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186
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Methane oxidation over dual redox catalysts
Review and analysis of the literature data on electron transfer itself and electron transfer oxidation of alkyl radicals was done in order to understand the mechanism by which methyl radical can be oxidized to CH{sub 3}{sup +} and further substituted by OH{sup {minus}} to form methanol. This allowed to compare and classify the various possible reaction patterns, understand the mechanism and circumstances of operation of each of them and select those which can be involved in oxidation of methyl radical. As a result an approach that is complementary to catalytic test studies was proposed. It consists of investigation of a set of partial reactions which reproduce a whole catalytic cycle in order to prove the reaction mechanism. Synthesis of new oxide catalysts of the delafossite type, containing concentrated double redox sites, were designed. Synthesis of hydrozincite as a starting material for the preparation of doubly doped zinc oxide was performed.
Date:
March 1, 1989
Creator:
Klier, Kamil; Herman, Richard G. & Sojka, Zvigniew
Object Type:
Report
System:
The UNT Digital Library
LIMB Demonstration Project Extension
The basic goal of the Limestone Injection Multistage Burner (LIMB) demonstration is to extend LIMB technology development to a full- scale application on a representative wall-fired utility boiler. The successful retrofit of LIMB to an existing boiler is expected to demonstrate that (a) reductions of 50 percent or greater in SO{sub x} and NO{sub x} emissions can be achieved at a fraction of the cost of add-on FGD systems, (b) boiler reliability, operability, and steam production can be maintained at levels existing prior to LIMB retrofit, and (c) technical difficulties attributable to LIMB operation, such as additional slagging and fouling, changes in ash disposal requirements, and an increased particulate load, can be resolved in a cost-effective manner. The primary fuel to be used will be an Ohio bituminous coal having a nominal sulfur content of 3 percent or greater.
Date:
March 15, 1989
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Pulse atmospheric fluidized bed combustion
The overall objective of the program is the development of a pulsed atmospheric fluidized-bed combustion (PAFBC) technology to burn coal and to provide heat and steam to commercial, institutional, and small industrial applications at a reasonable price in an environmentally acceptable manner. During this reporting period, a total of eight shakedown and debugging coal combustion tests were performed in the AFBC. A start-up procedure was established, system improvements implemented, and preliminary material and heat balances made based on these tests. The pulse combustor for the AFBC system was fabricated and installed and a series of tests was conducted on the system. 17 figs., 5 tabs.
Date:
March 1, 1989
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
L-star pulsed coal combustor for residential space heating
This quarter, substantial improvement in the coal carbon conversion was achieved. Specifically, for a scaled-down version of the residential combustor, coal carbon conversions exceeding 97 percent were realized, when utilizing methane as carrier gas for the coal. Design changes include insulation of the combustor, introduction of a flame holder, combustion air preheat and presence of an obstructing plate at the combustor exhaust port. Only the first two changes contributed towards substantial improvement in coal conversion. In addition, monitoring of CH{sub 4} concentration in the exhaust gases gave a real time indication of the combustor performance. Finally, the results of experiments performed in this quarter contributed to design changes that have led to a combustor that has achieved the program goal of > 99 percent conversion of coal carbon. 5 figs., 2 tabs.
Date:
March 1, 1989
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Fabrication and test of prototype ring magnets for the ALS (Advanced Light Source)
Prototype Models for the Advanced Light Source (ALS) Booster Dipole, Quadrupole and Sextupole and the Storage Ring Gradient Magnet, Quadrupole and Sextupole have been constructed. The Booster Magnet Prototypes have been tested. The Storage Ring Magnets are presently undergoing tests and magnetic measurements. This paper reviews the designs and parameters for these magnets, briefly describes features of the magnet designs which respond to the special constraints imposed by the requirements for both accelerator rings, and reviews some of the results of magnet measurements for the prototype. 13 refs., 7 figs., 1 tab.
Date:
March 1, 1989
Creator:
Tanabe, J.; Avery, R.; Caylor, R.; Green, M.I.; Hoyer, E.; Halbach, K. et al.
Object Type:
Article
System:
The UNT Digital Library
Japanese Refrigerators Field Testing.
Residential refrigerators consume the equivalent of 1700 megawatts (MW) of baseload power in the Bonneville Power Administration (BPA) service area. Japanese manufacturers have designed refrigerator units that appear more energy efficient than some currently available American models. This report summarizes preliminary findings from field testing of 12 refrigerators of Japanese manufacture to evaluate annual kilowatt hour (kWh) use during actual operation. The units have also undergone laboratory testing sponsored by BPA at ETL Testing Laboratories, Inc. in Cortland, New York. A final report of the project -- due at the end of 1989 -- will correlate in detail the results of field and laboratory tests in comparison to performance ratings determined by the manufacturer.
Date:
March 1, 1989
Creator:
Lou, Albert T.
Object Type:
Report
System:
The UNT Digital Library
Final focus test beam alignment: A draft proposal
The Final Focus Test Beam is a transport line designed to transmit 50 GeV electron beams of SLC emittance (3 {times} 10{sup {minus}10} radian-meters) straight through the central arm of the Beam Switchyard (BSY C line) with a final focus point out in the Research Yard but relatively near the end of the switchyard tunnel. The hardware, methods and procedures outlined in this proposal are dedicated to measuring the placement of mechanical objects with respect to certain defined geometric axes. We wish to emphasize that the very difficult problems of locating the effective magnetic axes of focusing elements, the effective electrical center of beam position monitors and even the effective axis of the incident beam relative to mechanical reference surfaces is outside the scope of this work. Further, this proposal is restricted to the act of measurement and does not consider the vital task of on-line mechanical repositioning of elements that will, in likelihood, be called upon during operation of the system. 16 refs., 16 figs., 4 tabs.
Date:
March 1, 1989
Creator:
Fischer, G. E. & Ruland, R. E.
Object Type:
Report
System:
The UNT Digital Library
Finding the magnetic center of a quadrupole to high resolution: A draft proposal
In a companion proposal it is proposed to align quadrupoles of a transport line to within transverse tolerances of 5 to 10 micrometers. Such a proposal is meaningful only if the effective magnetic center of such lenses can in fact be repeatably located with respect to some external mechanical tooling to comparable accuracy. It is the purpose of this note to describe some new methods and procedures that will accomplish this aim. It will be shown that these methods are capable of yielding greater sensitivity than the more traditional methods used in the past. The notion of the nodal'' point is exploited. 4 refs., 5 figs., 1 tab.
Date:
March 1, 1989
Creator:
Fischer, G.E.; Cobb, J.K. & Jensen, D.R.
Object Type:
Report
System:
The UNT Digital Library
Enhanced durability and reactivity for zinc ferrite desulfurization sorbent
AMAX Research Development Center (AMAX R D) has been investigating methods for enhancing the reactivity and durability of the zinc ferrite desulfurization sorbent. Zinc ferrite sorbents are intended for use in desulfurization of hot coal gas in integrated gasification combined cycle (IGCC) or molten carbonate fuel cell (MCFC) applications. For the present program, the reactivity of the sorbent may be defined as its sulfur sorption capacity at the breakthrough point and at saturation in a bench-scale, fixed-bed reactor. Durability may be defined as the ability of the sorbent to maintain important physical characteristics such As size, strength, and specific surface area during 10 cycles of sulfidation and oxidation.
Date:
March 6, 1989
Creator:
Jha, M. C. & Berggren, M. H.
Object Type:
Report
System:
The UNT Digital Library
Secondary atomization of single coal-water fuel droplets
The evaporative behavior of single, well characterized droplets of a lignite coal-water slurry fuel (CWSF) and a carbon black in water slurry was studied as a function of heating rate and droplet composition. Induced droplet heating rates were varied from 0 to 10{sup 5} K/s. Droplets studied were between 97 and 170 {mu}m in diameter, with compositions ranging from 25 to 60% solids by weight. The effect of a commercially available surfactant additive package on droplet evaporation rate, explosive boiling energy requirements, and agglomerate formation was assessed. Surfactant concentrations were varied from none to 2 and 4% by weight solution (1.7 and 3.6% by weight of active species on a dry coal basis). The experimental system incorporated an electrodynamic balance to hold single, free droplets, a counterpropagating pulsed laser heating arrangement, and both video and high speed cinematographic recording systems. Data were obtained for ambient droplet evaporation by monitoring the temporal size, weight, and solids concentration changes. 49 refs., 31 figs.
Date:
March 1, 1989
Creator:
Hassel, G. R. & Scaroni, A. W.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0076.0209]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Carling Bassett-Sequso takes a break during her match Thursday."
Date:
March 1, 1989
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Guest Artist Recital: 1989-03-20 - Nancy Chochran Block, horn, and Patricia Higdon, piano
Access:
Use of this item is restricted to the UNT Community
A guest artist recital performed at the UNT College of Music Recital Hall.
Date:
March 20, 1989
Creator:
Block, Nancy Cochran & Higdon, Patricia
Object Type:
Sound
System:
The UNT Digital Library
[Photograph 2012.201.B0104.0005]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
March 29, 1989
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0074.0366]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Jay's Tonnette Mouse, left, Cynthia Baldwin, center, and Stephanie Campbell grieve Saturday's 68-61 loss to Kingfisher."
Date:
March 11, 1989
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Students take a stand
Article about Texas Academy of Mathematics and Science students voicing disapproval about an editorial published in the North Texas Daily recently.
Date:
March 10, 1989
Creator:
unknown
Object Type:
Clipping
System:
The UNT Digital Library
Addition displaces students from halls
Article discussing the beginning of construction on an addition to McConnell Hall, and the students that will be displaced by the Texas Academy of Mathematics and Science taking over the dormitory.
Date:
March 3, 1989
Creator:
Lusk, Melinda
Object Type:
Clipping
System:
The UNT Digital Library
[Letters and Curriculum Vitae of Jim Sybert]
Letters concerning Jim Sybert's application for the position of Director of the Texas Academy of Mathematics and Science. Sybert's Curriculum Vitae is also included.
Date:
[1989-03-06..1989-04-24]
Creator:
Sybert, James R.
Object Type:
Letter
System:
The UNT Digital Library
NT students come first
Article expressing the opinion that undergraduate and graduate level students at the University of North Texas should not be shoved aside to make room to house TAMS students on campus, and that a cap should be placed on the number of TAMS students admitted to the university until there is enough room to house all students.
Date:
March 8, 1989
Creator:
unknown
Object Type:
Clipping
System:
The UNT Digital Library
[Photograph 2012.201.B0135.0576]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Through a world war, the Depression, another world war and various economic panics, B. C. Clark Jewelers has survived. While Oklahoma celebrates the Centennial of the 1889 Land Run, B. C. Clark Jewelers will have its own centennial in three more years."
Date:
March 29, 1989
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0241]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Ward 7 Oklahoma City residents will have to go to the polls one more time to determine whether Willa Johnson or Goree James will represent them in the city council, Oklahoma County District Judge David M. Cook said Thursday."
Date:
March 30, 1989
Creator:
Gooch, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0156.0681]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Jodi Deer / Music / Stillwater Okla."
Date:
March 17, 1989
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0153.0059]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "D. R. Daniel wrestles a steer during Friday night's Timed event Championship at Lazy E Arena."
Date:
March 3, 1989
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0162.0044]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
March 2, 1989
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0162.0045]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Gray Dickinson is helping Boulevard Bowl prepare for the U. S. Open."
Date:
March 2, 1989
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History