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BENCH-SCALE DEMONSTRATION OF HOT-GAS DESULFURIZATION TECHNOLOGY
Designs for advanced integrated gasification combined cycle (IGCC) power systems call for desulfurization of carbonaceous fuel-derived synthesis gas (syngas) using regenerable sorbents at high-temperature, high pressure (HTHP) conditions. Regeneration of the sulfided sorbent using an oxygen-containing gas stream or air results in a sulfur dioxide (SO{sub 2})-containing offgas at HTHP conditions. The patented Direct Sulfur Recovery Process (DSRP) developed by RTI with support from the National Energy Technology Laboratory (NETL) and its precursor organizations [Federal Energy Technology Center (FETC) and Morgantown Energy Technology Center (METC)] efficiently converts the SO{sub 2} in this offgas to elemental sulfur. Under development since 1988, the original work was conducted in a laboratory with simulated laboratory gas mixtures. The Direct Sulfur Recovery Process is a catalytic reduction process for efficiently converting to elemental sulfur up to 98% or more of the sulfur dioxide (SO{sub 2}) contained in the regeneration offgas streams produced in advanced integrated gasification combined cycle (IGCC) power systems. The DSRP reacts the regeneration offgas with a small slipstream of syngas to effect the desired reduction. In this project, the DSRP was demonstrated with actual coal-derived syngas (as opposed to the simulated laboratory mixtures used in previous projects for the original development work) …
Date:
April 1, 2002
Creator:
Gangwal, S.K. & Portzer, J.W.
Object Type:
Report
System:
The UNT Digital Library
[Benjamin Franklin and Mary Hay Langford, Jr. Home Photograph #2]
Photograph of the Benjamin Franklin and Mary Hay Langford, Jr. Home, in Bandera, Texas.
Date:
April 2002
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Benjamin Franklin and Mary Hay Langford, Jr. Home Photograph #7]
Photograph of the Benjamin Franklin and Mary Hay Langford, Jr. Home, in Bandera, Texas.
Date:
April 2002
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
Biochemical and Molecular Inhibition of Plastidial Carbonic Anhydrase Reduces the Incorporation of Acetate into Lipids in Cotton Embryos and Tobacco Cell Suspensions and Leaves
Article on biochemical and molecular inhibition of plastidial carbonic anhydrase reducing the incorporation of acetate into lipids in cotton embryos and tobacco cell suspensions and leaves.
Date:
April 2002
Creator:
Hoang, Chau V. & Chapman, Kent D.
Object Type:
Article
System:
The UNT Digital Library
Border Business Indicators, Volume 26, Number 4, April 2002
Monthly publication documenting statistics related to economic information in the Mexico-Texas border areas including types of border crossings, employment, customs revenues, and other related data.
Date:
April 2002
Creator:
Texas Center for Border Economic and Enterprise Development
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Building a Better Lessons Learned Program - White Paper
Lessons learned are more in vogue today than at any time in our history. You can’t tune into a news broadcast without hearing a reference to the concept – and for good reason. People are finally accepting the idea that they may be able to benefit from the experiences of others. Corporations, government departments, and even the military are actively using lessons learned information to help them to achieve their varied goals. The Department of Energy is one of the government departments that has a Lessons Learned Program and requires its contractors to develop a program of their own. Unfortunately, adequate guidance is not available to enable contractors to design a fully mature program (i.e., a program that will immediately meet their every need) and to ensure that it is implemented such that it will be deemed acceptable during subsequent assessments. The purpose of this paper is to present the reader with information that might help him or her better plan and develop a new or upgraded Lessons Learned Program. The information is based on the actual development and implementation of a “second generation” lessons learned program and is presented as a chronicle of the steps taken to build the …
Date:
April 1, 2002
Creator:
Miller, Charles Frederick
Object Type:
Report
System:
The UNT Digital Library
Buildings for the 21st Century, Spring 2002
The Buildings for the 21st Century newsletter is produced by the Office of Building Technology, State and Community Programs and contains information on building programs, events, products, and initiatives, with a focus on energy efficiency and renewable energy. The spring issue contains information on a series of high-performance building brochures, the State Energy Program, a new modular and manufactured home, a new buildings database, solid-state ceramic lighting, weatherization, simplified Web site addresses, a Colorado home builder, and upcoming events and meetings.
Date:
April 1, 2002
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
["Bush to name conservative, gays to AIDS panel" article, April 1, 2002]
An article, written by Lou Chibbaro Jr. for the Washington Blade, about the new group of advisors who will be tackling the HIV/AIDS issue with President George W. Bush. The article lists out the new members and also points to supporters and raises concerns that some have over what the group's outcome will be.
Date:
April 1, 2002
Creator:
Chibbaro, Lou, Jr.
Object Type:
Article
System:
The UNT Digital Library
Captive Rearing Program for Salmon River Chinook Salmon, 2000 Project Progress Report.
During 2000, the Idaho Department of Fish and Game (IDFG) continued to develop techniques to rear chinook salmon Oncorhynchus tshawytscha to sexual maturity in captivity and to monitor their reproductive performance under natural conditions. Eyed-eggs were collected to establish captive cohorts from three study streams and included 503 eyed-eggs from East Fork Salmon River (EFSR), 250 from the Yankee Fork Salmon River, and 304 from the West Fork Yankee Fork Salmon River (WFYF). After collection, the eyed-eggs were immediately transferred to the Eagle Fish Hatchery, where they were incubated and reared by family group. Juveniles collected the previous summer were PIT and elastomer tagged and vaccinated against vibrio Vibrio spp. and bacterial kidney disease before the majority (approximately 75%) were transferred to the National Marine Fisheries Service, Manchester Marine Experimental Station for saltwater rearing through sexual maturity. Smolt transfers included 158 individuals from the Lemhi River (LEM), 193 from the WFYF, and 372 from the EFSR. Maturing fish transfers from the Manchester facility to the Eagle Fish Hatchery included 77 individuals from the LEM, 45 from the WFYF, and 11 from the EFSR. Two mature females from the WFYF were spawned in captivity with four males in 2000. Only one …
Date:
April 1, 2002
Creator:
Venditti, David A.
Object Type:
Report
System:
The UNT Digital Library
CARBON DIOXIDE CAPTURE FROM FLUE GAS USING DRY REGENERABLE SORBENTS
The objective of this project is to develop a simple, inexpensive process to separate CO{sub 2} as an essentially pure stream from a fossil fuel combustion system using a regenerable, sodium-based sorbent. The sorbents being investigated in this project are primarily alkali carbonates, and particularly sodium carbonate and potassium carbonate, which are converted to bicarbonates, through reaction with carbon dioxide and water vapor. Bicarbonates are regenerated to carbonates when heated, producing a nearly pure CO{sub 2} stream after condensation of water vapor. This quarter, electrobalance tests conducted at LSU indicated that exposure of sorbent to water vapor prior to contact with carbonation gas does not significantly increase the reaction rate. Calcined fine mesh trona has a greater initial carbonation rate than calcined sodium bicarbonate, but appears to be more susceptible to loss of reactivity under severe calcination conditions. The Davison attrition indices for Grade 5 sodium bicarbonate, commercial grade sodium carbonate and extra fine granular potassium carbonate were, as tested, outside of the range suitable for entrained bed reactor testing. Fluidized bed testing at RTI indicated that in the initial stages of reaction potassium carbonate removed 35% of the carbon dioxide in simulated flue gas, and is reactive at higher …
Date:
April 1, 2002
Creator:
Green, David A.; Turk, Brian S.; Gupta, Raghubir P.; McMichael, William J.; Harrison, Douglas P. & Liang, Ya
Object Type:
Report
System:
The UNT Digital Library
Cat's Claw (Archer City, Tex.), Vol. 56, No. 4, Ed. 1 Monday, April 1, 2002
Monthly student newspaper from Archer City High School in Archer City, Texas that includes news and information of interest to students along with advertising.
Date:
April 1, 2002
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Cell Design to Maximize Capacity in CDMA Networks
This presentation discusses the code division multiple access (CDMA) inter-cell effects, capacity regions, maximizing network capacity, mobility, a call admission control algorithm, and network performance.
Date:
April 2002
Creator:
Akl, Robert G.
Object Type:
Presentation
System:
The UNT Digital Library
Characterization of Coal Combustion by-Products for the Re-Evolution of Mercury Into Ecosystems
EPA and state environmental agencies are suggesting that mercury (Hg) in coal combustion by-products is re-emitted into local ecosystems by additional processing to final products (i.e., wallboard, etc.), by dissolution into groundwater, or by reactions with anaerobic bacteria. This perception may limit the opportunities to use coal combustion by-products in recycle/reuse applications. In this program, CONSOL Energy is conducting a comprehensive sampling and analytical program to address this concern. If the results of this work demonstrate that re-emissions of Hg from waste disposal and by-product utilization are over-stated, additional regulations regarding coal combustion, waste disposal, and waste material utilization will not be required. This will result in continued low energy cost that is beneficial to the national economy and stability of local economies that are dependent on coal. In this quarter, fly ash and FGD slurry samples from five coal-fired utilities were collected for leaching; four samples were leached.
Date:
April 1, 2002
Creator:
Schwalb, A.M.; Withum, J.A. & Statnick, R.M.
Object Type:
Report
System:
The UNT Digital Library
The Christian Chronicle (Oklahoma City, Okla.), Vol. 59, No. 4, Ed. 1, April 2002
Monthly newspaper from Oklahoma City, Oklahoma that includes news and information about the Churches of Christ along with advertising.
Date:
April 2002
Creator:
McBride, Bailey & LaMascus, R. Scott
Object Type:
Newspaper
System:
The Portal to Texas History
Coating and Mandrel Effects on Fabrication of Glow Discharge Polymer Nif Scale Indirect Drive Capsules
OAK A271 COATING AND MANDREL EFFECTS ON FABRICATION OF GLOW DISCHARGE POLYMER NIF SCALE INDIRECT DRIVE CAPSULES. Targets for the National Ignition Facility (NIF) need to be about 200 {micro}m thick and 2 mm in diameter. These dimensions are well beyond those currently fabricated on a routine basis. They have investigated fabrication of near NIF scale targets using the depolymerizable mandrel technique. Poly-alpha-methylstyrene (PAMS) mandrels, about 2 mm in diameter, of varying qualities were coated with as much as 125 {micro}m of glow discharge polymer (GDP). The surface finish of the final shells was examined using a variety of techniques. A clear dependence of the modal spectrum of final GDP shell on the quality of the initial PAMS mandrels was observed. isolated features were found to be the greatest cause for a shell not meeting the NIF standard.
Date:
April 2002
Creator:
Nikroo, A.; Pontelandolfo, J. M. & Castillo, E. R.
Object Type:
Article
System:
The UNT Digital Library
Collaborating with Industry for Innovation: Laboratory Coordinating Council (Brochure)
This is a brochure describing Laboratory Coordinating Council's network of labs and facilities to promote partnership between industry and national laboratories.
Date:
April 1, 2002
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Combination of Evidence in Dempster-Shafer Theory
Dempster-Shafer theory offers an alternative to traditional probabilistic theory for the mathematical representation of uncertainty. The significant innovation of this framework is that it allows for the allocation of a probability mass to sets or intervals. Dempster-Shafer theory does not require an assumption regarding the probability of the individual constituents of the set or interval. This is a potentially valuable tool for the evaluation of risk and reliability in engineering applications when it is not possible to obtain a precise measurement from experiments, or when knowledge is obtained from expert elicitation. An important aspect of this theory is the combination of evidence obtained from multiple sources and the modeling of conflict between them. This report surveys a number of possible combination rules for Dempster-Shafer structures and provides examples of the implementation of these rules for discrete and interval-valued data.
Date:
April 1, 2002
Creator:
SENTZ, KARI & FERSON, SCOTT
Object Type:
Report
System:
The UNT Digital Library
Comparison between predicted duct effectiveness from proposed ASHRAE Standard 152P and measured field data for residential forced air cooling systems
The proposed ASHRAE Standard 152P ''Method of Test for Determining the Design and Seasonal Efficiencies of Residential Thermal Distribution Systems'' (ASHRAE 2002) has recently completed its second public review. As part of the standard development process, this study compares the forced air distribution system ratings provided by the public review draft of Standard 152P to measured field results. 58 field tests were performed on cooling systems in 11 homes in the summers of 1998 and 1999. Seven of these houses had standard attics with insulation on the attic floor and a well-vented attic space. The other four houses had unvented attics where the insulation is placed directly under the roof deck and the attic space is not deliberately vented. Each house was tested under a range of summer weather conditions at each particular site, and in some cases the amount of duct leakage was intentionally varied. The comparison between 152P predicted efficiencies and the measured results includes evaluation of the effects of weather, duct location, thermal conditions, duct leakage, and system capacity. The results showed that the difference between measured delivery effectiveness and that calculated using proposed Standard 152P is about 5 percentage points if weather data, duct leakage and …
Date:
April 1, 2002
Creator:
Siegel, Jeffrey A.; McWilliams, Jennifer A. & Walker, Iain S.
Object Type:
Report
System:
The UNT Digital Library
COMPOSITION AND STRUCTURAL STUDIES OF STRONG GLOW DISCHARGE POLYMER COATINGS
OAK A271 COMPOSITION AND STRUCTURAL STUDIES OF STRONG GLOW DISCHARGE POLYMER COATINGS. An investigation of the chemical composition and structure of strong glow discharge (GDP) polymer shells made for cryogenic experiments at OMEGA is described. The investigation was carried out using combustion and Fourier Transform Infrared Spectroscopy (FTIR) analysis. The strongest coatings were observed to have the lowest hydrogen content or hydrogen/carbon H/C ratio, whereas the weakest coatings had the highest hydrogen content or H/C ratio. Chemical composition results from combustion were used to complement FTIR analysis to determine the relative hydrogen content of as-fabricated coatings. Good agreement was observed between composition results obtained from combustion and FTIR analysis. FTIR analysis of coating structures showed the strongest coatings to have less terminal methyl groups and a more double bond or olefinic structure. Strong GDP coatings that were aged in air react more with oxygen and moisture than standard GDP coatings. In addition to a more olefinic structure, there may also be more free-radial sites present in strong GDP coatings, which leads to greater oxygen uptake.
Date:
April 1, 2002
Creator:
CZECHOWICZ, DG; CASTILLO, ER & NIKROO, A
Object Type:
Article
System:
The UNT Digital Library
Compressive Creep and Thermophysical Performance of Mullite Refractories
Compressive creep testing of ten commercially available mullite refractories was performed at 1300-1450 C and at static stresses between 0.2-0.6 MPa. These refractories were examined because they are used in borosilicate glass furnace crowns and superstructures along with in sidewall applications. Additionally, despite their high cost ({approx}$500/ft{sup 3}) they are cheaper than other refractories such as chrome alumina ({approx}$3000/ft{sup 3}) or fusion-cast alumina ({approx}900/ft{sup 3}) which are used as replacements for traditional silica refractories in harsh oxy-fuel environments. The corrosion resistances of these ten materials were also evaluated. In addition, measurements were made that tracked their dimensional stability, phase content, microstructure, and composition as a function of temperature and time. The techniques used for these characterizations and their respective analyses are described. An intent of this study was to provide objective and factual results whose interpretations were left to the reader.
Date:
April 1, 2002
Creator:
Hemrick, J. G.
Object Type:
Report
System:
The UNT Digital Library
CONCEPTUAL DESIGN ASSESSMENT FOR THE CO-FIRING OF BIO-REFINERY SUPPLIED LIGNIN PROJECT
The major aspects of this project are proceeding toward completion. Prior to this quarter, design criteria, tentative site selection, facility layout, and preliminary facility cost estimates were completed and issued. Processing of bio-solids was completed, providing material for the pilot operations. Pilot facility hydrolysis production has been completed to produce lignin for co-fire testing and the lignin fuel was washed and dewatered. Both the lignin and bio-solids fuel materials for co-fire testing were sent to the co-fire facility (EERC) for evaluation and co-firing. EERC has received coal typical of the fuel to the TVA-Colbert boilers. This material was used at EERC as baseline material and for mixing with the bio-fuel for combustion testing. All the combustion and fuel handling tests at EERC have been completed. During fuel preparation EERC reported no difficulties in fuel blending and handling. Preliminary co-fire test results indicate that the blending of lignin and bio-solids with the Colbert coal blend generally reduces NO{sub x} emissions, increases the reactivity of the coal, and increases the ash deposition rate on superheater surfaces. Deposits produced from the fuel blends, however, are more friable and hence easier to remove from tube surfaces relative to those produced from the baseline Colbert …
Date:
April 1, 2002
Creator:
Berglund, Ted; Ranney, Jeffrey T.; Babb, Carol L. & Broder, Jacqueline G.
Object Type:
Report
System:
The UNT Digital Library
Consolidated Compressed Air System Reduces Power Consumption and Energy Costs Office of Industrial Technologies (OIT) Forest Products BestPractices Technical Case Study
Augusta Newsprint Company consolidated two compressed air systems at its facility in Augusta, GA. The results are a more streamlined system, added storage capacity, backflow prevention, and the elimination of unused equipment.
Date:
April 1, 2002
Creator:
United States. Department of Energy. Office of Energy Efficiency and Renewable Energy. Office of Industrial Technologies.
Object Type:
Text
System:
The UNT Digital Library
Corrective Action Plan for Corrective Action Unit 490: Station 44 Burn Area, Tonopah Test Range, Nevada
Corrective Action Unit (CAU) 490, Station 44 Burn Area is located on the Tonopah Test Range (TTR). CAU 490 is listed in the Federal Facility Agreement and Consent Order (FFACO, 1996) and includes for Corrective Action Sites (CASs): (1) Fire Training Area (CAS 03-56-001-03BA); (2) Station 44 Burn Area (CAS RG-56-001-RGBA); (3) Sandia Service Yard (CAS 03-58-001-03FN); and (4) Gun Propellant Burn Area (CAS 09-54-001-09L2).
Date:
April 1, 2002
Creator:
Campbell, K. B.
Object Type:
Report
System:
The UNT Digital Library
CP violation and moduli stabilization in heterotic models
The role of moduli stabilization in predictions for CP violation is examined in the context of four-dimensional effective supergravity models obtained from the weakly coupled heterotic string. They point out that while stabilization of compactification moduli has been studied extensively, the determination of background values for other scalar by dynamical means has not been subjected to the same degree of scrutiny. These other complex scalars are important potential sources of CP violation and they show in a simple model how their background values (including complex phases) may be determined from the minimization of the supergravity scalar potential, subject to the constraint of vanishing cosmological constant.
Date:
April 1, 2002
Creator:
Giedt, Joel
Object Type:
Article
System:
The UNT Digital Library