86.003.

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Разгерметизация газоиспользующего оборудования может привести к взрыву газовоздушной смеси или пожару. Для своевременного обнаружения утечки газа используются газоанализаторы. Настоящая статья содержит обзор газоанализаторов, отличающихся по конструктивному исполнению, функциональному назначению, по принципу действия чувствительных элементов (сенсоров). Отмечено, что для обнаружения утечек метана (в том числе природного газа) наиболее эффективными с точки зрения чувствительности и быстродействия являются датчики (сенсоры), основанные на принципах: термического катализа (ТКД), поглощения инфрак

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Fan, Yingrun, Jinlong Xiao, Zhengzheng Shen, et al. "1.65 µm square-FP coupled cavity semiconductor laser for methane gas detection." Chinese Optics Letters 20, no. 6 (2022): 061401. http://dx.doi.org/10.3788/col202220.061401.

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Wang, Zhifang, Shutao Wang, Deming Kong, and Shiyu Liu. "Methane Detection Based on Improved Chicken Algorithm Optimization Support Vector Machine." Applied Sciences 9, no. 9 (2019): 1761. http://dx.doi.org/10.3390/app9091761.

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Methane, known as a flammable and explosion hazard gas, is the main component of marsh gas, firedamp, and rock gas. Therefore, it is important to be able to detect methane concentration safely and effectively. At present, many models have been proposed to enhance the performance of methane predictions. However, the traditional models displayed inevitable shortcomings in parameter optimization in our experiment, which resulted in their having poor prediction performance. Accordingly, the improved chicken swarm algorithm optimized support vector machine (ICSO-SVM) was proposed to predict the con

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Gargiulo, Grazia. "Detection of methane fugitive emissions using drones." APPEA Journal 61, no. 2 (2021): 400. http://dx.doi.org/10.1071/aj20088.

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Detecting methane fugitive emissions from infrastructures is an important task for the oil and gas industry safety and asset management. The current methodology relies on driving surveys using vehicles equipped with different sensors. However, this approach has limitations due to the technical characteristics of the commercially available methane detectors and the specific difficulty for a vehicle to safely and reliably cover certain terrains. Additionally, for an extended asset network like pipelines, the gathering of data relies on long distance driving and sometimes in remote areas. Terra S

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Sun, Jiaying, Zhuoru Huang, Xiaojing Zhang, et al. "Laser-Induced Graphene-Based Gas Sensor with PEDOT:PSS/Gold–Platinum Nanocomposites for Highly Sensitive Detection of Methane." Chemosensors 13, no. 1 (2024): 3. https://doi.org/10.3390/chemosensors13010003.

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Methane is a common intestinal gas that has been linked to a variety of gastrointestinal disorders. In this study, we prepared a LIG-based electrochemical sensor modified with PEDOT:PSS/Au-Pt nanocomposites for high-sensitivity methane detection. LIG’s high porosity, flexibility, and excellent electrical conductivity are beneficial for electrochemical detection. The PEDOT:PSS film is electrodeposited on the electrode surface to amplify the signal further. The synergistic effect of bimetallic nanocomposites can improve the electrochemical catalytic activity and increase the specific surface are

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