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Gases
Scopus
ISSN 2673-5628 · MDPI AG · 125 artikel di indeks
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Artikel Jurnal Teks lengkap
Beyond Snapshots: Building Methane Measurement-Informed Inventories for Midstream Oil and Gas Sites in the Appalachian Basin
This paper presents the application of a novel methodology to build a comprehensive Measurement-Informed Inventory (MII) by integrating unreported emissions into government inventories. These emissions are often excluded from current regulatory requirements or associated with upset conditions, and…
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Quantifying the Long-Run Carbon Reduction Associations of Coal Phasedown in China: Evidence from the Bootstrap ARDL Model
China’s pursuit of its dual-carbon targets—carbon peaking before 2030 and carbon neutrality before 2060—critically hinges on the structural decarbonization of its energy system. Utilizing a Bootstrap Autoregressive Distributed Lag (Bootstrap ARDL) bounds testing framework on macro-level time-series…
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Thermodynamic Analysis of Methanation of Pyrolysis Gas from Anthropogenic Residues
The methanation of pyrolysis gas was investigated using the open access software DWSIM v9.0.5 to assess its potential for producing methane-rich gas. The pyrolysis gas composition was derived from known experimental tests of anthropogenic residues, namely sewage sludge and digestate. Four gas…
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Combined Enhancement of Biohydrogen Production in the Halotolerant Cyanobacterium Aphanothece halophytica by Reducing Agents and Glucose Under Nitrogen-Deprived Dark Anaerobic Conditions
Hydrogen (H2) is a promising renewable energy carrier because of its high energy density and environmentally friendly characteristics. The halotolerant cyanobacterium Aphanothece halophytica is a potential biological H2 producer because of its ability to generate H2 via oxygen-sensitive hydrogenase…
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Seawater Acidification and Bubble Plume Dispersion from Accidental Subsea CO2 Pipeline Rupture: A Multiphase CFD Study
If a CO2 reservoir or transmission pipeline were to leak, both the surrounding ecology and maritime traffic safety could be put at risk. To better understand and prepare for this risk, multiphase Computational Fluid Dynamics (CFD) models were built in ANSYS Fluent to capture the behavior of a leak…
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Algae Bioreactor Performance Under Different Light Wavelengths
The rising concentration of carbon dioxide (CO2) in the atmosphere is a pressing challenge since it is a major contributor to climate change. Algae, a group of photosynthetic organisms, have attracted attention for their potential to absorb atmospheric CO2, particularly in industrial…
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Satellite-Based Atmospheric Gas Monitoring in Maritime Chokepoints: Integration of Sentinel-5P TROPOMI and AIS Data for Emission Control in the Istanbul Strait
Anthropogenic greenhouse gases (GHGs) and emissions from maritime transport represent a significant challenge for atmospheric monitoring and control. The Istanbul Strait, characterized by its narrow, winding geography and high traffic density, presents a unique chokepoint where these emissions…
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Cyclic Hydrogen Injection Effects on Mechanical and Physical Properties of Berea Sandstone: Implications for Underground Hydrogen Storage
Large-scale and long-term hydrogen storage is a key requirement for a sustainable hydrogen-based energy system. Although underground hydrogen storage (UHS) in porous media has gained increasing attention, the behavior of hydrogen during cyclic injection and withdrawal remains poorly understood…
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Beyond Reactive Operation: Sensor-Informed Model Predictive Control for Renewable Hydrogen Storage
Renewable hydrogen storage can absorb surplus wind and solar generation, reduce curtailment, and provide a flexible energy carrier. Its value depends not only on the electrolyzer, storage tank, and fuel cell, but also on the operational strategy used to coordinate these components. This study…
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Crossing the Nitrogen Line: Cropland Emissions, Planetary Boundaries, and the SDGs
Fertilised cropland systems are the dominant source of reactive nitrogen losses in the global environment, contributing most anthropogenic nitrous oxide emissions and driving agricultural nitrogen surplus to nearly three times the safe planetary boundary for nitrogen. This review advances a…
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Monetising Nigeria’s Flared Gas: A Site-Specific Financial Analysis of Three Utilisation Pathways Across Three Flare Sites
This study provides a site-specific, unlevered financial screening of gas-to-power, gas-to-pipeline, and gas-to-compressed-natural-gas (CNG) options at three Nigerian flare sites: Amukpe (1.16 MMscf/d), Oziengbe South (5.15 MMscf/d), and Oben (10.88 MMscf/d). The cases are evaluated from the…
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Modeling and Simulation of Biomethane Injection in a Gas Distribution Network in Uzbekistan Towards a More Secure and Green Energy Supply
This study assesses the potential of biomethane integration into a gas distribution net-work to improve supply reliability under constrained operating conditions. A steady-state, isothermal network model based on graph theory and a SIMPLE-type iterative algorithm was developed to simulate pressure…
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Variation in Total Volatile Organic Compounds and Health Risk Assessment Across Different Hair Salons
Workers are exposed to pollutants generated by hair salon activities, which may pose potential health risks. This study measured volatile organic compound (VOC) concentrations in five hair salons using a high-sensitivity photoionization detector (PID) during daily work shifts. The highest VOC…
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Fragmentation and Vulnerability in the Global Natural Gas Market for a Sample of 59 Countries: A Combined Approach of Econometric Modeling and Hierarchical Clustering
This article aims to examine how the natural gas market evolved following the price shocks observed between 2020 and 2024, paying particular attention to market integration and the persistence of these shocks. The proposed analysis uses daily price data for the Title Transfer Facility (TTF), the…
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Real-Gas Corrected Knudsen-Based Flow Regime Mapping of Methane in Nanoporous Media: Sensitivity, Validity Limits, and Engineering Implications
Understanding how methane moves through nanoporous media is key to predicting performance in unconventional gas reservoirs. At these extremely small scales, pore sizes approach the molecular level, where classical flow assumptions begin to fail and multiple transport mechanisms can occur at the…
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Preliminary Assessment of Measurement Frequency and Replication Effects on Season-Long Greenhouse Gas Emissions and Global Warming Potential Estimation Consistency Among Various Ecosystems
For soil processes that are known to be temporally dynamic, such as soil respiration, methanogenesis, and nitrification–denitrification, it is challenging to capture temporal variations with field-portable greenhouse gas (GHG) analyzers to provide the most accurate estimates of season-long GHG…
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Introducing CdZnTe Detectors into Measuring 222Rn Concentrations in Water
Radon (222Rn) is a noble, radioactive gas and tends to be accumulated in poorly ventilated enclosed spaces. Mainly due to its radioactive daughters and the α-particles emitted, 222Rn poses a risk of cancer and therefore its concentration in air and water should be kept under certain reference…
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CO2 and CH4 Adsorption Behavior in Early-Mature Shales: An Experimental Study from the Cesar-Ranchería Basin, Colombia
This study presents experimental adsorption–desorption data of CH4 and CO2 on shale samples from the Cesar-Ranchería Basin, Colombia, a region with limited characterization of gas–rock interactions under reservoir-relevant conditions. The work addresses the behavior of early-mature shales…
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Artificial Intelligence-Driven Failure Analysis of Smog Mitigation for Sustainable Indoor Air Quality
In megacities, where conventional mitigation strategies exhibit variable and environment-dependent performance, urban air pollution continues to be a significant public health concern. To methodically assess the operational reliability of urban smog mitigation systems under dynamic atmospheric…
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A Correction for the Cylinder Wall Adsorption in Forensic Ethanol Gas Standards
Forensic ethanol gas standards are used for, among other things, the calibration and metrological verification of evidential breath analysers as described in OIML-R126 Evidential breath analysers. A correction for the amount fraction of ethanol in forensic gas standards due to cylinder wall…