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Thermochemistry of 2-amino-3-quinoxalinecarbonitrile-1, 4-dioxide. Evaluation of the mean dissociation enthalpy of the (N-O) bond

Description: Article on the thermochemistry of 2-amino-3-quinoxalinecarbonitrile-1,4-dioxide and an evaluation of the mean dissociation enthalpy of the (N-O) bond.
Date: August 10, 2004
Creator: Silva, Maria D. M. C. Ribeiro da; Gomes, José R. B.; Gonçalves, Jorge M.; Sousa, Emanuel A.; Pandey, Siddharth & Acree, William E. (William Eugene)
Partner: UNT College of Arts and Sciences

Intercontinental Transport of Air Pollution: Relationship to North American Air Quality. A Review of Federal Resarch and Future Needs

Description: This government report describes pollutants which are carried between continents by air currents. The report also addresses current and future research to better understand how these pollutants are transported.
Date: April 2001
Creator: National Science and Technology Council (U.S.). Air Quality Research Subcommittee.
Partner: UNT Libraries

FY-2001 Accomplishments in Off-gas Treatment Technology Development

Description: This report summarizes the efforts funded by the Tank Focus Area to investigate nitrogen oxide (NOx) destruction (a.k.a. deNOx) technologies and off-gas scrubber system designs. The primary deNOx technologies that were considered are staged combustion (a.k.a. NOx reburning), selective catalytic reduction, selective non-catalytic reduction, and steam reformation. After engineering studies and a team evaluation were completed, selective catalytic reduction and staged combustion were considered the most likely candidate technologies to be deployed in a sodium-bearing waste vitrification facility. The outcome of the team evaluation factored heavily in the establishing a baseline configuration for off-gas and secondary waste treatment systems.
Date: September 1, 2001
Creator: Marshall, Douglas William
Partner: UNT Libraries Government Documents Department

Tier 2 Useful Life (120,000 miles) Exhaust Emission Results for a NOx Adsorber and Diesel Particle Filter Equipped Light-Duty Diesel Vehicle

Description: Investigates the emission control system performance and system desulfurization effects on regulated and unregulated emissions in a light-duty diesel engine.
Date: May 1, 2006
Creator: Tatur, M.; Tomazic, D.; Thornton, M.; Orban, J. & Slone, E.
Partner: UNT Libraries Government Documents Department

Final Report on the Clean Energy/Air Quality Integration Initiative Pilot Project of the U.S. Department of Energy's Mid-Atlantic Regional Office

Description: The MARO pilot project represents the first effort in the country to seek to obtain credit under a Clean Air Act (CAA) State Implementation Plan (SIP) for nitrogen oxide (NOx) emission reductions.
Date: August 1, 2006
Creator: Jacobson, D.; O'Connor, P.; High, C. & Brown, J.
Partner: UNT Libraries Government Documents Department

Comparison of Three Bed Packings for the Biological Removal of Nitric Oxide from Gas Streams

Description: Environmental and health issues coupled with increasingly stringent nitrogen oxide (NOx) emission standards indicates a need for the development of alternative low-cost technologies for the removal of NOx from gas streams. Biological NOx conversion offers promise as a novel treatment method. Thermophilic denitrifying bacteria indigenous to composts and soils are capable of converting NOx to environmentally benign nitrogen via a dissimilatory reductive pathway. The present study compares the performance of three bioreactor packing materials (compost, perlite, and biofoam) for the removal of nitric oxide (NO) from a simulated wet-scrubbed combustion gas. Although all three materials performed well (>85% NO removal) at residence times of 70-80 seconds, the compost performed better than the other materials at shorter residence times (13-44 seconds). The perlite and biofoam materials, however, both offer long-term thermal stability and lower pressure drop compared with compost. The feasibility of biological NOx conversion processes will depend on the combined factors of NOx removal ability and pressure drop. The results presented here suggest that the compost, perlite and biofoam systems, subject to further optimization, offer potential for the biological removal of NOx from gas streams.
Date: October 1, 2000
Creator: Lee, Brady Douglas; Flanagan, W. P.; Barnes, Charles Marshall; Barrett, Karen B.; Zaccardi, Larry Bryan & Apel, William Arnold
Partner: UNT Libraries Government Documents Department

Impacts of Wind and Solar on Fossil-Fueled Generators: Preprint

Description: High penetrations of wind and solar power will impact the operations of the remaining generators on the power system. Regional integration studies have shown that wind and solar may cause fossil-fueled generators to cycle on and off and ramp down to part load more frequently and potentially more rapidly. Increased cycling, deeper load following, and rapid ramping may result in wear-and-tear impacts on fossil-fueled generators that lead to increased capital and maintenance costs, increased equivalent forced outage rates, and degraded performance over time. Heat rates and emissions from fossil-fueled generators may be higher during cycling and ramping than during steady-state operation. Many wind and solar integration studies have not taken these increased cost and emissions impacts into account because data have not been available. This analysis considers the cost and emissions impacts of cycling and ramping of fossil-fueled generation to refine assessments of wind and solar impacts on the power system.
Date: August 1, 2012
Creator: Lew, D.; Brinkman, G.; Kumar, N.; Besuner, P.; Agan, D. & Lefton, S.
Partner: UNT Libraries Government Documents Department

Biofuels News, Vol. 2, Issue 3, Summer 99

Description: The focus of this Biofuels News is biodiesel. Biodiesel is a domestically produced renewable fuel that is made by reacting alcohol (usually methanol or ethanol) with vegetable oils, animal fats, or recycled cooking greases. It can be used neat (pure) or in blends (the most popular is 20% biodiesel blend) with any type of diesel fuel.
Date: September 1, 1999
Creator: Woodward, S.
Partner: UNT Libraries Government Documents Department