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Functionally Graded Cathodes for Solid Oxide Fuel Cells

Description: One primary suspected cause of long-term performance degradation of solid oxide fuels (SOFCs) is the accumulation of chromium (Cr) species at or near the cathode/electrolyte interface due to reactive Cr molecules originating from Cr-containing components (such as the interconnect) in fuel cell stacks. To date, considerable efforts have been devoted to the characterization of cathodes exposed to Cr sources; however, little progress has been made because a detailed understanding of the chemistry … more
Date: December 31, 2006
Creator: Abernathy, Harry & Liu, Meilin
Partner: UNT Libraries Government Documents Department
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Attrition Resistant Iron-Based Catalysts For F-T SBCRs

Description: The Fischer-Tropsch (F-T) reaction provides a way of converting coal-derived synthesis gas (CO+ H{sub 2}) to liquid fuels. Since the reaction is highly exothermic, one of the major problems in control of the reaction is heat removal. Recent work has shown that the use of slurry bubble column reactors (SBCRs) can largely solve this problem. The use of iron-(FE) based catalysts is attractive not only due to their low cost and ready availability, but also due to their high water-gas shift activity… more
Date: January 31, 2006
Creator: Adeyiga, Adeyinka A.
Partner: UNT Libraries Government Documents Department
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Advanced Measurement and Modeling Techniques for Improved SOFC Cathodes

Description: The goal of this project was to develop an improved understanding of factors governing performance and degradation of mixed-conducting SOFC cathodes. Two new diagnostic tools were developed to help achieve this goal: (1) microelectrode half-cells for improved isolation of cathode impedance on thin electrolytes, and (2) nonlinear electrochemical impedance spectroscopy (NLEIS), a variant of traditional impedance that allows workers to probe nonlinear rates as a function of frequency. After report… more
Date: December 31, 2006
Creator: Adler, Stuart; Dunyushkina, L.; Huff, S.; Lu, Y. & Wilson, J.
Partner: UNT Libraries Government Documents Department
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TASK TECHNICAL AND QUALITY ASSURANCE PLAN FOR OUT-OF-TANK DESTRUCTION OF TETRAPHENYLBORATE VIA WET AIR OXIDATION TECHNOLOGY: PHASE I - BENCH SCALE TESTS

Description: Tank 48H return to service is critical to the processing of high level waste (HLW) at Savannah River Site (SRS). Liquid Waste Disposition (LWD) management has the goal of returning Tank 48H to routine service by January 2010 or as soon as practical. Tank 48H currently holds legacy material containing organic tetraphenylborate (TPB) compounds from the operation of the In-Tank Precipitation process. This material is not compatible with the waste treatment facilities at SRS and must be removed or … more
Date: March 31, 2006
Creator: Adu-Wusu, K
Partner: UNT Libraries Government Documents Department
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Crack growth rates of nickel alloy welds in a PWR environment.

Description: In light water reactors (LWRs), vessel internal components made of nickel-base alloys are susceptible to environmentally assisted cracking. A better understanding of the causes and mechanisms of this cracking may permit less conservative estimates of damage accumulation and requirements on inspection intervals. A program is being conducted at Argonne National Laboratory to evaluate the resistance of Ni alloys and their welds to environmentally assisted cracking in simulated LWR coolant environm… more
Date: May 31, 2006
Creator: Alexandreanu, B.; Chopra, O. K.; Shack, W. J. & Technology, Energy
Partner: UNT Libraries Government Documents Department
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Modeling Brine-Rock Interactions in an Enhanced Geothermal System Deep Fractured Reservoir at Soultz-Sous-Forets (France) - A Joint Approach Using Two Geochemical Codes: Frachem and Toughreact

Description: The modeling of coupled thermal, hydrological, and chemical (THC) processes in geothermal systems is complicated by reservoir conditions such as high temperatures, elevated pressures and sometimes the high salinity of the formation fluid. Coupled THC models have been developed and applied to the study of enhanced geothermal systems (EGS) to forecast the long-term evolution of reservoir properties and to determine how fluid circulation within a fractured reservoir can modify its rock properties.… more
Date: December 31, 2006
Creator: Andre, Laurent; Spycher, Nicolas; Xu, Tianfu; Vuataz, Francois-D. & Pruess, Karsten
Partner: UNT Libraries Government Documents Department
open access

Advanced Gasification By-Product Utilization

Description: With the passing of legislation designed to permanently cap and reduce mercury emissions from coal-fired utilities, it is more important than ever to develop and improve upon methods of controlling mercury emissions. One promising technique is carbon sorbent injection into the flue gas of the coal-fired power plant. Currently, this technology is very expensive as costly commercially activated carbons are used as sorbents. There is also a significant lack of understanding of the interaction betw… more
Date: August 31, 2006
Creator: Andrews, Rodney; Rubel, Aurora; Groppo, Jack; Marrs, Brock; Geertsema, Ari; Huggins, Frank et al.
Partner: UNT Libraries Government Documents Department
open access

Field Demonstration of a High-Efficiency Packaged Rooftop Air Conditioning Unit at Fort Gordon, Augusta, GA

Description: As part of a larger program targeting the market transformation of packaged rooftop air conditioning, five high-efficiency rooftop air conditioning products were selected in 2002 by the U.S. Department of Energy (DOE) under the Unitary Air Conditioner (UAC) Technology Procurement (http://www.pnl.gov/uac). In February 2003, Fort Gordon in Augusta, Georgia was chosen as the demonstration site. With the goal of validating the field performance and operation of one of the awarded products, a 10-ton… more
Date: March 31, 2006
Creator: Armstrong, Peter R.; Sullivan, Gregory P. & Parker, Graham B.
Partner: UNT Libraries Government Documents Department
open access

Next Generation Engineered Materials for Ultra Supercritical Steam Turbines

Description: To reduce the effect of global warming on our climate, the levels of CO{sub 2} emissions should be reduced. One way to do this is to increase the efficiency of electricity production from fossil fuels. This will in turn reduce the amount of CO{sub 2} emissions for a given power output. Using US practice for efficiency calculations, then a move from a typical US plant running at 37% efficiency to a 760 C /38.5 MPa (1400 F/5580 psi) plant running at 48% efficiency would reduce CO2 emissions by 17… more
Date: May 31, 2006
Creator: Arrell, Douglas
Partner: UNT Libraries Government Documents Department
open access

Measurement of Branching Fractions in Radiative BDecays to eta K gamma and Search for B Decays to eta' K gamma

Description: The authors present measurements of the B {yields} {eta}K{gamma} branching fractions and upper limits for the B {yields} {eta}'K{gamma} branching fractions. For B{sup +} {yields} {eta}K{sup +}{gamma} they also measure the time-integrated charge asymmetry. The data sample, collected with the BABAR detector at the Stanford Linear Accelerator Center, represents 232 x 10{sup 6} produced B{bar B} pairs. The results for branching fractions and upper limits at 90% C.L. in units of 10{sup -6} are: {Bet… more
Date: March 31, 2006
Creator: Aubert, B.
Partner: UNT Libraries Government Documents Department
open access

Search for T, CP and CPT Violation in B0-B0bar Mixingwith Inclusive Dilepton Events

Description: The authors report the results of a search for T, CP and CPT violation in B{sup 0}-{bar B}{sup 0} mixing using an inclusive dilepton sample collected by the BABAR experiment at the PEP-II B Factory. Using a sample of 232 million B{bar B} pairs, with a simultaneous likelihood fit of the same-sign and opposite-sign dileptons, they measure the T and Cp violation parameter |q/p|-1 = (-0.8 {+-} 2.7(stat.) {+-} 1.9(syst.)) x 10{sup -3}, and the CPT and CP parameters Im z = (-13.9 {+-} 7.3(stat.) {+-}… more
Date: March 31, 2006
Creator: Aubert, B.
Partner: UNT Libraries Government Documents Department
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Beam Intensity Expectations for a 200 Mev/U 400 KW Radioactive Beam Driver Accelerator.

Description: The expected radioactive ion production rate for a 200 MeV/u 400 kW driver linac using four different production methods is discussed. For each isotope the optimum method is identified and the rate is calculated based on different model assumptions, empirical observation and extrapolations. The results are compared to the rates expected for a 550 MeV proton driver machine with a beam power of 50 kW, as well as the full RIA facility with a 400 MeV/u 400 kW production linac.
Date: December 31, 2006
Creator: Back, B. B.; Jiang, C. L. & Physics
Partner: UNT Libraries Government Documents Department
open access

Corrosion of Metal Inclusions In Bulk Vitrification Waste Packages

Description: The primary purpose of the work reported here is to analyze the potential effect of the release of technetium (Tc) from metal inclusions in bulk vitrification waste packages once they are placed in the Integrated Disposal Facility (IDF). As part of the strategy for immobilizing waste from the underground tanks at Hanford, selected wastes will be immobilized using bulk vitrification. During analyses of the glass produced in engineering-scale tests, metal inclusions were found in the glass produc… more
Date: July 31, 2006
Creator: Bacon, Diana H.; Pierce, Eric M.; Wellman, Dawn M.; Strachan, Denis M. & Josephson, Gary B.
Partner: UNT Libraries Government Documents Department
open access

Abandoned Mine Reclamation Fee on Coal

Description: This report summarizes the problems that surround the Abandoned Mine Reclamation Fund or Abandoned Mine Land (AML) Fund. This report also includes information on the history of the fund and fees, such as congress extending the fees it imposes six times. Nevertheless, one of the central problems in the report is extending the fees further.
Date: August 31, 2006
Creator: Bamberger, Robert L.
Partner: UNT Libraries Government Documents Department
open access

Oxygen Transport Ceramic Membranes

Description: Ti doping on La{sub 1-x}Sr{sub x}FeO{sub 3-{delta}} (LSF) tends to increase the oxygen equilibration kinetics of LSF in lower oxygen activity environment because of the high valence state of Ti. However, the addition of Ti decreases the total conductivity because the acceptor ([Sr{prime}{sub La}]) is compensated by the donor ([Ti{sub Fe}{sup {sm_bullet}}]) which decreases the carrier concentration. The properties of La{sub 0.2}Sr{sub 0.8}Fe{sub 1-x}Ti{sub x}O{sub 3-{delta}} (LSFT, x = 0.45) hav… more
Date: December 31, 2006
Creator: Bandopadhyay, S. & Nithyanantham, T.
Partner: UNT Libraries Government Documents Department
open access

Clean Coal Power Initiative

Description: This report is the fifth quarterly Technical Progress Report submitted by NeuCo, Incorporated, under Award Identification Number, DE-FC26-04NT41768. This award is part of the Clean Coal Power Initiative (''CCPI''), the ten-year, $2B initiative to demonstrate new clean coal technologies in the field. This report is one of the required reports listed in Attachment B Federal Assistance Reporting Checklist, part of the Cooperative Agreement. The report covers the award period January 1, 2006 - Marc… more
Date: March 31, 2006
Creator: Bartlett, Doug; James, Rob; McDermott, John; Parikh, Neel; Patnaik, Sanjay & Podowski, Camilla
Partner: UNT Libraries Government Documents Department
open access

BSE (“Mad Cow Disease”): A Brief Overview

Description: This report provides background on appearance of BSE(bovine spongiform encephalopathy or "mad cow disease") in North America.
Date: January 31, 2006
Creator: Becker, Geoffrey S.
Partner: UNT Libraries Government Documents Department
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Flat Tax Proposals and Fundamental Tax Reform: An Overview

Description: This report discusses the idea of replacing our current income tax system with a flat-rate tax, including background and analysis and various Congressional proposals.
Date: May 31, 2006
Creator: Bickley, James M.
Partner: UNT Libraries Government Documents Department
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Fixed Bed Biomass Gasifier

Description: The report details work performed by Gazogen to develop a novel biomass gasifier for producimg electricity from commercially available hardwood chips. The research conducted by Gazogen under this grant was intended to demonstrate the technical and economic feasibility of a new means of producing electricity from wood chips and other biomass and carbonaceous fuels. The technical feasibility of the technology has been furthered as a result of the DOE grant, and work is expected to continue. The e… more
Date: March 31, 2006
Creator: Bielenberg, Carl
Partner: UNT Libraries Government Documents Department
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Multi-Site Application of the Geomechanical Approach for Natural Fracture Exploration

Description: In order to predict the nature and distribution of natural fracturing, Advanced Resources Inc. (ARI) incorporated concepts of rock mechanics, geologic history, and local geology into a geomechanical approach for natural fracture prediction within mildly deformed, tight (low-permeability) gas reservoirs. Under the auspices of this project, ARI utilized and refined this approach in tight gas reservoir characterization and exploratory activities in three basins: the Piceance, Wind River and the An… more
Date: March 31, 2006
Creator: Billingsley, R. L. & Kuuskraa, V.
Partner: UNT Libraries Government Documents Department
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AgraPure Mississippi Biomass Project

Description: The AgraPure Mississippi Biomass project was a congressionally directed project, initiated to study the utilization of Mississippi agricultural byproducts and waste products in the production of bio-energy and to determine the feasibility of commercialization of these agricultural byproducts and waste products as feedstocks in the production of energy. The final products from this project were two business plans; one for a Thermal plant, and one for a Biodiesel/Ethanol plant. Agricultural waste… more
Date: March 31, 2006
Creator: Blackwell,D.A; Broadhead, L.W. & Harrell, W.J.
Partner: UNT Libraries Government Documents Department
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