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Development of a Novel Catalyst for NO Decomposition (open access)

Development of a Novel Catalyst for NO Decomposition

Air pollution arising from the emission of nitrogen oxides as a result of combustion taking place in boilers, furnaces and engines, has increasingly been recognized as a problem. New methods to remove NO{sub x} emissions significantly and economically must be developed. The current technology for post-combustion removal of NO is the selective catalytic reduction (SCR) of NO by ammonia or possibly by a hydrocarbon such as methane. The catalytic decomposition of NO to give N{sub 2} will be preferable to the SCR process because it will eliminate the costs and operating problems associated with the use of an external reducing species. The most promising decomposition catalysts are transition metal (especially copper)-exchanged zeolites, perovskites, and noble metals supported on metal oxides such as alumina, silica, and ceria. The main shortcoming of the noble metal reducible oxide (NMRO) catalysts is that they are prone to deactivation by oxygen. It has been reported that catalysts containing tin oxide show oxygen adsorption behavior that may involve hydroxyl groups attached to the tin oxide. This is different than that observed with other noble metal-metal oxide combinations, which have the oxygen adsorbing on the noble metal and subsequently spilling over to the metal oxide. This observation …
Date: March 31, 2005
Creator: Akyurtlu, Ates & Akyurtlu, Jale F
Object Type: Report
System: The UNT Digital Library

Greater Understanding of Lipids in Caenorhabditis elegans Exposed to Oxygen Deprivation

Presentation for the 2005 University Scholars Day at the University of North Texas discussing research on lipids in Caenorhabditis elegans exposed to oxygen deprivation.
Date: March 31, 2005
Creator: Alarcón, Jemma & Padilla, Pamela A.
Object Type: Presentation
System: The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 20, No. 12, Ed. 1 Thursday, March 31, 2005 (open access)

Timpson & Tenaha News (Timpson, Tex.), Vol. 20, No. 12, Ed. 1 Thursday, March 31, 2005

Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date: March 31, 2005
Creator: Alexander, Nancy
Object Type: Newspaper
System: The Portal to Texas History
Altus Times (Altus, Okla.), Vol. 106, No. 304, Ed. 1 Thursday, March 31, 2005 (open access)

Altus Times (Altus, Okla.), Vol. 106, No. 304, Ed. 1 Thursday, March 31, 2005

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: March 31, 2005
Creator: Andrews, Mike
Object Type: Newspaper
System: The Gateway to Oklahoma History
Garrett Electric Boosting Systems (EBS) Program (open access)

Garrett Electric Boosting Systems (EBS) Program

Turbo diesel engine use in passenger cars in Europe has resulted in 30-50% improvement in fuel economy. Diesel engine application is particularly suitable for US because of vehicle size and duty cycle patterns. Adopting this technology for use in the US presents two issues--emissions and driveability. Emissions reduction technology is being well addressed with advanced turbocharging, fuel injection and catalytic aftertreatment systems One way to address driveability is to eliminate turbo lag and increase low speed torque. Electrically assisted turbocharging concepts incorporated in e-Turbo{trademark} designs do both The purpose of this project is to design and develop an electrically assisted turbocharger, e-Turbo{trademark}, for diesel engine use in the US. In this report, early design and development of electrical assist technology is described together with issues and potential benefits. In this early phase a mathematical model was developed and verified. The model was used in a sensitivity study. The results of the sensitivity study together with the design and test of first generation hardware was fed into second generation designs. In order to fully realize the benefits of electrical assist technology it was necessary to expand the scope of work to include technology on the compressor side as well as electronic …
Date: March 31, 2005
Creator: Arnold, Steve; Balis, Craig; Barthelet, Pierre; Poix, Etienne; Samad, Tariq; Hampson, Greg et al.
Object Type: Report
System: The UNT Digital Library
The Endangered Species Act: A Primer (open access)

The Endangered Species Act: A Primer

The Endangered Species Act (ESA)1 receives significant congressional attention. The associated power and reach of its comprehensive protection for species identified as endangered or threatened with extinction has ignited concern that there be appropriate bounds on this power. The following discussion provides an overview and background on the various features of the ESA that contribute to its stature and yet spark an ongoing debate over its implementation.
Date: March 31, 2005
Creator: Baldwin, Pamela; Buck, Eugene H. & Corn, M. Lynne
Object Type: Report
System: The UNT Digital Library
The Endangered Species Act: A Primer (open access)

The Endangered Species Act: A Primer

The Endangered Species Act (ESA)1 receives significant congressional attention. The associated power and reach of its comprehensive protection for species identified as endangered or threatened with extinction has ignited concern that there be appropriate bounds on this power. The following discussion provides an overview and background on the various features of the ESA that contribute to its stature and yet spark an ongoing debate over its implementation.
Date: March 31, 2005
Creator: Baldwin, Pamela; Buck, Eugene H. & Corn, M. Lynne
Object Type: Report
System: The UNT Digital Library
NOx Control Options and Integration for US Coal Fired Boilers Quarterly Progress Report: January-March 2005 (open access)

NOx Control Options and Integration for US Coal Fired Boilers Quarterly Progress Report: January-March 2005

This is the nineteenth Quarterly Technical Report for DOE Cooperative Agreement No: DEFC26-00NT40753. The goal of the project is to develop cost effective analysis tools and techniques for demonstrating and evaluating low NO{sub x} control strategies and their possible impact on boiler performance for boilers firing US coals. The Electric Power Research Institute (EPRI) is providing co-funding for this program. Refurbished corrosion probes were installed at Plant Gavin and operated for approximately 1,300 hours. This quarterly report includes further results from the BYU catalyst characterization lab and the in-situ lab, and includes the first results from a model suitable for comprehensive simulation codes for describing catalyst performance. The SCR slipstream reactor at Plant Gadsden operated for approximately 100 hours during the quarter because of ash blockage in the inlet probe.
Date: March 31, 2005
Creator: Bockelie, Mike; Davis, Kevin; Senior, Connie; Shino, Darren; Swenson, Dave; Baxter, Larry et al.
Object Type: Report
System: The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 90, No. 172, Ed. 1 Thursday, March 31, 2005 (open access)

Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 90, No. 172, Ed. 1 Thursday, March 31, 2005

Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date: March 31, 2005
Creator: Broaddus, Matthew B.
Object Type: Newspaper
System: The Gateway to Oklahoma History
Indian Self-Determination and Education Assistance Act Contracts and Cherokee Nation of Oklahoma v. Leavitt: Agency Discretion to Fund Contract Support Costs (open access)

Indian Self-Determination and Education Assistance Act Contracts and Cherokee Nation of Oklahoma v. Leavitt: Agency Discretion to Fund Contract Support Costs

On March 1, 2005, the Supreme Court handed down its decision in Cherokee The nation of Oklahoma v. Leavitt. The conflicts in the case (actually two consolidated cases) involved federal agencies’ duty to fund contract support costs for contracts with Indian tribes under the Indian Self-Determination and Education Assistance Act (ISDA).
Date: March 31, 2005
Creator: Brooks, Nathan
Object Type: Report
System: The UNT Digital Library
Proposal for a High Energy Nuclear Database (open access)

Proposal for a High Energy Nuclear Database

The authors propose to develop a high-energy heavy-ion experimental database and make it accessible to the scientific community through an on-line interface. This database will be searchable and cross-indexed with relevant publications, including published detector descriptions. Since this database will be a community resource, it requires the high-energy nuclear physics community's financial and manpower support. This database should eventually contain all published data from Bevalac, AGS and SPS to RHIC and CERN-LHC energies, proton-proton to nucleus-nucleus collisions as well as other relevant systems, and all measured observables. Such a database would have tremendous scientific payoff as it makes systematic studies easier and allows simpler benchmarking of theoretical models to a broad range of old and new experiments. Furthermore, there is a growing need for compilations of high-energy nuclear data for applications including stockpile stewardship, technology development for inertial confinement fusion and target and source development for upcoming facilities such as the Next Linear Collider. To enhance the utility of this database, they propose periodically performing evaluations of the data and summarizing the results in topical reviews.
Date: March 31, 2005
Creator: Brown, D. A. & Vogt, R.
Object Type: Article
System: The UNT Digital Library
Proposal for a High Energy Nuclear Database (open access)

Proposal for a High Energy Nuclear Database

We propose to develop a high-energy heavy-ion experimental database and make it accessible to the scientific community through an on-line interface. This database will be searchable and cross-indexed with relevant publications, including published detector descriptions. Since this database will be a community resource, it requires the high-energy nuclear physics community's financial and manpower support. This database should eventually contain all published data from Bevalac and AGS to RHIC to CERN-LHC energies, proton-proton to nucleus-nucleus collisions as well as other relevant systems, and all measured observables. Such a database would have tremendous scientific payoff as it makes systematic studies easier and allows simpler benchmarking of theoretical models to a broad range of old and new experiments. Furthermore, there is a growing need for compilations of high-energy nuclear data for applications including stockpile stewardship, technology development for inertial confinement fusion and target and source development for upcoming facilities such as the Next Linear Collider. To enhance the utility of this database, we propose periodically performing evaluations of the data and summarizing the results in topical reviews.
Date: March 31, 2005
Creator: Brown, David A. & Vogt, Ramona
Object Type: Article
System: The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 112, No. 63, Ed. 1 Thursday, March 31, 2005 (open access)

Perry Daily Journal (Perry, Okla.), Vol. 112, No. 63, Ed. 1 Thursday, March 31, 2005

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date: March 31, 2005
Creator: Brown, Gloria
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Canadian Record (Canadian, Tex.), Vol. 115, No. 13, Ed. 1 Thursday, March 31, 2005 (open access)

The Canadian Record (Canadian, Tex.), Vol. 115, No. 13, Ed. 1 Thursday, March 31, 2005

Weekly newspaper from Canadian, Texas that includes local, state and national news along with some advertising.
Date: March 31, 2005
Creator: Brown, Laurie Ezzell
Object Type: Newspaper
System: The Portal to Texas History
Consular Identification Cards: Domestic and Foreign Policy Implications, the Mexican Case, and Related Legislation (open access)

Consular Identification Cards: Domestic and Foreign Policy Implications, the Mexican Case, and Related Legislation

The debate about consular identification cards in the United States has centered around the matrícula consular, the consular identification card issued by Mexican consulates to Mexican citizens in the United States. In May 2003, the Treasury Department issued regulations allowing acceptance of the cards as proof of identity for the purpose of opening a bank account, and the cards are accepted for other purposes as well, including issuance of drivers’ licenses.
Date: March 31, 2005
Creator: Bruno, Andorra & Storrs, K. Larry
Object Type: Report
System: The UNT Digital Library
Aluminum Carbothermic Technology (open access)

Aluminum Carbothermic Technology

This report documents the non-proprietary research and development conducted on the Aluminum Carbothermic Technology (ACT) project from contract inception on July 01, 2000 to termination on December 31, 2004. The objectives of the program were to demonstrate the technical and economic feasibility of a new carbothermic process for producing commercial grade aluminum, designated as the ''Advanced Reactor Process'' (ARP). The scope of the program ranged from fundamental research through small scale laboratory experiments (65 kW power input) to larger scale test modules at up to 1600 kW power input. The tasks included work on four components of the process, Stages 1 and 2 of the reactor, vapor recovery and metal alloy decarbonization; development of computer models; and economic analyses of capital and operating costs. Justification for developing a new, carbothermic route to aluminum production is defined by the potential benefits in reduced energy, lower costs and more favorable environmental characteristics than the conventional Hall-Heroult process presently used by the industry. The estimated metrics for these advantages include energy rates at approximately 10 kWh/kg Al (versus over 13 kWh/kg Al for Hall-Heroult), capital costs as low as $1250 per MTY (versus 4,000 per MTY for Hall-Heroult), operating cost reductions of over …
Date: March 31, 2005
Creator: Bruno, Marshall J.
Object Type: Report
System: The UNT Digital Library
Methane de-NOX for Utility PC Boilers (open access)

Methane de-NOX for Utility PC Boilers

Large-scale combustion tests with caking bituminous coal was on hold this quarter mainly due to Riley's Commercial Burner Test Facility (CBTF) not having adequate weatherproofing to support operation under freezing conditions. The CBTF was secured and decommissioned for the winter season. CBTF bituminous coal tests shall continue to remain on hold now as a result of project funding limitations, however. No further modifications at the CBTF are planned until needed support is obtained. Activities this quarter have concentrated on finding additional support for the project. Currently, GTI has been granted a no-cost time extension through September 2005 and efforts to secure more support will continue in hopes that large-scale preheat caking bituminous combustion tests will be carried out as planned.
Date: March 31, 2005
Creator: Bryan, Bruce; Rabovitser, Joseph; Nester, Serguei & Wohadlo, Stan
Object Type: Report
System: The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Thursday, March 31, 2005 (open access)

The Express-Star (Chickasha, Okla.), Ed. 1 Thursday, March 31, 2005

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date: March 31, 2005
Creator: Bush, Kent
Object Type: Newspaper
System: The Gateway to Oklahoma History
Characterization of Pump Flow at the Grand Coulee Pumping Station for Fish Passage, 2004 (open access)

Characterization of Pump Flow at the Grand Coulee Pumping Station for Fish Passage, 2004

This report describes a study conducted by PNNL for the Bonneville Power Administration to characterized the conditions fish experience when entrained in pump flow at the Grand Coulee Dam. PNNL used the Sensor Fish to measure the acceleration and pressure conditions that might be experienced by fish who are pulled through the pumps and turbines at Grand Coulee Dam's pump generation station and transported up into the feeder canal leading to Banks Lake. The probability that fish would be struck by the pump generating plant's new 9-bladed turbines was also calculated using Monte Carlo simulations. Our measurements showed relatively low turbulence except in the immediate vicinity of the runner environment. The highest pressure experienced by the Sensor Fish was estimated at 157 psi (the pressure gauge saturated at 155 psi). The probability of strike was also calculated, based on the average length of hatchery-reared juvenile kokanee (land-locked sockeye). Strike probabilities ranged from 0.755 for 2.36-inch fish to 0.3890 for 11.8-inch fish. The probability of strike estimates indicate that the majority (77%) of kokanne would be carried through the pump without being struck and most likely without injury resulting from pressure and turbulence exposure. Of the 23% that might be struck …
Date: March 31, 2005
Creator: Carlson, Thomas J.; Duncan, Joanne P. & Johnson, Robert L.
Object Type: Report
System: The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 84, No. 117, Ed. 1 Thursday, March 31, 2005 (open access)

The Baytown Sun (Baytown, Tex.), Vol. 84, No. 117, Ed. 1 Thursday, March 31, 2005

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date: March 31, 2005
Creator: Cash, Wanda Garner
Object Type: Newspaper
System: The Portal to Texas History
The Economics of the Federal Budget Deficit (open access)

The Economics of the Federal Budget Deficit

In FY1998, federal budget receipts exceeded outlays for the first time since 1969. Those surpluses continued through FY2001. At one time, those surpluses had been projected to continue, but conditions have since changed. The economy went into recession in 2001, and a stimulus package was enacted. Since then, the budget has been in deficit. The actual unified budget deficit for FY2004 was $412.1 billion. In January 2005, the Congressional Budget Office projected that there would be a budget deficit of $368 billion in FY2005, and a deficit of $295 billion in FY2006.
Date: March 31, 2005
Creator: Cashell, Brian W.
Object Type: Report
System: The UNT Digital Library
Combustion Turbine (CT) Hot Section Coating Life Management (open access)

Combustion Turbine (CT) Hot Section Coating Life Management

The integrity of coatings used in hot section components of combustion turbines is crucial to the reliability of the buckets. This project was initiated in recognition of the need for predicting the life of coatings analytically, and non-destructively; correspondingly, four principal tasks were established. Task 1, with the objective of analytically developing stress, strain and temperature distributions in the bucket and thereby predicting thermal fatigue (TMF) damage for various operating conditions; Task 2 with the objective of developing eddy current techniques to measure both TMF damage and general degradation of coatings and, Task 3 with the objective of developing mechanism based algorithms. Task 4 is aimed at verifying analytical predictions from Task 1 and the NDE predictions from Task 3 against field observations.
Date: March 31, 2005
Creator: Cheruvu, S. & Krzywosz, K.
Object Type: Report
System: The UNT Digital Library
Final Report: Guided Acoustic Wave Monitoring of Corrosion in Recovery Boiler Tubing (open access)

Final Report: Guided Acoustic Wave Monitoring of Corrosion in Recovery Boiler Tubing

Corrosion of tubing used in black-liquor recovery boilers is a major concern in all pulp and paper mills. Extensive corrosion in recovery boiler tubes can result in a significant safety and environmental hazard. Considerable plant resources are expended to inspect recovery boiler tubing. Currently, visual and ultrasonic inspections are primarily used during the annual maintenance shutdown to monitor corrosion rates and cracking of tubing. This Department of Energy, Office of Industrial Technologies project is developing guided acoustic waves for use on recovery boiler tubing. The feature of this acoustic technique is its cost-effectiveness in inspecting long lengths of tubes from a single inspection point. A piezoelectric or electromagnetic transducer induces guided waves into the tubes. The transducer detects fireside defects from the cold side or fireside of the tube. Cracking and thinning on recovery boiler tubes have been detected with this technique in both laboratory and field applications. This technique appears very promising for recovery boiler tube application, potentially expediting annual inspection of tube integrity.
Date: March 31, 2005
Creator: Chinn, D J; Quarry, M J & Rose, J L
Object Type: Report
System: The UNT Digital Library
Report to the President of the United States (open access)

Report to the President of the United States

Final report of the Commission on the Intelligence Capabilities of the United States describing their activities and findings regarding the failure of the Intelligence Community to provide accurate information about Iraq's weapons of mass destruction. It includes an assessment of current capabilities against threats and recommendations for improving the Intelligence Community.
Date: March 31, 2005
Creator: Commission on the Intelligence Capabilities of the United States Regarding Weapons of Mass Destruction
Object Type: Report
System: The UNT Digital Library