Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 26 for “"gaseous emissions"”.
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Comparison of Fuel Economy and Gaseous Emissions of Gas-Direct Injection versus Port-Fuel Injection Light Duty Vehicles Based on Real-World Measurements.
North Carolina State University Theses Civil Engineering.
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Emissions testing of two recreational marine engines with water contact in the exhaust stream
… engine was tested without exhaust scrubbing. Gaseous emissions (HC, NOx, CO, and CO2) from the engines were continuously measured using a constant volume sampling system. Both exhaust gas and cooling water samples were collected and speciated for hydrocarbon species present. In addition, …
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A Study of the Intermediate-Range Transport of Secondary Acidic Species
… acidic species formed from the transformation of gaseous emissions over an intermediate-range (100-200 km) by: (1) Selection, design and calibration of an instrument to separate submicron atmospheric particles, (2) Field sampling and chemical analyses of submicron particles to obtain elemental and …
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Nitrogen Fate and Transformations in the Production of Containerized Specialty Crops
… in adverse environmental impacts related to N gaseous and aqueous emissions from containers on the production site. Growers are responsible for optimizing nutrient usage in crop production. Three studies were conducted to investigate and better understand the fate of applied N fertilizers, the …
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Real world heavy-duty vehicle emissions modeling
Heavy-duty vehicle emissions represent a significant portion of the mobile source emissions inventory. Accurate estimation of their contribution is essential as on-highway and non-road heavy-duty diesel emissions account for at least one third of the oxides of nitrogen (NOx) in the inventory. West …
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Characterization of in-use emissions from marine engines
Recently, exhaust emissions from marine engines have become a cause of growing concern. Emission reduction technologies applicable to marine engines need to be developed and tested so that the emission regulations can be met. A review of emission reduction technologies applicable for marine engines …
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Effect of driving cycles on the particulate mass and number emissions from in-use heavy heavy-duty diesel vehicles
… University's Transportable Heavy Duty Vehicle Emissions Testing Laboratory located at Riverside, California. Five vehicles were selected to cover a wide range of model year from 1989 to 2004. All five vehicles were subjected to chemical speciation and analysis conducted by Desert Research …
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Heavy-duty emissions inventory and prediction
Heavy duty vehicle emissions represent a significant portion of the mobile source emissions inventory. Accurate estimation of their contribution is essential as on-highway and non-road heavy duty diesel emissions account for at least one third of the oxides of nitrogen (NOx) in the inventory. West …
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Effectof feed rations on livestock performance and impact of effective microorganisms on litter odour and other gases emissions.
… on litter type odour and other gaseous emissions. It was hypothesized that diet type and EM would not livestock litter odour and gaseous emissions. Experimental chapter one and two investigate the effect of feed type and effective microorganisms on performance and litter odour …
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Impact of the Tsumeb smelter waste on plant species diversity and structure in Tsumeb, north-central Namibia
… important sources of contamination are solid and gaseous emissions from the Tsumeb Smelter, airborne particles from the Tsumeb tailings pond and airborne particles from slag mill waste. Six sites: Inside Smelter Site, Outside Smelter Site, Abattoir Hill Site, Transnamib Site, Nomtsoub Site and …
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Energy ans exergy analysis of biomass co-firing in pulverized coal power generation
… of biomass cofiring on system performance and gaseous emissions of CO2, NOx, and SOx. The power generation system considered is a typical pulverized coal-fired steam cycle system, while four biomass fuels (rice husk, pine sawdust, chicken litter, and refuse derived fuel) and two coals …
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The Development of a Monitoring and Control System for a Pulverised Coal-Fire Burner Using Neural Network Approach
… conditions were obtained. The infrared emissions from the flame, the combustion noise and the acoustic emission generated in the burner body were measured with appropriate sensors, as were the fuel and airflow rates and pollutant emissions. The signals from the sensors were analysed …
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Physical chemical processes and environmental impacts associated with home composting
… The focus of the work was climate relevant gaseous emissions, and developing and utilising a methodology for quantifying them. Experiments using 220L open bottomed home compost bins, alongside purpose built 200L composting reactors with airflow control were performed. A variety of composting …
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A history of Maamba coal mine and its socio-economic impact on Zambia, 1968-2010.
… had an adverse impact on the environment. Gaseous emissions caused lung diseases such as pulmonary tuberculosis and other respiratory infections. Water pollution in turn negatively affected human, livestock and agricultural activities. This study concludes that despite its negative impact …
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Comprehensive evaluation of cow dung digestate composition for potential soil fertilization: Advanced analytical techniques
… for optimized composting strategies to minimize gaseous emissions. This study establishes CDD as a scientifically validated biofertilizer that reduces reliance on synthetic fertilizers while enhancing soil health, microbial diversity, and crop productivity. However, precise application protocols …
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Economics of using biomass electric power for energy application of light commercial building
… can significantly reduce the payback period. The gaseous emissions from the use of producer gas is very low compared to the emissions from the use of coal or natural gas resources and therefore use of the biomass resources through the investigated gasifier technology is extremely environment …
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Impact of Indoor Sources of Emission on Ambient Air Quality
Indoor organic emissions are crucial regarding public health and air quality concerns. Many indoor emissions stem from solvent evaporation of volatile chemical products (VCPs), a broad class of sources emerging as a significant contributor to urban air pollution as emissions from classic sources …
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The Geochemistry of Selenium and Sulfur in a Coastal Salt Marsh
… of selenium from the marsh sediment is either gaseous emissions of selenium or the flux of <em>Spartina alterniflora</em> litter from the marsh system. Gaseous selenium is a potentially important source of selenium to the atmosphere.</p>
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Electro-aerodynamic thrust for fixed-wing aircraft propulsion
… no on-board propellant and has zero primary gaseous emissions. In addition, thrust generation has the potential to be nearly silent and requires no moving parts. Despite these advantages, however, EAD propulsion has yet to be implemented in fixed-wing aircraft, in part due to the limited …
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Experimental Investigation And Development Of An Extended Two Color Method (etcm) With Application To Internal Combustion Engines
… continuous path of improvement to reduce exhaust gaseous emissions and improve fuel economy. While recent trends in diesel engine development have lowered the EGR requirements, future regulatory pressure will likely result in a reversed trend in the future. </p> <p>Given this, it is of interest to …
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