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Journal articles on the topic 'CO2 and CH4 Leak detection'

Author: Grafiati

Published: 9 November 2024

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1

Dherbecourt, Jean-Baptiste, Jean-Michel Melkonian, Antoine Godard, et al. "NAOMI GAZL: A Multispecies DIAL Tested on the TADI Gas Leak Simulation Facility." EPJ Web of Conferences 237 (2020): 03016. http://dx.doi.org/10.1051/epjconf/202023703016.

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We report on a direct detection differential absorption lidar (DIAL), designed for remote detection of CH4 and CO2. The system is based on a single-frequency optical parametric oscillator/amplifier system, tunable in the 1.57-1.65 µm range. The DIAL system, called NAOMI GAZL, was tested on a controlled gas release facility in October 2018.

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2

Kuze, Akihiko, Nobuhiro Kikuchi, Fumie Kataoka, Hiroshi Suto, Kei Shiomi, and Yutaka Kondo. "Detection of Methane Emission from a Local Source Using GOSAT Target Observations." Remote Sensing 12, no. 2 (2020): 267. http://dx.doi.org/10.3390/rs12020267.

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Emissions of atmospheric methane (CH4), which greatly contributes to radiative forcing, have larger uncertainties than those for carbon dioxide (CO2). The Thermal And Near-infrared Sensor for carbon Observation Fourier-Transform Spectrometer (TANSO-FTS) onboard the Greenhouse gases Observing SATellite (GOSAT) launched in 2009 has demonstrated global grid observations of the total column density of CO2 and CH4 from space, and thus reduced uncertainty in the global flux estimation. In this paper, we present a case study on local CH4 emission detection from a single-point source using an availabl

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Russ, Tamara, Joseph R. Stetter, Eric Luong, Avadhkumar Jitubhai Patel, and Winncy Du. "(Invited) Detection, Location and Quantification of H₂ Gas Leaks Based on Data Collected with Electrochemical Sensors in a Specifically Designed Test Chamber." ECS Meeting Abstracts MA2024-01, no. 51 (2024): 2756. http://dx.doi.org/10.1149/ma2024-01512756mtgabs.

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Hydrogen is one of the most important energy gases as it is carbon free and therefore can result in the emission reduction of the greenhouse gas CO2. However, hydrogen itself is a secondary greenhouse gas. As a secondary greenhouse gas, hydrogen does not directly add to global warming by entrapping heat. Instead, it reacts with molecules in the atmosphere that are needed to remove the greenhouse gas CH4. CH4 is comparably short-lived in the atmosphere with approximately 10 years compared to CO2 which can last in the atmosphere for centuries. However, CH4 traps at least 100 times as much heat a

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4

Yang, Mingxi, John Prytherch, Elena Kozlova, Margaret J. Yelland, Deepulal Parenkat Mony, and Thomas G. Bell. "Comparison of two closed-path cavity-based spectrometers for measuring air–water CO<sub>2</sub> and CH<sub>4</sub> fluxes by eddy covariance." Atmospheric Measurement Techniques 9, no. 11 (2016): 5509–22. http://dx.doi.org/10.5194/amt-9-5509-2016.

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Abstract. In recent years several commercialised closed-path cavity-based spectroscopic instruments designed for eddy covariance flux measurements of carbon dioxide (CO2), methane (CH4), and water vapour (H2O) have become available. Here we compare the performance of two leading models – the Picarro G2311-f and the Los Gatos Research (LGR) Fast Greenhouse Gas Analyzer (FGGA) at a coastal site. Both instruments can compute dry mixing ratios of CO2 and CH4 based on concurrently measured H2O, temperature, and pressure. Additionally, we used a high throughput Nafion dryer to physically remove H2O

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Halley, Sleight, Kannan Ramaiyan, James Smith, et al. "Mixed Potential Electrochemical Sensors for Natural Gas Leak Detection – Field Testing of Portable Sensor Package." ECS Meeting Abstracts MA2023-01, no. 52 (2023): 2604. http://dx.doi.org/10.1149/ma2023-01522604mtgabs.

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According to the EPA, methane (CH4) emissions from oil and gas infrastructure accounted for 211 million metric tons of CO2 equivalent in 2020 [1]. Actual emissions may exceed this by a factor of three [2]. Current natural gas leak detection technologies largely consist of optical sensors such as IR spectrometers [3]. Optical sensors have high sensitivity, but the high cost and fragility of these sensors limit practical applications and continuous monitoring in the field. Mixed potential electrochemical sensors (MPES) are low cost, robust, selective and sensitive, making them a viable option fo

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Zellweger, Christoph, Lukas Emmenegger, Mohd Firdaus, et al. "Assessment of recent advances in measurement techniques for atmospheric carbon dioxide and methane observations." Atmospheric Measurement Techniques 9, no. 9 (2016): 4737–57. http://dx.doi.org/10.5194/amt-9-4737-2016.

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Abstract. Until recently, atmospheric carbon dioxide (CO2) and methane (CH4) measurements were made almost exclusively using nondispersive infrared (NDIR) absorption and gas chromatography with flame ionisation detection (GC/FID) techniques, respectively. Recently, commercially available instruments based on spectroscopic techniques such as cavity ring-down spectroscopy (CRDS), off-axis integrated cavity output spectroscopy (OA-ICOS) and Fourier transform infrared (FTIR) spectroscopy have become more widely available and affordable. This resulted in a widespread use of these techniques at many

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7

Zaini, Zaini, and Taffany Hudalil Alvy. "Design of Monitoring System for Hazardous Gas and Fire Detection In Building Based On Internet of Things." Andalas Journal of Electrical and Electronic Engineering Technology 2, no. 1 (2022): 13–20. http://dx.doi.org/10.25077/ajeeet.v2i1.20.

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Fires and gas leaks are events that still occur frequently. This incident is usually caused by various factors including leakage of LPG gas cylinders, cigarette butts that are disposed of carelessly, short circuits of electric current and so on. Generally, fires and gas leaks can only be detected if the fire has already grown or a lot of smoke comes out of the building. Therefore, a monitoring system for detecting dangerous gases and fires in buildings based on the Internet of Things was created that can monitor the condition of the building through a website as well as send notifications to t

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8

Dowd, Emily, Alistair J. Manning, Bryn Orth-Lashley, et al. "First validation of high-resolution satellite-derived methane emissions from an active gas leak in the UK." Atmospheric Measurement Techniques 17, no. 5 (2024): 1599–615. http://dx.doi.org/10.5194/amt-17-1599-2024.

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Abstract. Atmospheric methane (CH4) is the second-most-important anthropogenic greenhouse gas and has a 20-year global warming potential 82 times greater than carbon dioxide (CO2). Anthropogenic sources account for ∼ 60 % of global CH4 emissions, of which 20 % come from oil and gas exploration, production and distribution. High-resolution satellite-based imaging spectrometers are becoming important tools for detecting and monitoring CH4 point source emissions, aiding mitigation. However, validation of these satellite measurements, such as those from the commercial GHGSat satellite constellatio

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Bonne, Jean-Louis, Ludovic Donnat, Grégory Albora, et al. "A measurement system for CO₂ and CH₄ emissions quantification of industrial sites using a new in situ concentration sensor operated on board uncrewed aircraft vehicles." Atmospheric Measurement Techniques 17, no. 14 (2024): 4471–91. http://dx.doi.org/10.5194/amt-17-4471-2024.

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Abstract. We developed and tested a complete measurement system to quantify CO2 and CH4 emissions at the scale of an industrial site based on the innovative sensor Airborne Ultra-light Spectrometer for Environmental Application (AUSEA), operated on board uncrewed aircraft vehicles (UAVs). The AUSEA sensor is a new light-weight (1.4 kg) open-path laser absorption spectrometer simultaneously recording in situ CO2 and CH4 concentrations at high frequency (24 Hz in this study) with precisions of 10 ppb for CH4 and 1 ppm for CO2 (when averaged at 1 Hz). It is suitable for industrial operation at a

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10

Hermon, Dedi. "Impacts of land cover change on climate trend in Padang Indonesia." Indonesian Journal of Geography 46, no. 2 (2014): 138. http://dx.doi.org/10.22146/ijg.5783.

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ἀe purpose of this study was to analyze the trend of climate change through changes in the elements of Green House Gases (GHGs), includes the trend of CO2, N2O, and CH4. ἀe change of the extreme rainfall and temperature indices due to land cover change into developed area in Padang. IdentiḀcation and analysis trends of climate change and extreme climatic events were analyzed by using RclimDex the Expert Team for Climate Change Detection and Indices (ETCCDMI) technique. Where as the analysis and interpretation of land cover changes into developed area used Landsat TM 5 and Landsat 1985 7 ETM +

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Jacobs, Erik, Henry C. Bittig, Ulf Gräwe, et al. "Upwelling-induced trace gas dynamics in the Baltic Sea inferred from 8 years of autonomous measurements on a ship of opportunity." Biogeosciences 18, no. 8 (2021): 2679–709. http://dx.doi.org/10.5194/bg-18-2679-2021.

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Abstract. Autonomous measurements aboard ships of opportunity (SOOP) provide in situ data sets with high spatial and temporal coverage. In this study, we use 8 years of carbon dioxide (CO2) and methane (CH4) observations from SOOP Finnmaid to study the influence of upwelling on trace gas dynamics in the Baltic Sea. Between spring and autumn, coastal upwelling transports water masses enriched with CO2 and CH4 to the surface of the Baltic Sea. We study the seasonality, regional distribution, relaxation, and interannual variability in this process. We use reanalysed wind and modelled sea surface

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Leroux, Killian, and Lahouari Krim. "Thermal and photochemical study of CH3OH and CH3OH–O2 astrophysical ices." Monthly Notices of the Royal Astronomical Society 500, no. 1 (2020): 1188–200. http://dx.doi.org/10.1093/mnras/staa3205.

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ABSTRACT Methanol, which is one of the most abundant organic molecules in the interstellar medium, plays an important role in the complex grain surface chemistry that is believed to be a source of many organic compounds. Under energetic processing such as ultraviolet (UV) photons or cosmic rays, methanol may decompose into CH4, CO2, CO, HCO, H2CO, CH3O and CH2OH, which in turn lead to complex organic molecules such as CH3OCHO, CHOCH2OH and HOCH2CH2OH through radical recombination reactions. However, although molecular oxygen and its detection, abundance and role in the interstellar medium have

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13

Hazan, Lynn, Jérôme Tarniewicz, Michel Ramonet, Olivier Laurent, and Amara Abbaris. "Automatic processing of atmospheric CO<sub>2</sub> and CH<sub>4</sub> mole fractions at the ICOS Atmosphere Thematic Centre." Atmospheric Measurement Techniques 9, no. 9 (2016): 4719–36. http://dx.doi.org/10.5194/amt-9-4719-2016.

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Abstract. The Integrated Carbon Observation System Atmosphere Thematic Centre (ICOS ATC) automatically processes atmospheric greenhouse gases mole fractions of data coming from sites of the ICOS network. Daily transferred raw data files are automatically processed and archived. Data are stored in the ICOS atmospheric database, the backbone of the system, which has been developed with an emphasis on the traceability of the data processing. Many data products, updated daily, explore the data through different angles to support the quality control of the dataset performed by the principal operato

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Jońca, Justyna, and Izabela Sówka. "GAS SENSORS BASED ON METAL OXIDE NANOPARTICLES AND THEIR APPLICATION FOR ENVIRONMENTALLY HAZARDOUS GASES DETECTION A MINI-REVIEW." Zeszyty Naukowe SGSP 85 (March 20, 2023): 7–27. http://dx.doi.org/10.5604/01.3001.0016.3143.

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Hazardous gases have adverse effects on living organisms and the environment. They can beclassified into two categories, i.e. toxic gases (e.g. H2S, SO2, CO, NO2, NO and NH3) and greenhousegases (e.g. N2O, CH4 and CO2). Moreover, their presence in confined areas may lead to fireaccidents, cause serious health problems or even death. Therefore, monitoring of these substanceswith gas sensors allows assessing the quality of the atmosphere, helps avoiding accidents and saveslives. Metal oxide semiconductor gas sensors (MOS) are one of the most popular choices for theseapplications owing to their n

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15

Yang, Shuting, Robert Talbot, Michael Frish, et al. "Natural Gas Fugitive Leak Detection Using an Unmanned Aerial Vehicle: Measurement System Description and Mass Balance Approach." Atmosphere 9, no. 10 (2018): 383. http://dx.doi.org/10.3390/atmos9100383.

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Natural gas is an abundant resource across the United States, of which methane (CH4) is the main component. About 2% of extracted CH4 is lost through leaks. The Remote Methane Leak Detector (RMLD)-Unmanned Aerial Vehicle (UAV) system was developed to investigate natural gas fugitive leaks in this study. The system is composed of three major technologies: miniaturized RMLD (mini-RMLD) based on Backscatter Tunable Diode Laser Absorption Spectroscopy (TDLAS), an autonomous quadrotor UAV and simplified quantification and localization algorithms. With a miniaturized, downward-facing RMLD on a small

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16

Owsley-Brown, Farrer, Martin J. Wooster, Mark J. Grosvenor, and Yanan Liu. "Can the remote sensing of combustion phase improve estimates of landscape fire smoke emission rate and composition?" Atmospheric Measurement Techniques 17, no. 20 (2024): 6247–64. http://dx.doi.org/10.5194/amt-17-6247-2024.

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Abstract. The proportion of flaming and smouldering (or smoldering) activity occurring in landscape fires varies with fuel type and fuel characteristics, which themselves are influenced by ecology, meteorology, time since the last fire, etc. The proportion of these combustion phases greatly influences the rate of fuel consumption and smoke emission, along with the chemical composition of the smoke, which influences the effects on the atmosphere. Earth observation (EO) has long been suggested as a way to remotely map combustion phase, and here we provide the first known attempt at evaluating wh

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17

Lin, Yueyu, Dexter Manalili, Amir Khodabakhsh, and Simona M. Cristescu. "Real-Time Measurement of CH4 in Human Breath Using a Compact CH4/CO2 Sensor." Sensors 24, no. 4 (2024): 1077. http://dx.doi.org/10.3390/s24041077.

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The presence of an elevated amount of methane (CH4) in exhaled breath can be used as a non-invasive tool to monitor certain health conditions. A compact, inexpensive and transportable CH4 sensor is thus very interesting for this purpose. In addition, if the sensor is also able to simultaneously measure carbon dioxide (CO2), one can extract the end-tidal concentration of exhaled CH4. Here, we report on such a sensor based on a commercial detection module using tunable diode laser absorption spectroscopy. It was found that the measured CH4/CO2 values exhibit a strong interference with water vapo

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Widodo, Slamet, M. Miftakul Amin, and Adi Sutrisman. "The Design of The Monitoring Tools Of Clean Air Condition And Dangerous Gas CO, CO2 CH4 In Chemical Laboratory By Using Fuzzy Logic Based On Microcontroller." E3S Web of Conferences 31 (2018): 10008. http://dx.doi.org/10.1051/e3sconf/20183110008.

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There are many phenomena that human are exposed to toxins from certain types such as of CO2, CO2 and CH4 gases. The device used to detect large amounts of CO, CO2, and CH4 gas in air in enclosed spaces using MQ 135 gas sensors of different types based on the three sensitivity of the Gas. The results of testing the use of sensors MQ 135 on the gas content of CO, CO2 and CH4 received by the sensor is still in the form of ppm based on the maximum ppm detection range of each sensor. Active sensor detects CO 120 ppm gas, CO2 1600 ppm and CH4 1ppm "standby 1" air condition with intermediate rotary f

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19

Xia, Tian, Julia Raneses, and Stuart Batterman. "Improving the Performance of Pipeline Leak Detection Algorithms for the Mobile Monitoring of Methane Leaks." Atmosphere 13, no. 7 (2022): 1043. http://dx.doi.org/10.3390/atmos13071043.

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Methane (CH4) is the major component of natural gas, a potent greenhouse gas, and a precursor for the formation of tropospheric ozone. Sizable CH4 releases can occur during gas extraction, distribution, and use, thus, the detection and the control of leaks can help to reduce emissions. This study develops, refines, and tests algorithms for detecting CH4 peaks and estimating the background levels of CH4 using mobile monitoring, an approach that has been used to determine the location and the magnitude of pipeline leaks in a number of cities. The algorithm uses four passes of the data to provide

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South, David W. "Methane Emissions, Nowhere to Hide from Detection and Compliance Monitoring with Newly Launched Satellite." Climate and Energy 40, no. 11 (2024): 28–32. http://dx.doi.org/10.1002/gas.22407.

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Climate change is often synonymous with carbon dioxide (CO2) emissions. But there is another greenhouse gas (GHG) that is also a contributor: methane (CH4), a short‐lived but extremely potent GHG. Methane emissions behave differently than CO2 emissions when emitted into the atmosphere. The warming effects of CH4 wear off quickly compared to CO2, which remains in the atmosphere for centuries. But what it lacks in retention time, it makes up for in potency: CH4 has approximately 80 times the warming impact of CO2 over a 20‐year period. That means it has a greater impact on near‐term (20‐year) te

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Kolkman-Quinn, Brendan, Donald C. Lawton, and Marie Macquet. "CO2 leak detection threshold using vertical seismic profiles." International Journal of Greenhouse Gas Control 123 (February 2023): 103839. http://dx.doi.org/10.1016/j.ijggc.2023.103839.

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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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23

Yang, Yunting, Jiachen Jiang, Jiafu Zeng, Zhangxiong Chen, Xiaosong Zhu, and Yiwei Shi. "CH4, C2H6, and CO2 Multi-Gas Sensing Based on Portable Mid-Infrared Spectroscopy and PCA-BP Algorithm." Sensors 23, no. 3 (2023): 1413. http://dx.doi.org/10.3390/s23031413.

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A multi-gas sensing system was developed based on the detection principle of the non-dispersive infrared (NDIR) method, which used a broad-spectra light source, a tunable Fabry–Pérot (FP) filter detector, and a flexible low-loss infrared waveguide as an absorption cell. CH4, C2H6, and CO2 gases were detected by the system. The concentration of CO2 could be detected directly, and the concentrations of CH4 and C2H6 were detected using a PCA-BP neural network algorithm because of the interference of CH4 and C2H6. The detection limits were achieved to be 2.59 ppm, 926 ppb, and 114 ppb for CH4, C2H

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Chen, Jiuying, Pengxiang Cui, Chuncheng Zhou, et al. "Detection of CO2 and CH4 Concentrations on a Beijing Urban Road Using Vehicle-Mounted Tunable Diode Laser Absorption Spectroscopy." Photonics 10, no. 8 (2023): 938. http://dx.doi.org/10.3390/photonics10080938.

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The analysis of greenhouse gas emission characteristics on urban roads is of great significance for understanding the sources and sinks of urban greenhouse gases and their changing patterns. Based on tunable diode laser derivative absorption spectroscopy technology, which features high resolution, high sensitivity, and fast response, a vehicle-mounted system capable of simultaneously detecting CO2 and CH4 has been developed. The system has a response time of 0.38 s, with detection sensitivities of 5 ppb for CH4 and 0.2 ppm for CO2, power consumption of approximately 4.8 W, a weight of less tha

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Maazallahi, Hossein, Antonio Delre, Charlotte Scheutz, et al. "Intercomparison of detection and quantification methods for methane emissions from the natural gas distribution network in Hamburg, Germany." Atmospheric Measurement Techniques 16, no. 21 (2023): 5051–73. http://dx.doi.org/10.5194/amt-16-5051-2023.

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Abstract. In August and September 2020, three different measurement methods for quantifying methane (CH4) emissions from leaks in urban gas distribution networks were applied and compared in Hamburg, Germany: the “mobile”, “tracer release”, and “suction” methods. The mobile and tracer release methods determine emission rates to the atmosphere from measurements of CH4 mole fractions in the ambient air, and the tracer release method also includes measurement of a gaseous tracer. The suction method determines emission rates by pumping air out of the ground using soil probes that are placed above

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Wang, Kunyang, Ligang Shao, Jiajin Chen, et al. "A Dual-Laser Sensor Based on Off-Axis Integrated Cavity Output Spectroscopy and Time-Division Multiplexing Method." Sensors 20, no. 21 (2020): 6192. http://dx.doi.org/10.3390/s20216192.

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In this article, a compact dual-laser sensor based on an off-axis integrated-cavity output spectroscopy and time-division multiplexing method is reported. A complete dual-channel optical structure is developed and integrated on an optical cavity, which allows two distributed feedback (DFB) lasers operating at wavelengths of 1603 nm and 1651 nm to measure the concentration of CO2 and CH4, simultaneously. Performances of the dual-laser sensor are experimentally evaluated by using standard air (with a mixture of CO2 and CH4). The limit of detection (LoD) is 0.271 ppm and 1.743 ppb at a 20 s for C

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Effendy, M., Yogi Wibisono Budhi, Yazid Bindar, and S. Subagjo. "Metode operasi reverse flow reactor dengan umpan fluktuatif dalam pengolahan emisi gas metana di stasiun kompresor." Jurnal Teknik Kimia Indonesia 8, no. 3 (2018): 74. http://dx.doi.org/10.5614/jtki.2009.8.3.1.

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Operation method of reverse flow reactor with fluctuating feed for methane gas emmision processing in compressor station.The leak of CH4 from the compressor stations can not be avoided and it may cause the global warming. The impact of the global warming can be reduced by oxidizing CH4 into CO2. The CH4 capture strategy using the exhaust mounted on the top of the building causes (1) CH4 levels detected in the gas mixture is very small (±1% volume), (2) the feed gas temperature is near the ambient temperature (±30 oC), (3) the CH4 concentration fluctuates over time. The reverse flow reactor (RF

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Carpenter, Chris. "Study Investigates Seismic Monitoring for Carbon Storage Leak Detection." Journal of Petroleum Technology 76, no. 02 (2024): 86–88. http://dx.doi.org/10.2118/0224-0086-jpt.

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_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper IPTC 22980, “Carbon Storage Leak Detection Through Seismic FWI and RTM: Different Survey Analyses,” by Sajjad Amani, Kyoto University. The paper has not been peer reviewed. Copyright 2023 International Petroleum Technology Conference. Reproduced by permission. _ In the complete paper, marine seismic data processing is investigated as a tool for monitoring possible leakages in geological carbon storage. Because of the great importance of storage permanence, a precise leakage-monitoring strategy is cru

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Chen, Xiang, Hao Liu, Mai Hu, et al. "Frequency-Domain Detection for Frequency-Division Multiplexing QEPAS." Sensors 22, no. 11 (2022): 4030. http://dx.doi.org/10.3390/s22114030.

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To achieve multi-gas measurements of quartz-enhanced photoacoustic spectroscopy (QEPAS) sensors under a frequency-division multiplexing mode with a narrow modulation frequency interval, we report a frequency-domain detection method. A CH4 absorption line at 1653.72 nm and a CO2 absorption line at 2004.02 nm were investigated in this experiment. A modulation frequency interval of as narrow as 0.6 Hz for CH4 and CO2 detection was achieved. Frequency-domain 2f signals were obtained with a resolution of 0.125 Hz using a real-time frequency analyzer. With the multiple linear regressions of the freq

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Chen, Ke, Yewei Chen, Bo Zhang, et al. "Highly Sensitive Photoacoustic Microcavity Gas Sensor for Leak Detection." Sensors 20, no. 4 (2020): 1164. http://dx.doi.org/10.3390/s20041164.

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A highly sensitive photoacoustic (PA) microcavity gas sensor for leak detection is proposed. The miniature and low-cost gas sensor mainly consisted of a micro-electro-mechanical system (MEMS) microphone and a stainless-steel capillary with two small holes opened on the side wall. Different from traditional PA sensors, the designed low-power sensor had no gas valves and pumps. Gas could diffuse into the stainless-steel PA microcavity from two holes. The volume of the cavity in the sensor was only 7.9 μL. We use a 1650.96 nm distributed feedback (DFB) laser and the second-harmonic wavelength mod

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Siozos, Panagiotis, Giannis Psyllakis, and Michalis Velegrakis. "Remote Operation of an Open-Path, Laser-Based Instrument for Atmospheric CO2 and CH4 Monitoring." Photonics 10, no. 4 (2023): 386. http://dx.doi.org/10.3390/photonics10040386.

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The technical specifications and the evaluation of the remote operation of the open-path, tunable diode laser absorption spectroscopic (TDLAS) instrument are presented. The instrument is equipped with two low optical power diode lasers in the near-infrared spectral range for the atmospheric detection of carbon dioxide, methane, and water vapors (CO2, CH4, and H2O). Additionally, the instrument eliminates the requirement of retroreflectors since it detects the back reflection of the laser beam from any topographic target. The instrument was operated remotely by measuring background concentratio

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Siozos, Panagiotis, Giannis Psyllakis, Peter C. Samartzis, and Michalis Velegrakis. "Autonomous Differential Absorption Laser Device for Remote Sensing of Atmospheric Greenhouse Gases." Remote Sensing 14, no. 3 (2022): 460. http://dx.doi.org/10.3390/rs14030460.

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A ground-based, integrated path, differential absorption (IPDA) light detection device capable of measuring multiple greenhouse gas (GHG) species in the atmosphere is presented. The device was developed to monitor greenhouse gas concentrations in small-scale areas with high emission activities. It is equipped with two low optical power tunable diode lasers in the near-infrared spectral range for the atmospheric detection of carbon dioxide, methane, and water vapors (CO2, CH4 and H2O). The device was tested with measurements of background concentrations of CO2 and CH4 in the atmosphere (Crete,

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Wilson, Padarn, Andrew Feitz, Charles Jenkins, et al. "Sensitivity of CO2 leak detection using a single atmospheric station." Energy Procedia 63 (2014): 3907–14. http://dx.doi.org/10.1016/j.egypro.2014.11.420.

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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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Nicoloso, Rodrigo da Silveira, Cimélio Bayer, Genuir Luis Denega, et al. "Gas chromatography and photoacoustic spectroscopy for the assessment of soil greenhouse gases emissions." Ciência Rural 43, no. 2 (2013): 262–69. http://dx.doi.org/10.1590/s0103-84782013000200012.

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Assessments of soil carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) emissions are critical for determination of the agricultural practices' potential to mitigate global warming. This study evaluated the photoacoustic spectroscopy (PAS) for the assessment of soil greenhouse gases (GHG) fluxes in comparison to the standard gas chromatography (GC) method. Two long-term experiments with different tillage and cropping systems over a Paleudult were evaluated using static chambers. PAS measurements of CO2 and N2O concentrations showed good relationship and linearity (R2=0.98 and 0.94, re

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Wu, Xu, Yulong Du, Shijian Shi, et al. "Simultaneous Detection of CO2 and CH4 Using a DFB Diode Laser-Based Absorption Spectrometer." Chemosensors 10, no. 10 (2022): 390. http://dx.doi.org/10.3390/chemosensors10100390.

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In this paper, an attractive gas sensing technique based on fiber optical sensing ideal was developed for the detection of multi-gas species simultaneously. Calibration-free laser absorption spectroscopy (LAS) was used and combined with a multi-pass optical absorption cell, two fiber-coupled near-infrared (NIR) distributed feedback (DFB) diode lasers are used and coupled into a single optical path for measuring CO2 and CH4 absorption spectra simultaneously. The optimal sampling pressure, laser tuning characteristics, spectral sampling points, and potential optical interference are theoreticall

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Zhao, Wen, Nouha Alcheikh, Sofiane Ben Mbarek, and Mohammad I. Younis. "Multi-functional resonant micro-sensor for simultaneous magnetic, CO₂, and CH₄ detection." Journal of Applied Physics 132, no. 14 (2022): 144502. http://dx.doi.org/10.1063/5.0104007.

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We present a highly sensitive multi-parameter sensor for magnetic and gas detection. The device is based on an in-plane doubly clamped micro-beam micro-resonator, which is electrothermally heated. It acts as a Lorentz force magnetic sensor of high sensitivity, good linearity, good repeatability, and low hysteresis effect. It also functions as a gas-sensor based on the cooling/heating effect of the micro-beam as demonstrated for carbon dioxide (CO2) and methane (CH4) detection. The CO2/CH4 sensor shows high sensitivity and excellent linearity. In addition, we demonstrate simultaneous magnetic a

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Schmidt, Mark, Peter Linke, Stefan Sommer, Daniel Esser, and Sergiy Cherednichenko. "Natural CO2 Seeps Offshore Panarea: A Test Site for Subsea CO2 Leak Detection Technology." Marine Technology Society Journal 49, no. 1 (2015): 19–30. http://dx.doi.org/10.4031/mtsj.49.1.3.

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AbstractDuring RV Poseidon cruise POS469 (May 2014), the distribution of pCO2 in the near field of submarine volcanic gas flares in shallow water depths down to 50 m below sea level was continuously monitored using three different and independent methodologies. In situ nondispersive infrared (NDIR) spectrometry, pH measurements, and onboard membrane inlet mass spectrometry (MIMS) were used to determine the fate of rising CO2 bubbles and the dissolved CO2 plume patterns in a 300 × 400-m working area. The In situ sensor carrier platform, a towed video-controlled water sampling rosette, equipped

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Eminov, R. A., and N. Z. Mursalov. "DEVELOPMENT OF NEW METHODS FOR DETECTION OF LEAKS OF HYDROCARBON GAS." Kontrol'. Diagnostika, no. 251 (May 2019): 60–64. http://dx.doi.org/10.14489/td.2019.05.pp.060-064.

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The paper is devoted to development of new methods for detection of leaks of hydrocarbon gas. It is determined that the wellknown fact on inverse interrelation of concentration of oxygen and such gases as N2 and CH4 can be used for remote determination of leaks of hydrocarbon gases. The gradient method for detection of leaks of natural gas composed of determination of two directions with minimum value of gradient of concentration of O2 in two fixed points and characterization of the point of crossing of them as a site of leak is suggested. The method of circles for detection of natural gases l

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Maazallahi, Hossein, Julianne M. Fernandez, Malika Menoud, et al. "Methane mapping, emission quantification, and attribution in two European cities: Utrecht (NL) and Hamburg (DE)." Atmospheric Chemistry and Physics 20, no. 23 (2020): 14717–40. http://dx.doi.org/10.5194/acp-20-14717-2020.

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Abstract. Characterizing and attributing methane (CH4) emissions across varying scales are important from environmental, safety, and economic perspectives and are essential for designing and evaluating effective mitigation strategies. Mobile real-time measurements of CH4 in ambient air offer a fast and effective method to identify and quantify local CH4 emissions in urban areas. We carried out extensive campaigns to measure CH4 mole fractions at the street level in Utrecht, the Netherlands (2018 and 2019), and Hamburg, Germany (2018). We detected 145 leak indications (LIs; i.e., CH4 enhancemen

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Pihlatie, M. K., R. Kiese, N. Brüggemann, et al. "Greenhouse gas fluxes in a drained peatland forest during spring frost-thaw event." Biogeosciences Discussions 6, no. 3 (2009): 6111–45. http://dx.doi.org/10.5194/bgd-6-6111-2009.

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Abstract. Fluxes of greenhouse gases (GHG) carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) were measured during a two month campaign at a drained peatland forest in Finland by the eddy covariance (EC) technique (CO2 and N2O), and automatic and manual chambers (CO2, CH4 and N2O). In addition, GHG concentrations and soil parameters (mineral nitrogen, temperature, moisture content) in the peat profile were measured. The aim of the measurement campaign was to quantify the GHG fluxes before, during and after thawing of the peat soil, a time period with potentially high GHG fluxes, and t

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Pihlatie, M. K., R. Kiese, N. Brüggemann, et al. "Greenhouse gas fluxes in a drained peatland forest during spring frost-thaw event." Biogeosciences 7, no. 5 (2010): 1715–27. http://dx.doi.org/10.5194/bg-7-1715-2010.

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Abstract. Fluxes of greenhouse gases (GHG) carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) were measured during a two month campaign at a drained peatland forest in Finland by the eddy covariance (EC) technique (CO2 and N2O), and automatic and manual chambers (CO2, CH4 and N2O). In addition, GHG concentrations and soil parameters (mineral nitrogen, temperature, moisture content) in the peat profile were measured. The aim of the measurement campaign was to quantify the GHG fluxes during freezing and thawing of the top-soil, a time period with potentially high GHG fluxes, and to comp

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Loyon, L., F. Guiziou, and P. Saint Cast. "Impact of manure management of different livestock on gaseous emissions: laboratory study." Australian Journal of Experimental Agriculture 48, no. 2 (2008): 128. http://dx.doi.org/10.1071/ea07263.

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A laboratory study investigated the impact of manure management and air temperature on the gaseous emissions of ammonia (NH3), methane (CH4), nitrous oxide (N2O) and carbon dioxide (CO2) from manure stored under summer and winter conditions. Trials were carried out for 10–18 days on a pilot scale and were located outside the laboratory with a standardised protocol for ambient air speed. The concentrations of N2O, CH4, and CO2 in exhaust air from the storage vessel were analysed sequentially either by infrared detection or by gas chromatography coupled with a flame ionisation detector/electron

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Xiao, Chunlei, Bihong Fu, Hanqing Shui, Zhaocheng Guo, and Jurui Zhu. "Detecting the Sources of Methane Emission from Oil Shale Mining and Processing Using Airborne Hyperspectral Data." Remote Sensing 12, no. 3 (2020): 537. http://dx.doi.org/10.3390/rs12030537.

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Methane (CH4) is one of important greenhouse gases that affects the global radiative balance after carbon dioxide (CO2). Previous studies have demonstrated the detection of known sources of CH4 emission using the hyperspectral technology based on in situ vertical CH4 profile or ground CH4 emissions data. However, those approaches have not yet to detect the unknown terrestrial sources of CH4 emission at local-scale or regional-scale. In this paper, the Shortwave Airborne Spectrographic Imager (SASI) was employed to detect concentrated sources of CH4 emissions based on the absorption of CH4 in t

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Zhu, Tao, Xiao Chen, Shengping Wu, Jingjing Liu, Qi Liu, and Zhao Rao. "Numerical Simulation of Urban Natural Gas Leakage Dispersion: Evaluating the Impact of Wind Conditions and Urban Configurations." Atmosphere 15, no. 4 (2024): 472. http://dx.doi.org/10.3390/atmos15040472.

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This study investigates the dispersion of natural gas leakages in urban environments under varying wind conditions (Beaufort levels 1, 2, and 6) and street layouts, with a focus on the implications for mobile leak detection at a height of 0.3 m above ground. Through numerical simulations, we analyze how urban canyons influence wind field and methane (CH4) concentration distributions, highlighting the impact of wind speed and urban geometry on gas dispersion. The key findings indicate that urban structures significantly affect gas dispersion patterns, with higher wind speeds facilitating better

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Oleksenko, L. P., N. P. Maksymovych, I. P. Matushko, G. V. Fedorenko, O. P. Ripko, and L. V. Lutsenko. "Chromatographic Detector Based on Adsorption-Semiconductor Sensor for Detection of Reducing Gases in Air." Methods and Objects of Chemical Analysis 17, no. 1 (2022): 34–42. http://dx.doi.org/10.17721/moca.2022.34-42.

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A semiconductor sensor with a gas sensitive layer based on SnO2 and Sb2O5 with Pd additive synthesized by co-precipitation was studied as a chromatographic detector. It was found that the subject detector, using air as a carrier gas, can selectively detect each of the reducing gases (H2, CO, CH4, C2H2, C2H4, C2H6) which can leak into transformer oil if defects emerge during high-voltage transformers operation. It was established that for the fabricated detector the dependences of the signals on concentrations of the analyzed gases are linear in the range of 0–50 ppm for H2, CO, CH4 and 0–100 p

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Somekawa, Toshihiro, and Masayuki Fujita. "Raman spectroscopy measurement of CH4 gas and CH4 dissolved in water for laser remote sensing in water." EPJ Web of Conferences 176 (2018): 01021. http://dx.doi.org/10.1051/epjconf/201817601021.

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We examined the applicability of Raman spectroscopy as a laser remote sensing tool for monitoring CH4 in water. The Raman technique has already been used successfully for measurements of CO2 gas in water. In this paper, considering the spectral transmittance of water, third harmonics of Q-switched Nd:YAG laser at 355 nm (UV region) was used for detection of CH4 Raman signals. The Raman signal at 2892 cm-1 from CH4 dissolved in water was detected at a tail of water Raman signal.

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Cheng, Yaopeng, Yinghe Xu, Ting Chen, Huaiyu Mei, and Sailing He. "Differential laser-induced thermoelastic spectroscopy for dual-gas CO2/CH4 detection." Measurement 240 (January 2025): 115594. http://dx.doi.org/10.1016/j.measurement.2024.115594.

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van Leeuwen, Charlotte, Arjan Hensen, and Harro A. J. Meijer. "Leak detection of CO2 pipelines with simple atmospheric CO2 sensors for carbon capture and storage." International Journal of Greenhouse Gas Control 19 (November 2013): 420–31. http://dx.doi.org/10.1016/j.ijggc.2013.09.018.

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Mazza, Francesco, Ona Thornquist, Leonardo Castellanos та ін. "The ro-vibrational ν₂ mode spectrum of methane investigated by ultrabroadband coherent Raman spectroscopy". Journal of Chemical Physics 158, № 9 (2023): 094201. http://dx.doi.org/10.1063/5.0138803.

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We present the first experimental application of coherent Raman spectroscopy (CRS) on the ro-vibrational ν2 mode spectrum of methane (CH4). Ultrabroadband femtosecond/picosecond (fs/ps) CRS is performed in the molecular fingerprint region from 1100 to 2000 cm−1, employing fs laser-induced filamentation as the supercontinuum generation mechanism to provide the ultrabroadband excitation pulses. We introduce a time-domain model of the CH4 ν2 CRS spectrum, including all five ro-vibrational branches allowed by the selection rules Δv = 1, Δ J = 0, ±1, ±2; the model includes collisional linewidths, c

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