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Effects of catalytic mineral matter on CO/CO sub 2 , temperature and burning time for char combustion
The temperature of a char particle burning in an oxygen containing atmosphere is the product of a strongly coupled balance between particle size and physical properties, heat transfer from the particle, surface reactivity, CO/CO{sub 2} ratio and gas phase diffusion in the surrounding boundary layer and within the particle. CO{sub 2}/CO ratios can be strongly influenced by catalytic material in the carbon and by the char temperature. In this program we are measuring the CO{sub 2}/CO ratio for both catalyzed and uncatalyzed chars over a wide range of temperature. These results will then be used to develop predictive models for char temperature and burning rates. The electrodynamic balance has been successfully used to make such measurements for single 200{mu}m spherocarb particles. A few theoretical approaches to model a single particle oxidation have been made, but most of them assumed the infinitely thin reaction zone at the particle surface. This approach can not explain pore diffusion limitation, structural change, or reaction at low temperatures inside the particle. Too simplifying solid phase reaction may leads to wrong predictions. In this report, progress on constructing models including both solid and gas phase reaction are reported.
Date:
May 4, 1992
Creator:
Longwell, J. P.; Sarofim, A. F.; Lee, Chun-Hyuk & Modestino, A. J.
Object Type:
Report
System:
The UNT Digital Library
[Letter from Sandra Lanier-Lerma to Nancy Reynolds, November 1993]
Photocopy of a letter from Sandra Lanier-Lerma, Assistant Superintendent for Instruction and Operations for Corpus Christi ISD to Nancy Reynolds, Project Coordinator of North Texas Institute for Educators on the Visual Arts. In regards to an invitation sent by NTIEVA to Corpus Christi ISD to form a partnership. CCISD's initial plan includes the formation of a partnership with the Art Museum of South Texas to develop a Satellite Consortium in South Texas and to write a five-year plan to providing quality art education programs in South Texas. CCISD district looks forward to the opportunities with North Texas Institute for Educators on the Visual Arts might provide for the students.
Date:
November 4, 1993
Creator:
Lanier-Lerma, Sandra
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Vicki Rosenberg to Jack Davis, November 4, 1993]
Photocopy of a letter from Vicki Rosenberg, program office for the Getty Center, to Jack Davis, co-director for North Texas Institute for Educators on the Visual Arts. The letter is in regards to Rosenberg's and Val Marmillion's visit to Denton on the morning of January 18th and they will be leaving the afternoon of January 20th. The evening of the 18th Rosenberg and Marmillion are meeting with Melba Whatley of the Marcus Foundation to discuss the importance of funding arts education. The rest of their time will be spent with Davis and NTIEVA.
Date:
November 4, 1993
Creator:
Rosenberg, Vicki
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Cassandra Broadus to Eddye O'Neal, February 4, 1991]
Photocopy of a letter from Cassandra Broadus, North Texas Institute for Educators on the Visual Arts to Eddye O'Neal, teacher at T.D. Marshall Elementary School. Broadus is interested in helping arrange a field trip to the Dallas Museum of Art for first graders at T.D. Marshall. Broadus writes that she has spoken with Aileen Horan at the Dallas Museum of Art and has arranged for a free field trip for the class, and that the buses will also be provided by the museum. Broadus hopes that O'Neal will consider this opportunity for her students and to contact her as soon as possible to discuss further details.
Date:
February 4, 1991
Creator:
Broadus, Cassandra
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Nancy Reynolds to Joe Cordova, November 4, 1992]
Photocopy of a letter from Nancy Reynolds, Project Coordinator of North Texas Institute for Educators on the Visual Arts, to Joe Cordova, Boys & Girls Clubs of Greater Fort Worth, Inc. In regards to NTIEVA working with the club for three sessions of their seminar and how the clubs staff participated with desire to work towards implementation of more comprehensive art programs. Enclosed in the letter to Cordova are recommendations for the Arts & Crafts Program for the organization.
Date:
November 4, 1992
Creator:
Reynolds, Nancy
Object Type:
Letter
System:
The UNT Digital Library
A method to estimate the concentration of elements in smoke from burning vegetation growing in contaminated soil
The Savannah River Site has areas where soil is contaminated with metals and/or radionuclides. Many of these areas are surrounded by native vegetation which is growing adjacent to the area and where the roots have penetrated into the contaminated soil of the area. In some cases vegetation has actually invaded the contaminated area. Even though the volume of contaminated vegetation is small, there are problems associated with its disposal. Vegetation decomposes quickly after burial and the volume of buried vegetation can decrease. The voids left can lead to subsidence and possible failure of the clay cap constructed over hazardous and/or radioactive waste burial grounds. An alternative to burying the wood is to burn it and bury the ash. However, burning will introduce the contamination in the vegetation into the air where there is potential for inhalation of the contaminants. A procedure is described to assess the hazard associated with inhalation of contamination from burning of vegetation growing in contaminated soil. The procedure is applied to evaluation of the consequence of burning vegetation grown adjacent to and in the SRL Seepage Basins. The results indicate that burning the vegetation during the day could introduce a level of contaminants to the atmosphere …
Date:
March 4, 1991
Creator:
Murphy, C. E. Jr.
Object Type:
Report
System:
The UNT Digital Library
Studies of complex fragment emission in heavy ion reactions
This report discusses the following topics: High energy photon production in a HI collision; the mechanism for the disassembly of excited {sup 16}O projectiles into four alpha particles; the disassembly of excited {sup 28}Si projectiles; large pre-fission multiplicities from temperature; dependent friction and fission barriers; multiplicity correlations; molecular beam induced fusion; dwarf ball and wall; mini wall; and computer and local data acquisition systems.
Date:
September 4, 1991
Creator:
Charity, R.J. & Sobotka, L.G.
Object Type:
Report
System:
The UNT Digital Library
[News Clip: Detroit shooting]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
September 4, 1994, 5:30 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Stock market]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
April 4, 1994, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Talk radio]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
January 4, 1995, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Rene update]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 4, 1994, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Fundamentals of particle beam dynamics and phase space
This report discusses the following topics on synchrotron accelerators: Transverse motion---betatron oscillations; machine lattice; representation of a particle beam; and longitudinal motion---synchrotron oscillations.
Date:
September 4, 1991
Creator:
Weng, W. T. & Mane, S. R.
Object Type:
Report
System:
The UNT Digital Library
NQR-NMR studies of higher alcohol synthesis Cu-Co catalysts
During this period, we focused our attention in analyzing the magnetic nature of the extensively used trimetallic catalyst system Cu-Co-Cr for the production of higher alcohols. We believe that there could be some correspondence between the catalytic and magnetic behaviors of the transition metal catalyst systems. Both the morphology and metallic charge distribution of the particles are known to govern the catalytic as well as the magnetic properties of the system.
Date:
May 4, 1992
Creator:
Murty, A.N.
Object Type:
Report
System:
The UNT Digital Library
[News Clip: Beached whale]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
April 4, 1993, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Powell recant]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 4, 1994, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Emmitt]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
February 4, 1994, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Lucas recan VO]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 4, 1994, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Pollution]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
May 4, 1994
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Cheerleaders]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
January 4, 1994, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Gang meet]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
August 4, 1994, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
NQR-NMR studies of higher alcohol synthesis Cu-Co catalysts
The primary concern of the study during this period has been to examine the origin and basis of the several nonconforming NMR lines reported in our earlier study. Previous studies by earlier investigators indicate that (a) the product distribution in the conversion of synthesis gas to liquid fuels is dependant on the copper/cobalt ratio and (b) that the catalytic results reported by different groups of investigators using the IFP prescription (4) are widely divergent. These observations prompted us to make a critical examination of the effect of metal ratio and the method of preparation on the magnetic character of catalysts.
Date:
April 4, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0098.0185]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
November 4, 1994
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0102.0245]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
November 4, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Faculty Recital: 1996-06-11 - Faculty Chamber Recital
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:
June 4, 1996
Creator:
Bradetich, Judi Rockey; Scott, John C. (John Charles), 1947-; Fisher, Judy; Enyeart, Carter; Bradetich, Jeff; Veazey, Charles et al.
Object Type:
Sound
System:
The UNT Digital Library