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Alternative Fuels and Chemicals from Synthesis Gas
The overall objectives of this program are to investigate potential technologies for the conversion of synthesis gas to oxygenated and hydrocarbon fuels and industrial chemicals, and to demonstrate the most promising technologies at DOE�s LaPorte, Texas, Slurry Phase Alternative Fuels Development Unit (AFDU). The program will involve a continuation of the work performed under the Alternative Fuels from Coal-Derived Synthesis Gas Program and will draw upon information and technologies generated in parallel current and future DOE-funded contracts.
Date:
December 2, 1998
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 99, No. 225, Ed. 1 Wednesday, December 2, 1998
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 2, 1998
Creator:
Cole, Carol
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Advertiser (Alvin, Tex.), Ed. 1 Wednesday, December 2, 1998
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
December 2, 1998
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Ash & Pulverized Coal Deposition in Combustors & Gasifiers
Further progress in achieving the objectives of the project was made in the period of October 1 to December 31, 1996. In particular, the sublayer model for evaluating the particle deposition in turbulent flows was extended to include the effect of particle rebound. A new more advance flow model for the near wall vortices is also used in these analysis. The computational model for simulating particle transport in turbulent flows was used to analyze the dispersion and deposition of particles in a recirculating flow region. The predictions of the particle resuspension model is compared with the experimental data. It is shown that when the effects of the near wall flow structure, as we as the surface roughness are included the model agrees with the available experimental data. Considerable progress was also made in the direct numerical simulation of particle removal process in turbulent gas flows. Experimental data for transport and deposition of glass fiber in the aerosol wind tunnel was also obtained.
Date:
December 2, 1998
Creator:
Ahmadi, Goodarz
Object Type:
Report
System:
The UNT Digital Library
Ash & Pulverized Coal Deposition in Combustors & Gasifiers
Further progress in achieving the objectives of the project was made in the period of October I to December 31, 1997. The direct numerical simulation of particle removal process in turbulent gas flows was continued. Variations of vorticity contours which are averaged over a short time duration are studied. It is shown that the near wall vortices profoundly affect the particle removal process in turbulent boundary layer flows. The sublayer model for evaluating the particle deposition in turbulent flows was extended to include the effect of particle rebound. A new more advance flow model for the near wall vortices is also used in these analysis. Sample particle trajectories are obtained and discussed. Experimental data for transport and deposition of fibrous particles in the aerosol wind tunnel was obtained. The measured deposition velocity is compared with the empirical correlation and the available data and discussed. Particle resuspension process in turbulent flows are studied. The model is compared with the experimental data. It is shown that when the effects of the near wall flow structure, as well as the surface roughness are included the model agrees with the available experimental data.
Date:
December 2, 1998
Creator:
Ahmadi, Goodarz
Object Type:
Report
System:
The UNT Digital Library
Ash & Pulverized Coal Deposition in Combustors & Gasifiers
Further progress in achieving the objectives of the project was made in the period of January I to March 31, 1998. The direct numerical simulation of particle removal process in turbulent gas flows was completed. Variations of particle trajectories are studied. It is shown that the near wall vortices profoundly affect the particle removal process in turbulent boundary layer flows. Experimental data for transport and deposition of fibrous particles in the aerosol wind tunnel was obtained. The measured deposition velocity for irregular fibrous particles is compared with the empirical correlation and the available data for glass fibers and discussed. Additional progress on the sublayer model for evaluating the particle deposition and resuspension in turbulent flows was made.
Date:
December 2, 1998
Creator:
Ahmadi, Goodarz
Object Type:
Report
System:
The UNT Digital Library
Ash & Pulverized Coal Deposition in Combustors & Gasifiers
Further progress in achieving the objectives of the project was made in the period of July 1 to September 30, 1997. The direct numerical simulation of particle removal process in turbulent gas flows was continued. Variations of vorticity contours which are averaged over a short time duration are studied. It is shown that the near wall vortices profoundly affect the particle removal process in turbulent boundary layer flows. The sublayer model for evaluating the particle deposition in turbulent flows was extended to include the effect of particle rebound. A new more advance flow model for the near wall vortices is also used in these analysis. Sample particle trajectories are obtained and discussed. Experimental data for transport and deposition of fibrous particles in the aerosol wind tunnel was obtained. The measured deposition velocity is compared with the empirical correlation and the available data and discussed. Particle resuspension process in turbulent flows are studied. The model is compared with the experimental data. It is shown that when the effects of the near wall flow structure, as well as the surface roughness are included the model agrees with the available experimental data.
Date:
December 2, 1998
Creator:
Ahmadi, Goodarz
Object Type:
Report
System:
The UNT Digital Library
Automated Boiler Combustion Controls for Emission Reduction and Efficiency Improvement
In the late 1980s, then President Bush visited Krakow, Poland. The terrible air quality theremotivated him to initiate a USAID-funded program, managed by DOE, entitled �Krakow Clean Fossil Fuels and Energy Efficiency Program.� The primary objective of this program was to encourage the formation of commercial ventures between U.S. and Polish firms to provide equipment and/or services to reduce pollution from low-emission sources in Krakow, Poland. This program led to the award of a number of cooperative agreements, including one to Control Techtronics International. The technical objective of CTI�s cooperative agreement is to apply combustion controls to existing boiler plants in Krakow and transfer knowledge and technology through a joint U.S. and Polish commercial venture. CTI installed automatic combustion controls on five coal boilers for the district heating system in Krakow. Three of these were for domestic hot-water boilers, and two were for steam for industrial boilers. The following results have occurred due to the addition of CTI�s combustion controls on these five existing boilers: ! 25% energy savings ! 85% reduction in particulate emissions The joint venture company CTI-Polska was then established. Eleven additional technical and costing proposals were initiated to upgrade other coal boilers in Krakow. To date, …
Date:
December 2, 1998
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 77, No. 28, Ed. 1 Wednesday, December 2, 1998
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 2, 1998
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 103, No. 96, Ed. 1 Wednesday, December 2, 1998
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
December 2, 1998
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Collegian (Hurst, Tex.), Vol. 11, No. 12, Ed. 1 Wednesday, December 2, 1998
Weekly student newspaper published in Hurst, Texas serving the Tarrant County Junior College District that includes school news and information along with advertising.
Date:
December 2, 1998
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Colony Courier (The Colony, Tex.), Vol. 2, No. 4, Ed. 1 Wednesday, December 2, 1998
Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date:
December 2, 1998
Creator:
Sorter, Dave
Object Type:
Newspaper
System:
The Portal to Texas History
Decontamination and decommissioning of the Argonne Thermal Source Reactor at Argonne National Laboratory - East project final report.
The ATSR D&D Project was directed toward the following goals: (1) Removal of radioactive and hazardous materials associated with the ATSR Reactor facility; (2) Decontamination of the ATSR Reactor facility to unrestricted use levels; and (3)Documentation of all project activities affecting quality (i.e., waste packaging, instrument calibration, audit results, and personnel exposure). These goals had been set in order to eliminate the radiological and hazardous safety concerns inherent in the ATSR Reactor facility and to allow, upon completion of the project, unescorted and unmonitored access to the area. The reactor aluminum, reactor lead, graphite piles in room E-111, and the contaminated concrete in room E-102 were the primary areas of concern. NES, Incorporated (Danbury, CT) characterized the ATSR Reactor facility from January to March 1998. The characterization identified a total of thirteen radionuclides, with a total activity of 64.84 mCi (2.4 GBq). The primary radionuclides of concern were Co{sup 60}, Eu{sup 152}, Cs{sup 137}, and U{sup 238}. No additional radionuclides were identified during the D&D of the facility. The highest dose rates observed during the project were associated with the reactor tank and shield tank. Contact radiation levels of 30 mrem/hr (0.3 mSv/hr) were measured on reactor internals during dismantlement …
Date:
December 2, 1998
Creator:
Fellhauer, C.; Garlock, G. & Mathiesen, J.
Object Type:
Report
System:
The UNT Digital Library
Development of mixed-conducting ceramics for gas separation applications.
Mixed-conducting oxides are used in many applications, including fuel cells, gas separation membranes, sensors, and electrocatalysis. This paper describes mixed-conducting ceramic membranes that are being developed to selectively remove oxygen and hydrogen from gas streams in a nongalvanic mode of operation (i.e., with no electrodes or external power supply). Because of its high combined electronic/ionic conductivity and significant oxygen permeability, the mixed-conducting Sr-Fe-Co oxide (SFC) has been developed for high-purity oxygen separation and/or partial oxidation of methane to synthesis gas, i.e., syngas, a mixture of carbon monoxide and hydrogen. The electronic and ionic conductivities of SFC were found to be comparable in magnitude and are presented as a function of temperature. The oxygen flux through dense SFC tubes during separation of oxygen from air is compared with the oxygen flux during methane conversion. Unlike SFC, in which the ionic and electronic conductivities are nearly equivalent, BaCe{sub 0.80}Y{sub 0.20}O{sub 3} (BCY) exhibits protonic conductivity that is significantly higher than its electronic conductivity. To enhance the electronic conductivity and increase hydrogen permeation, metal powder was combined with the BCY to form a cermet membrane. Nongalvanic permeation of hydrogen through the cermet membrane was demonstrated and characterized as a function of membrane thickness. …
Date:
December 2, 1998
Creator:
Balachandran, U.
Object Type:
Article
System:
The UNT Digital Library
The effect of low dose-rate irradiation on the microstructure of 304 stainless steel.
Changes in mechanical and corrosion properties caused by the development of radiation-induced microstructure have relevance to the aging and lifetime extension of light water reactors (LWR's). However, much of the current data related to microstructural development in irradiated metals are generated from studies carried out at much higher dose-rates than encountered in LWR's. An opportunity exists to study the influence of low dose-rate irradiation on microstructural development for a variety of structural and surveillance materials extracted from the experimental breeder reactor EBR-II. In this study, irradiated 304 stainless steel hexagonal ''hex'' duct material is examined in order to compare microstructure in the dose-rate range of 10{sup {minus}7}-10{sup {minus}9} dpakec. The samples, taken from the reflector locations in EBR-II, experienced a total dose between 10 and 12 dpa at a temperature of {approximately}375 C. Transmission electron microscopy (TEM) results reveal that there is a moderate dose-rate effect on microstructural development for samples irradiated in the range of 2 x 10{sup {minus}8} to 4 x 10{sup {minus}8} dpa/sec, however a substantial dose rate-effect exists between dose-rates of 2 x 10{sup {minus}8} and 1 x 10{sup {minus}9} dpa/sec Transmission electron microscopy (TEM) results will detail the development of the microstructure in terms of …
Date:
December 2, 1998
Creator:
Cole, J. I.
Object Type:
Article
System:
The UNT Digital Library
Ensemble: 1998-12-02 - UNT Brass Choir
Access:
Use of this item is restricted to the UNT Community
COncert performed at the UNT College of Music Concert Hall.
Date:
December 2, 1998
Creator:
UNT Brass Choir
Object Type:
Sound
System:
The UNT Digital Library
Ensemble: 1998-12-02 - UNT Jazz Repertory Lab
Access:
Use of this item is restricted to the UNT Community
Jazz concert performed at the UNT College of Music Kenton Hall.
Date:
December 2, 1998
Creator:
UNT Jazz Repertory Lab
Object Type:
Sound
System:
The UNT Digital Library
Ensemble: 1998-12-02 - UNT Saxophone Quartets
Access:
Use of this item is restricted to the UNT Community
Concert performed at the UNT College of Music Merrill Ellis Intermedia Theater.
Date:
December 2, 1998
Creator:
UNT Saxophone Quartets
Object Type:
Sound
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Wednesday, December 2, 1998
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 2, 1998
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Faculty Recital: 1998-12-02 - Terri Sundberg, flute
Access:
Use of this item is restricted to the UNT Community
A faculty and guest artist recital performed at the UNT College of Music Recital Hall.
Date:
December 2, 1998
Creator:
Sundberg, Terri
Object Type:
Sound
System:
The UNT Digital Library
Illustrated Paperboy (Cleveland, Tex.), Vol. 6, No. 36, Ed. 1 Wednesday, December 2, 1998
Weekly newspaper from Cleveland, Texas that includes local, county, and state news along with extensive advertising.
Date:
December 2, 1998
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Inductively Coupled Plasma Etching of III-V Semiconductors in BCl(3)-Based Chemistries: Part II: InP, InGaAs, InGaAsP, InAs and AllnAs
A parametric study of etch rates and surface morphologies of In-containing compound semiconductors (InP, InGaAs, InGaAsP, InAs and AlInAs) obtained by BClj-based Inductively Coupled Plasmas is reported. Etch rates in the range 1,500-3,000 &min. are obtained for all the materials at moderate source powers (500 W), with the rates being a strong function of discharge composition, rf chuck power and pressure. Typical root-mean-square surface roughness of-5 nm were obtained for InP, which is worse than the values obtained for Ga-based materials under the same conditions (-1 run). The near surface of etched samples is typically slightly deficient in the group V element, but the depth of this deficiency is small (a few tens of angstroms).
Date:
December 2, 1998
Creator:
Abernathy, C.R.; Han, J.; Hobson, W.S.; Hong, J.; Lambers, E.S.; Lee, J.W. et al.
Object Type:
Article
System:
The UNT Digital Library
Magneto-optical studies of magnetization processes in high-Tc superconductors structure.
Magneto-optical imaging is a powerful tool for nondestructive quality control and scientific research through visualization of magnetic fields around any magnetic flux or current carrying sample. It allows real time observations of domain structures and their transformations in magnetics, static and dynamic field patterns due to inhomogeneous currents in electric circuits and superconductors, and reveals distortions of the fields due to defects. In addition to qualitative pictures showing different details in the intensities of the magneto-optical images, one can obtain quantitative maps of field distributions and retrieve values of the underlying currents or magnetization variations. In this review we discuss the advantages of magneto-optics for studies of superconductors, show its place among other techniques, and report recent results in magneto-optical investigations of high temperature superconductors (HTS).
Date:
December 2, 1998
Creator:
Vlasko-Vlasox, V. K.
Object Type:
Article
System:
The UNT Digital Library
Mannford Eagle (Mannford, Okla.), Vol. 17, No. 40, Ed. 1 Wednesday, December 2, 1998
Weekly newspaper from Mannford, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 2, 1998
Creator:
Retherford, Bill R.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History