A5089467644- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Air Quality and Health Impacts
- Academic Writing and Publishing
- Chemistry and Chemical Engineering
- Vehicle emissions and performance
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Oil, Gas, and Environmental Issues
- Hydrocarbon exploration and reservoir analysis
- Environmental Impact and Sustainability
- Global Energy and Sustainability Research
- Process Optimization and Integration
- Sustainable Industrial Ecology
- Carbon Dioxide Capture Technologies
- Recycling and Waste Management Techniques
- Sustainability in Higher Education
- Wind and Air Flow Studies
- Climate Change Policy and Economics
- Catalytic Processes in Materials Science
- Reservoir Engineering and Simulation Methods
- Various Chemistry Research Topics
- Inorganic and Organometallic Chemistry
- Engineering Education and Curriculum Development
- Atmospheric aerosols and clouds
The University of Texas at Austin
2015-2024
Center for Environmental Health
2007-2024
St Nicholas Hospital
2021-2024
Allen (United States)
2021-2024
Medical University of South Carolina
2022-2023
UConn Health
2022-2023
American Academy of Dermatology
2022-2023
University of Bristol
2023
Wythenshawe Hospital
2005-2023
St. Luke's University Health Network
2023
Methane emissions from the U.S. oil and natural gas supply chain were estimated by using ground-based, facility-scale measurements validated with aircraft observations in areas accounting for ~30% of production. When scaled up nationally, our facility-based estimate 2015 is 13 ± 2 teragrams per year, equivalent to 2.3% gross This value ~60% higher than Environmental Protection Agency inventory estimate, likely because existing methods miss released during abnormal operating conditions. this...
Significance This work reports direct measurements of methane emissions at 190 onshore natural gas sites in the United States. The indicate that well completion are lower than previously estimated; data also show from pneumatic controllers and equipment leaks higher Environmental Protection Agency (EPA) national emission projections. Estimates total similar to most recent EPA inventory production. These will help inform policymakers, researchers, industry, providing information about some...
Abstract Effectively mitigating methane emissions from the natural gas supply chain requires addressing disproportionate influence of high-emitting sources. Here we use a Monte Carlo simulation to aggregate all components on production sites in Barnett Shale region (Texas). Our total emission estimates are two-thirds those derived independent site-based measurements. Although some operations occur by design (condensate flashing and liquid unloadings), they more than an order magnitude less...
The Second Texas Air Quality Study (TexAQS II) was conducted in eastern during 2005 and 2006. This 2‐year study included an intensive field campaign, TexAQS 2006/Gulf of Mexico Atmospheric Composition Climate (GoMACCS), August–October results reported this special journal section are based on observations collected four aircraft, one research vessel, networks ground‐based air quality meteorological (surface radar wind profiler) sites Texas, a balloon‐borne ozonesonde‐radiosonde network (part...
Microalgae are currently considered a potential feedstock for the production of biofuels. This work addresses energy needed to manage water used in mass cultivation saline, eukaryotic algae grown open pond systems. Estimates both direct and upstream requirements obtaining, containing, circulating within systems developed. Potential productivities calculated each 48 states continental U.S. based on theoretical photosynthetic efficiencies, growing season, total available land area. Energy...
Emissions from 377 gas actuated (pneumatic) controllers were measured at natural production sites and a small number of oil sites, throughout the United States. A subset devices (19%), with whole emission rates in excess 6 standard cubic feet per hour (scf/h), accounted for 95% emissions. More than half recorded emissions 0.001 scf/h or less during 15 min measurement. Pneumatic level control applications on separators compressor had higher other types applications. Regional differences...
Methane emissions from liquid unloadings were measured at 107 wells in natural gas production regions throughout the United States. Liquid clear of accumulated liquids to increase production, employing a variety lifting mechanisms. In this work, with and without plunger lifts sampled. Most unload less than 10 times per year averaging 21 000–35 000 scf methane (0.4–0.7 Mg) event (95% confidence limits 000–50 scf/event). For lifts, averaged 1000–10 (0.02–0.2 500–12 Some are automatically...
Methane emissions from the natural gas supply chain are a key factor in determining greenhouse footprint of production and use. Recent estimates these have varied widely, because large population sources, different measurement estimation approaches, extreme values emission rates individual sources that much larger than average same category (a 'fat-tail' distribution). Reconciling differences between ambient methane concentration measurements (top-down methods) direct (bottom-up is critical...
ADVERTISEMENT RETURN TO ISSUEEditorialNEXTGreen Chemistry: A Framework for a Sustainable FutureKrishna N. GaneshKrishna GaneshMore by Krishna Ganeshhttps://orcid.org/0000-0003-2292-643X, Deqing ZhangDeqing ZhangMore Zhanghttps://orcid.org/0000-0002-5709-6088, Scott J. MillerScott MillerMore Millerhttps://orcid.org/0000-0001-7817-1318, Kai RossenKai RossenMore Rossenhttps://orcid.org/0000-0002-3857-0004, Paul ChirikPaul ChirikMore Chirikhttps://orcid.org/0000-0001-8473-2898, Marisa C....
A method for determining the loadings of organic and inorganic functional groups in size segregated ambient aerosol has been developed demonstrated. The uses a Hering Low Pressure Impactor (LPI), equipped with ZnSe impaction surfaces, to sample aerosol. samples are analyzed directly, without extraction, using transmission infrared spectroscopy. resulting spectra fractions used determine sulfate ion, nitrate aliphatic carbon, carbonyl organonitrate groups, calibration factors field model...
Using results from a nationally representative measurement campaign at 180 gathering compressor stations conducted with nine industry partners, this study estimated emissions for the U.S. sector, where sector-specific emission factors have not been previously available. The drew partner station population of 1705 stations-a significantly larger pool than was available prior studies. Data indicated that whole gas rates components on were comparable to or higher utilized by EPA's greenhouse...
ADVERTISEMENT RETURN TO ISSUEEditorialNEXTShaping Effective Practices for Incorporating Sustainability Assessment in Manuscripts Submitted to ACS Sustainable Chemistry & Engineering: Catalysis and Catalytic ProcessesDamien P. DebeckerDamien DebeckerMore by Damien Debeckerhttp://orcid.org/0000-0001-6500-2996, King Kuok (Mimi) HiiKing HiiMore Hiihttp://orcid.org/0000-0002-1163-0505, Audrey MooresAudrey MooresMore Mooreshttp://orcid.org/0000-0003-1259-913X, Liane M. RossiLiane RossiMore...
Global trade in liquefied natural gas (LNG) is growing significantly, as interest the life-cycle greenhouse (GHG) emissions associated with LNG. Most assessments of GHG from LNG have employed national or regional average emission estimates; however, there significant variability across different suppliers and supply chain. This work describes a framework for compiling supplier-specific data LNG, producing well to regasification at destination port. A case study presented Cheniere Energy's...