A5007007271- Air Quality and Health Impacts
- Vehicle emissions and performance
- Atmospheric chemistry and aerosols
- Combustion and flame dynamics
- Advanced Combustion Engine Technologies
- Energy and Environment Impacts
- Hybrid Renewable Energy Systems
- Air Quality Monitoring and Forecasting
- Nuclear Physics and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Various Chemistry Research Topics
- Rocket and propulsion systems research
- Electric Vehicles and Infrastructure
- Chemical Thermodynamics and Molecular Structure
- Wind and Air Flow Studies
- Atmospheric Ozone and Climate
- Advanced Battery Technologies Research
- Fire dynamics and safety research
Environmental Protection Agency
2011-2024
Research Triangle Park Foundation
2014-2024
North Carolina State University
2008-2012
Realistic metrics and methods for testing household biomass cookstoves are required to develop standards needed by international policy makers, donors, investors. Application of consistent test practices allows emissions energy efficiency performance be benchmarked enables meaningful comparisons among traditional advanced stove types. In this study, 22 burning six fuel types (wood, charcoal, pellets, corn cobs, rice hulls, plant oil) at two moisture levels were examined under...
Real-time aerosol black carbon (BC) data, presented at time resolutions on the order of seconds to minutes, is desirable in field and source characterization studies measuring rapidly varying concentrations BC. The Optimized Noise-reduction Averaging (ONA) algorithm has been developed post-process data from Aethalometer, one widely used real-time BC instruments. ONA program conducts adaptive time-averaging with incremental light attenuation (∆ATN) through instrument's internal filter...
Black carbon (BC) is a primary particle matter component emitted as result of incomplete combustion. Due to its light-absorbing nature, BC can exert both direct and indirect influence on global climate. There no universal research or regulatory definition BC; instead, variety instruments analytical methods define operationally. This study used constant, source-generated concentration in order quantify the variation measurements using 10 different methodologies. Instruments examined include...
Gaseous and particulate emissions from the combustion of coal have been associated with adverse effects on human environmental health, for that reason subject to regulation by federal state governments. Recent regulations United States Environmental Protection Agency further restricted acid gases electricity generating facilities other industrial facilities, upcoming deadlines are forcing industry consider both pre- post-combustion controls maintain compliance. As a result these recent...
Smoke point measurements of diluted methane and ethylene flames were made in a co-flowing laminar jet diffusion flame at pressures up to 8 atm. The smoke corresponds the fuel flow rate where soot production is exactly offset by oxidation, as such sensitive changes rates or oxidation. Flame height these was measured function pressure, diluent, dilution level well both exit velocity profile (i.e., plug parabolic) fuel/air ratio. As pressure increases, became less diluent level. In addition...
Particulate matter (PM) originating from diesel combustion is a public health concern due to its association with adverse effects on respiratory and cardiovascular diseases lung cancer. This study investigated emissions three stationary engines (gensets) varying power output (230 kW, 400 600 kW) at 50% 90% load determine concentrations of gaseous (GROS) PM reactive oxygen species (PMROS). In addition, the influence modern emission control technologies ROS was evaluated: active passive...