Public aircraft engine certification data provide a reproducible basis for emissions modeling when the proprietary combustor geometry, engine cycle data, and detailed operating histories are unavailable. This study develops a physically constrained r...
Agriculture is both a source of greenhouse gases (GHGs) and a potential carbon sink, so mitigation must distinguish direct emission reduction from carbon removal. This study quantifies Portuguese agricultural emissions and assesses how carbon farming...
Liquefied natural gas (LNG) is increasingly central to global energy strategy, positioned as a lower-emission transition fuel. That positioning assumes fugitive methane emissions across the LNG supply chain are well-characterised, yet direct measurem...
Natural gas processing plants (NGPP) contribute considerably to greenhouse-gas emissions, especially when processing carbon dioxide rich (CO2-rich) natural gas. Therefore, it is urgent and of general interest to study the decarbonization of such plan...
Indoor air quality (IAQ) is a critical determinant of occupant health, comfort, and cognitive performance, particularly in densely occupied indoor environments such as libraries. This study aims to quantify particulate matter (PM) dispersion dynamics...
This study examines agricultural greenhouse-gas (GHG) emission scale and source composition across a fixed EU-27 geographical cohort and Mercosur-4 (Argentina, Brazil, Paraguay, and Uruguay) over 2002–2023. Using FAOSTAT emissions totals, a bal...
The relationship between natural gas wealth and socioeconomic development has yielded conflicting results in the “resource curse” literature. This study reframes the issue, shifting the focus from whether gas constitutes a curse to determ...
Quantitative comparisons of geological CO2 storage projects often compare quantities, assets, operation period, and legal obligations that relate to different services. This critical integrative review analyzes nineteen selected geological CO2 storag...
Hydrogen blending and biogas upgrading are usually treated as separate routes for decarbonizing gas networks. This work investigates their direct combination through a nonlinear optimization framework for the compositional design of natural gas (NG),...
Rapid motorization and urbanization have made the transport sector a dominant contributor to air pollution in developing economies such as India. In this study, vehicular emission trends were investigated in Bhubaneswar, a Tier-II smart city, using a...
Carbon isotope trends of light hydrocarbons in mature to overmature natural gases are commonly evaluated against gas wetness ([C2 + C3]/[C1 + C2 + C3]), yet the geometric effects of component-specific abundance contrasts are often conflated with reac...
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 (...
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 requi...
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, n...
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 atmospher...
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 abilit...
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 i...
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 inject...
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, presen...
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 boun...
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...
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...
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 iterat...
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...
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 prov...
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 m...
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 d...
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...
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 fo...
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...
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 conditio...
Maritime transport accounts for around 3% of global anthropogenic greenhouse gas (GHG) emissions, a share expected to grow without effective technological and regulatory intervention. Recent policy developments, including the IMO Revised GHG Strategy...
Metal-organic frameworks (MOFs), particularly ELM-11, are promising sorbents for CO2 capture due to their gate-opening phenomenon and excellent reusability. Since actual exhaust gases contain impurities such as NO2, in this study, the effect of NO2 o...
The integration of catalytic methane decomposition (CMD) with CO2 gasification (Reverse Boudouard Reaction) offers a promising chemical looping route for carbon-negative hydrogen and syngas production. This work systematically investigates the gasifi...
Flaring is necessary to prevent pressure buildup in the unit. Due to hydrotreatment processes at the refinery, flare gas can contain significant amounts of hydrogen sulfide. Combusting this gas can result in environmental and health issues. One metho...
Electronic nose platforms based on metal-oxide (MOX) sensors offer potential for low-power gas classification under dynamic operating conditions. This study evaluates a BME688-based digital nose configured with a temperature-modulated heater profile...
During natural gas production and transportation, multi-stage pressure regulation is often required to meet downstream pressure demands, resulting in substantial waste of residual pressure energy at high-pressure wellheads. This study focuses on high...
Carbon dioxide (CO2) enrichment using fuel combustion is widely applied in greenhouse production. However, its implications for air quality and occupational safety under real operating conditions remain insufficiently characterized. This study evalua...
As the global imperative for climate neutrality intensifies, hydrogen (H2) from fossil fuels remains central to decarbonizing hard-to-abate sectors. Conventional production via steam methane reforming (SMR), however, is carbon-intensive and, even wit...
Methane emissions from end-use installations in residential natural gas systems remain poorly quantified, despite their importance to both safety and climate policies worldwide. While distribution networks and appliances have received research attent...
Gas condensate banking can significantly reduce near-well gas productivity by as much as ~60% in tight gas reservoirs. Existing treatment techniques are resource demanding and could alter the reservoir structure permanently. This study investigates t...
This study numerically investigates the conversion of a Heavy-Duty (HD) Spark-Ignition (SI) Compressed Natural Gas (CNG) engine to operate with hydrogen-rich syngas produced from waste plastic pyrolysis. The engine was modeled with a one-dimensional...
Synthetic natural gas (SNG) production from biomass residues represents a promising strategy to reduce greenhouse gas emissions and enhance energy security in regions with abundant agricultural waste. This study evaluates the thermodynamic performanc...
This research investigates wettability-induced, preferential, pressure-driven bubble nucleation of gases from a multi-gas dissolved liquid system in hydrophilic and hydrophobic glass vials. The hydrophobic glass surfaces were prepared using (heptadec...
This study examines how different sustainability assessment approaches influence climate-policy choices when evaluating greenhouse gas (GHG) emissions across industrial value chains. Using Spain as an empirical setting, we apply Environmentally Exten...
An experiment was conducted to produce synthesis gas (main components CO and H2) via plasma–steam gasification of brown coal with an ash content of 9% and a volatile matter yield of 48%. Satisfactory agreement between the calculation results an...
In South Asia, smog has become a critical environmental concern that endangers public health, ecosystems, and the regional climate. To determine the primary causes of smog formation in Lahore during peak polluted months (October and November), the cu...
This review examines the emerging concepts of hydrogen production and storage directly within hydrocarbon reservoirs (in situ), evaluating their technical feasibility, infrastructure requirements, challenges, and potential role in net-zero strategies...
This study presents a techno-economic assessment of a modular, solar-assisted methane pyrolysis pilot plant designed for sustainable hydrogen production in Nigeria using concentrated solar power (CSP). Driven by the need to convert flare gas into val...
This study examines the determinants of U.S. CO2 emissions and provides evidence to inform more effective carbon-reduction policies. Using Autoregressive Distributed Lag (ARDL) and Nonlinear ARDL (NARDL) models, the analysis covers January 1997 to Fe...
