A5045721168- Atmospheric and Environmental Gas Dynamics
- Oil, Gas, and Environmental Issues
- Advanced Polymer Synthesis and Characterization
- Combustion and Detonation Processes
- Air Quality Monitoring and Forecasting
- Polymer Nanocomposites and Properties
- Indoor Air Quality and Microbial Exposure
- Block Copolymer Self-Assembly
- Spectroscopy and Laser Applications
- Recycling and Waste Management Techniques
- Rocket and propulsion systems research
- Conservation Techniques and Studies
- Smart Materials for Construction
- Air Quality and Health Impacts
- Polymer crystallization and properties
- Water Quality and Pollution Assessment
- Atmospheric chemistry and aerosols
- Theoretical and Computational Physics
- Soil and Water Nutrient Dynamics
- Vehicle emissions and performance
- Manufacturing Process and Optimization
- Polymer composites and self-healing
- Water Quality and Resources Studies
- Catalytic Cross-Coupling Reactions
- CO2 Sequestration and Geologic Interactions
Pennsylvania State University
2017-2023
Center for Environmental Health
2013-2022
Park University
2020
The University of Texas at Austin
1998-2018
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...
A series of full-scale industrial flare tests were conducted at low flow and BTU content flared gases an test facility. Both a 24" diameter air-assisted with capacity 144,000 lb/h 36" steam-assisted 937,000 employed in the testing. Flared mixtures natural gas, propylene, nitrogen or propane, nitrogen. Natural gas to propane propylene ratio was 1:4 by volume for all experiments. Nitrogen used as diluent achieve desired lower heating values (LHV) vent gas. The range rates 0.1% 0.65% flare's...
Full-scale tests of steam- and air-assisted industrial flares were conducted using low BTU content (lower heating value) vent gases at flow rates. A 36″ diameter steam-assisted flare with a capacity 937,000 lb/h 24″ 144,000 pounds per hour operated mixtures natural gas, propylene, nitrogen or propane, rates less than 1% maximum flow. Combustion efficiency (percentage the flared converted to carbon dioxide water) ranged from 50% more 99%. For flare, combustion (CE) steam-to-vent gas ratios...
Alkene dicarbofunctionalization is a rapidly emerging tool for complex molecule synthesis that installs two carbon fragments regioselectively across an alkene. This method has the potential to engineer stereodefined polymers, yet application of difunctionalization reactions polymer remains unexplored. Herein, we describe first example Ni-catalyzed alkenes with arylboronic esters and aryl bromides innate The polymerization reaction proceeds addition bromide terminal alkenyl ester internal...
Full scale flare tests have been conducted to test the impacts of operating conditions on fraction flared gases that are converted carbon dioxide and water (combustion efficiency, CE) for flares combusting low heating value (∼350–600 BTU/scf) at flow rates (∼0.1–0.25% maximum flow). Flares produce lower flame temperatures when with combustion efficiencies than high efficiencies. This leads reduced formation nitrogen oxides (NOx) in flame. For a series under conditions, gases, NOx emission...
The simultaneous use of nonequilibrium reaction processing and complex macromolecular architecture is an exciting way to achieve nanostructures that are not easily accessible via standard static block polymer self-assembly. Previous work has shown the polymerization styrene in presence a poly(styrene)-block-poly(butadiene) (PS-PBD) diblock copolymer induces nanostructural transition from lamellar (LAM) hexagonally packed cylinder (HEX) morphology. was found be driven by situ PS grafting PBD...
The destruction and removal efficiency (DRE) computation of target hydrocarbon species in the flaring process is derived using carbon balance methodologies. This analysis approach applied to data acquired during Texas Commission on Environmental Quality 2010 Flare Study. Example DRE calculations are described discussed. Carbon achieved within 2% for flare vent gases. Overall method uncertainty evaluated examined together with apparent variability combustion performance. Using fast response...
A magnetic, metallic inverse opal fabricated by infiltration into a silica nanosphere template assembled from spheres with diameters less than 100 nm is an archetypal example of "metalattice". In traditional quantum confined structures such as dots, wires, and thin films, the physical dynamics in free dimensions typically largely decoupled behavior confining directions. metalattice, extended degrees freedom cannot be separated. Modeling predicts that magnetic metalattices should exhibit...
Control of nanoparticle dispersion within a polymer matrix is critical consideration when designing solid state hybrid polymer/inorganic materials. Polymer-functionalized nanoparticles are effective components for increasing particle miscibility in matrices. Entropic and enthalpic contributions to the polymer-functionalized well-understood have been used extensively enhance However, systems immiscible graft chains remain understudied, part due challenges associated with mixing unlike...
Four new vehicles were tested to assess the nature (constituents and concentrations) of volatile organic compounds (VOCs) associated with vehicle interiors. The total VOC (TVOC) concentration within interior one (minivan) was 7,500 μg/m3 on first day sampling (second after purchase), approximately two orders magnitude higher than outdoor TVOC concentration. in minivan observed decay significantly time, an approximate 90% reduction three weeks testing. other had concentrations that ranged...
Abstract. Four solar-powered methane sensing systems with remote communication capabilities were tested for nine months at an oil and gas production site in west Texas. Sensor performance was evaluated using single blind certified challenges by comparison a continuously operated quantum cascade tunable infrared laser differential absorption spectrometer (QC-TILDAS) system. Dispersion modelling used to estimate concentrations that would need be detected identify continuous intermittent...
<italic>In situ</italic> polymer grafting from the mid-block of an ABA triblock copolymer leads to morphology transitions and enhanced mechanical properties.
Air-assisted flares, operating under low flow conditions (<1% of maximum flow) with BTU gases, have relatively narrow bands air-to-vent gas ratios that can achieve destruction and removal efficiencies (DREs, fraction waste gases destroyed by complete incomplete combustion) greater than 98%. If blower configurations are not able to operate within these bands, emissions may be those predicted based on 98% DRE, but if air-assist rates finely tuned, much lower assuming DRE achievable. This work...
It has been postulated that recycling end-of-life computers and related components partially offsets the energy requirements of newly manufactured computers. This benefit can arise from 1) refurbishing reselling systems; 2) “cannibalizing” their high-grade parts such as sheet steel aluminum,' 3) primary material source reduction through true clean separated metals, plastics, glass. research program undertook an effort to study quantify this hypothesis.
It has been postulated that recycling EOL computers and related components partially offsets the energy requirements of newly manufactured computers. This benefit can arise from 1) refurbishing reselling systems, 2) "cannibalizing" their highgrade parts such as sheet steel aluminum, 3) primary material source reduction through true clean separated metals, plastics, glass. research program undertook an effort to study quantify this hypothesis.
Abstract Controlled laboratory experiments were conducted to measure highly reactive volatile organic compounds (VOCs) in industrial cooling waters using four different sampling methods. The methods included collection of samples from the exhaust air El Paso column Summa® canisters and Tedlar™ bags, water flow immediately prior entering analysis vials 0.5‐L Tedlar bags. Collected analyzed standard techniques. Relative accuracies involving bags greater than 20%. gas Summa less 20% when...