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718 Matching Results
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Steam gasification of carbon: Catalyst properties
This research uses several techniques to measure the concentration of catalyst sites and determine their stoichiometry for the catalyzed gasification of carbon. Both alkali and alkaline earth oxides are effective catalysts for accelerating the gasification rate of coal chars, but only a fraction of the catalyst appears to be in a form that is effective for gasification, and the composition of that catalyst is not established. Transient techniques, with {sup 13}C labeling, are being used to study the surface processes, to measure the concentration of active sites, and to determine the specific reaction rates. We have used secondary ion mass spectrometry (SIMS) for both high surface area samples of carbon/alkali carbonate mixtures and for model carbon surfaces with deposited alkali atoms. SIMS provides a direct measure of surface composition. The combination of these results can provide knowledge of catalyst dispersion and composition, and thus indicate the way to optimally utilize carbon gasification catalysts.
Date:
March 16, 1992
Creator:
Falconer, J.L.
Object Type:
Report
System:
The UNT Digital Library
Enhanced coal hydrogasification via oxidative pretreatment
The gasification of coal char by hydrogen is much slower than in steam or carbon dioxide; moreover, hydrogasification rate in pure hydrogen decreases sharply with conversion for most carbons. To overcome this kinetic behavior, the oxidation of the char prior to and during hydrogasification has been investigated as a means of enhancing hydro gasification rate. Kinetic rate studies under well-characterized conditions have been complemented by careful surface analyses to characterize oxygen on the char surface prior to and during hydrogasification.
Date:
April 16, 1992
Creator:
Miller, D.J.
Object Type:
Report
System:
The UNT Digital Library
Etiology of contaminated wounds
The US Department of Energy reports of events that occurred in the chemical processing 200 Areas of the Hanford Site during the period from 1972 through 1986 were reviewed to identify the causes of contaminated wounds. Contaminated wounds were reported in 19 events involving 20 workers. The causal agents (high risk operations) and the root causes were characterized. Emergency actions taken and their efficacy were noted. The 19 wound events were compared with 17 events with the potential for inhalation. It was found that the wound events involve a single worker and frequently result in an internal contamination and its resulting dose. Inhalation events involve groups of workers and rarely resulted in detectable internal contamination. The difference is attributed to anticipation of an inhalation event and use of respiratory protection and continuous air monitors to mitigate its effects.
Date:
January 16, 1992
Creator:
Sudmann, R.H.
Object Type:
Article
System:
The UNT Digital Library
Failure of latch mechanism for motion control of safety rods
During safety rod tests in K-reactor prior to startup, one safety rod could not be lifted because the button'' broke off and became lodged in the mechanism. Examination of the failed latch assembly along with other assemblies from both K-Area and L-Area revealed several missing buttons as well as severely deformed jaw hanger extensions.'' We participated in the investigation of the damage by request of the Reactor Restart Section. Based on our study of the latch mechanism, the modifications to the safety rod extension,'' and the operating history of the machine, this memorandum describes the causes of the observed damage with experimental evidence and calculations to support the findings. 3 refs.
Date:
January 16, 1992
Creator:
Yau, W. W. F. & Leader, D. R.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0139.0255]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Jim and Dean Cole, left, and Dorothy and George Orcutt enjoy the Lyric party."
Date:
May 16, 1992
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0171.0469]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Ann Earp gives a smooch to Leo the Lion, one of many animals in her private zoo at Adair."
Date:
March 16, 1992
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0146.0151]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Really, it was the bank's fault, said Oklahoma City Police Sgt. Gerald Cowan."
Date:
March 16, 1992
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0599]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Vallene Cooks, Emerson Alternative School principal, said she receives inquiries or requests for tours each week from other school districts wondering how to develop similar programs."
Date:
March 16, 1992
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0140.0309]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Color Me Badd, from left, Sam Watters, Kevin Thornton, Bryan Abrams and Mark Calderon, performs as the headliner act before a a hometown crowd at the Myriad on Tuesday night."
Date:
June 16, 1992
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0139.0432]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
December 16, 1992
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0256.0117]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
August 16, 1992
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0353.0358]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The concrete boat docks built by the U. S. Navy, can be touched up with new plastering's of concrete instead of being torn out and replaced by less stable floating docks, many boat slip renters say."
Date:
September 16, 1992
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0316B.0365]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Stacy D. Johnson is shown during her two week stint last fall as a student at Northwest Classen High School."
Date:
September 16, 1992
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0323.0335]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
August 16, 1992
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0257.0333]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Barry Herr, left, Oklahoma City GM assembly plant manager, and John Rock, Oldsmobile general manager, discuss improvements made to the 1993 Cutlass Supreme before a national media briefing Wednesday to introduce Oldsmobile's new models."
Date:
September 16, 1992
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0333.0306]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Designer Kenneth King"
Date:
September 16, 1992
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0310B.0056]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
January 16, 1992
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0313B.0658]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
September 16, 1992
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0230.0077]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "John Griffin, owner of the Putnam City Gazette and a former Ward 1 city councilman, said he has had enough with "underhanded ways."
Date:
January 16, 1992
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0253.0071]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
May 16, 1992
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0261B.0733]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "James D. Holt"
Date:
August 16, 1992
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0262B.0635]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Michael Butts of Middletown, Md., guides a sulky with Mister Commander in the traces Friday during the Grand National and World Championship Morgan Horse Show at the state fairgrounds in Oklahoma City."
Date:
October 16, 1992
Creator:
Gooch, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0256.0326]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
November 16, 1992
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0250.0961]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "(Diabetes nurse) Lee Harris will Instruct a six-week diabetes course for patients and their families at Mercy Health Center, 4300 W Memorial Road."
Date:
October 16, 1992
Creator:
Lynn, Renee
Object Type:
Photograph
System:
The Gateway to Oklahoma History