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Development Of Instrumentation For The Investigation Of Surface Regeneration For Candle Filters, Sean Patrick Gregory
Development Of Instrumentation For The Investigation Of Surface Regeneration For Candle Filters, Sean Patrick Gregory
Graduate Theses, Dissertations, and Problem Reports
Two methods of improving efficiency of coal based power generation are integrated gasification combined-cycle (IGCC) and pressurized fluidized-bed combustion (PFBC). Both of these options require high-temperature gas stream particle cleanup for optimum efficiency. Candle filters in a pressurized vessel have received the greatest amount of attention in dealing with this topic, but problems still persist and there does not seem to be clear-cut answer to the problem. This research is an investigation of the candle filter cleaning process, a process known as surface regeneration.;The objective of this research program has been to develop the instrumentation necessary to investigate the surface …
Characterization And Quality Of Soils Developing On A Mountaintop Removal Coal Mine, Kevin Alfred Thomas
Characterization And Quality Of Soils Developing On A Mountaintop Removal Coal Mine, Kevin Alfred Thomas
Graduate Theses, Dissertations, and Problem Reports
Mountaintop surface mining for coal has been practiced in West Virginia for over three decades, but its environmental impacts have become increasingly scrutinized in recent years. Therefore, this study evaluated soil development on different aged mined lands. Four different ages (2, 7, 11, and 23 years) of minesoils and two different slope classes, nearly level to gently sloping and steep to very steep, along with three contiguous native soils on a reclaimed mountaintop removal mine in Logan County, West Virginia were described and sampled. Standard analyses of physical and chemical properties were conducted in order to classify these soils. Some …
Development Of A Micro-Dilution Tunnel System For In-Use, On-Board Heavy-Duty Vehicle Particulate Matter Emissions Measurement, Emily Deanna Cirillo
Development Of A Micro-Dilution Tunnel System For In-Use, On-Board Heavy-Duty Vehicle Particulate Matter Emissions Measurement, Emily Deanna Cirillo
Graduate Theses, Dissertations, and Problem Reports
A novel portable particulate matter measuring system was designed, developed and qualified. The heavy-duty engine Federal Test Procedure (FTP) requires the use of a full-flow tunnel to measure particulate emissions from diesel fueled engines. However, a full-flow tunnel based constant volume sampler (CVS) system is not only expensive to build and maintain, it also requires a large work space. The portable micro-dilution system that could be used for measuring on-board, in-use emissions from heavy-duty vehicles would cost significantly less. The micro-dilution tunnel operates on the same principle as a full-flow dilution tunnel. The added advantage of the proposed design is …
Analysis Of Particulate Matter Concentration And Size Distribution In Heavy-Duty Vehicle Exhaust Emissions, Zhuyun Xu
Graduate Theses, Dissertations, and Problem Reports
This study put forward a method to predict the concentration field in the plume of a heavy-duty truck, operating at highway speed. It provided information regarding computation of dispersion coefficients in the area near a stack.;The numerical cumulative frequency fit method obtained in this study provided an effective and quick means for determining the particle size distribution parameters (the mass median aerodynamic diameters and geometric standard deviations) of sample data for the multi-modal distribution.;The particle size distribution of the compressed natural gas buses tested was characterized by a bi-modal particle size distribution; the clean diesel buses had a uni-modal particle …
Real World Heavy-Duty Vehicle Emissions Modeling, Paul Andrei
Real World Heavy-Duty Vehicle Emissions Modeling, Paul Andrei
Graduate Theses, Dissertations, and Problem Reports
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 Virginia University (WVU) has developed an extensive database of continuous transient gaseous emissions levels from a wide variety of heavy-duty vehicles in field operation. The database was built using WVU Transportable Heavy-Duty Vehicle Emissions Testing Laboratories (THDVETL). Several different transient cycles were utilized for testing including the Central Business District (CBD) schedule.;Several speed correction factors were developed …
Characterization Of Infield Vehicle Activity Data And Exhaust Emissions From Diesel Powered Off-Road Vehicles, Ryan Andrew Barnett
Characterization Of Infield Vehicle Activity Data And Exhaust Emissions From Diesel Powered Off-Road Vehicles, Ryan Andrew Barnett
Graduate Theses, Dissertations, and Problem Reports
A study was conducted to determine brake-specific emissions from diesel-powered off-highway heavy equipment that were exercised on steady-state and transient cycles. Two vehicles were evaluated in this study, a streetsweeper (114 hp) and a rubber-tired loader (110 hp). Due to the lack of appropriate transient cycles available for these vehicles, methods were developed to document infield operation for the creation of test cycles and strategies. These cycles were later used to mimic infield operation for the collection of emissions and performance data on a dynamometer test bed.;Brake-specific emissions data collected during the transient cycles was compared to data collected during …
Mitigation Of Water Quality And Ecosystem Impacts Of Roadway Construction Through Retrospective Engineering Analyses, Jaime Monique Sayre
Mitigation Of Water Quality And Ecosystem Impacts Of Roadway Construction Through Retrospective Engineering Analyses, Jaime Monique Sayre
Graduate Theses, Dissertations, and Problem Reports
During the construction of a segment of Appalachian Corridor H between Buckhannon and Elkins, West Virginia, mine spoils and land use features related to historic mining were disturbed. An assessment of the water quality, benthic macro invertebrates, and fish populations was conducted to ascertain the condition of the water and to assess the biological productivity of Laurel Run, a tributary of the Tygart Valley River which runs parallel to Corridor H. The water quality and biological impairments were attributed to the ineffective vegetation of the spoils pile, which permitted water infiltration and thus, served as a source of metals and …
Sorption Of Lead And Arsenic On Soil Components And Effectiveness Of Phosphates For Remediating Lead And Arsenic Contaminated Soils, Harjinder Sandhu
Sorption Of Lead And Arsenic On Soil Components And Effectiveness Of Phosphates For Remediating Lead And Arsenic Contaminated Soils, Harjinder Sandhu
Graduate Theses, Dissertations, and Problem Reports
High concentration of trace elements such as arsenic (As) and lead (Pb) represents one of the potentially costly threats to water and soil resources as well as serious threats to humans. Clay minerals are potential binding agents for pollutants due to their high cation exchange capacity and large surface area. Laboratory investigations were undertaken to evaluate the effect of Fe and Al hydrous oxide coatings on the sorption of Pb and As. Four clay minerals attapulgite, illite, kaolinite and montmorillonite with a range of surface characteristics were selected to investigate the Pb and As sorption. The minerals were coated with …
Evaluation Of Exhaust Flowrate Measurement Techniques For A Mobile Emissions Monitoring System, Eric Todd Meyer
Evaluation Of Exhaust Flowrate Measurement Techniques For A Mobile Emissions Monitoring System, Eric Todd Meyer
Graduate Theses, Dissertations, and Problem Reports
West Virginia University designed and developed Mobile Emissions Monitoring System (MEMS) for the six settling Heavy-Duty Diesel Engine (S-HDDE) manufacturers. The MEMS measures emissions concentrations while operating in a real world environment. The best method for measuring the emissions concentrations was found to be through raw exhaust sampling. In order to properly calculate the emissions concentrations the total exhaust flowrate through the engine must be determined. The devices evaluated were an Annubar, an Accutube, a hot film anemometer, a Pitot static tube, a venturi, and a vortex shedder.;The evaluation of the devices was broken down into two parts, the first …
Evaluating Heavy-Duty Diesel Engine Aftertreatment Devices With A Split Exhaust Configuration, Eric Roy Corrigan
Evaluating Heavy-Duty Diesel Engine Aftertreatment Devices With A Split Exhaust Configuration, Eric Roy Corrigan
Graduate Theses, Dissertations, and Problem Reports
West Virginia University evaluated diesel oxidation catalysts (DOC) and lean-NOx catalysts as part of the Diesel Emissions Control-Sulfur Effects (DECSE) program. In order to perform thermal aging of the DOC and lean-NOx catalysts simultaneously and economically, each catalyst was sized to accommodate half of the engine exhaust flow. Simultaneous catalyst aging was then achieved by splitting the engine exhaust into two streams such that approximately half of the total exhaust flowed through the DOC and half through the lean-NOx catalyst. This necessitated splitting the engine exhaust into two streams during emissions measurements. The fraction of exhaust entering the measurement system …
Design And Evaluation Of The Emissions Measurement Components For A Heavy-Duty Diesel-Powered Vehicle Mobile Emissions Measurement System (Mems), Wesley Clark Riddle
Design And Evaluation Of The Emissions Measurement Components For A Heavy-Duty Diesel-Powered Vehicle Mobile Emissions Measurement System (Mems), Wesley Clark Riddle
Graduate Theses, Dissertations, and Problem Reports
The objective of this study was the design, construction, and preliminary qualification of the Mobile Emissions Measurement System (MEMS) for in-use, on-road testing of heavy-duty diesel-powered vehicles. This included selection of emissions analyzers and sampling system components capable of producing emissions results of similar accuracy to those attained with laboratory-grade instruments. A thorough investigation of commercially available systems, and a literature review, identified no suitable designs. Therefore, a complete emissions measurement system, designed specifically for the testing of heavy-duty diesel powered vehicles, was developed using available components.;The candidate analyzers that performed successfully during bottled gas bench tests were then incorporated …