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The development of precipitated iron catalysts with improved stability
The objective of this program is to identify the chemical principles governing the deactivation of precipitated iron catalysts during Fischer-Tropsch synthesis and to use these chemical principles in the design of catalysts suitable for slurry reactors. The performance targets are 88% CO+H{sub 2} conversion with less than 1% deactivation/day for 1 month and a methane and ethane selectivity of no more than 7% (based on hydrocarbons and oxygenates only) at a space velocity of at least 2 normal liters per hr per gram iron (NL/hr/gFe) using a synthesis gas with 0.5-1.0 H{sub 2}:CO ratio in a slurry reactor.
Date:
May 6, 1992
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Powers of the President
This report is about the powers of the President.
Date:
May 6, 1969
Creator:
Tansill, William R.
Object Type:
Report
System:
The UNT Digital Library
Powers Of The President
This report consists of the powers of president.
Date:
May 6, 1969
Creator:
Tansill, William R.
Object Type:
Report
System:
The UNT Digital Library
Poll Taxes Levied By States
This report documents how every state deals with the poll tax, and the effect of the poll tax on the voting rights of citizens.
Date:
May 6, 1965
Creator:
Thornton, Robert L.
Object Type:
Report
System:
The UNT Digital Library
Postwar Presidents and the Senate Foreign Relations Committee, 1969.
This report is about the President-Senate foreign relations committee relationship.
Date:
May 6, 1969
Creator:
Collier, Ellen C.
Object Type:
Report
System:
The UNT Digital Library
Optimization of a VISAR for measuring flyer-plate velocities
VISAR (Velocity Interferometer System for Any Reflector) is commonly used for measuring flyer-plate velocities up to 6 km/s. Flyer plates can travel as much as 1 mm, which is large compared to usual depth-of-focus requirements for VISARs. Flyer plates are explosively driven, or driven by some other very energetic means; as such, they must be tested in a chamber, which will contain the explosion. Routing the laser beam to the chamber and the signal beam to the VISAR can be done safely and easily in multi-mode optical fibers. We have optimized a fiber-coupled VISAR system for measuring flyer-plate velocities. This system given constant signal levels over the full travel of the flyer plate. Furthermore, the signal-collection efficiency is maximized, which allows use of a moderately sized laser. We also have optimized the VISAR cavity so it does not limit the system efficiency while giving a velocity sensitivity of about 1 km/s per fringe. 5 refs.
Date:
May 6, 1992
Creator:
Sweatt, W. C.; Crump, O. B., Jr. & Brigham, W. P.
Object Type:
Article
System:
The UNT Digital Library
The development of precipitated iron catalysts with improved stability
The objective of this program is to identify the chemical principles governing the deactivation of precipitated iron catalysts during Fischer-Tropsch synthesis and to use these chemical principles in the design of catalysts suitable for slurry reactors. The performance targets are 88% CO+H{sub 2} conversion with less than 1% deactivation/day for 1 month and a methane and ethane selectivity of no more than 7% (based on hydrocarbons and oxygenates only) at a space velocity of at least 2 normal liters per hr gram iron (NL/hr/gFe) using a synthesis gas with 0.5--1.0 H{sub 2}:Co ratio in a slurry reactor.
Date:
May 6, 1992
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
High-temperature borate liquids: physical properties of glass-forming compositions
Several experimental routes can be used to develop a better understanding of the polymeric constitution (polyanionic and/or polyhedral distribution) of borate, germanate, and silicate glasses. Spectral, chemical, physical-chemical, and mechanical property information can be determined directly for the glass compositions of interest. Generally, only physical-chemical information is readily accessible for the corresponding high temperature liquids. It will be shown that information on each state of matter has its own particular merits. Most of the evidence thus far published suggests an excellent agreement between polyhedral distributions in an oxide glass and its corresponding high temperature liquid state. There is no well known oxide glass forming system for which such a state of affairs does not exist. In spite of this, occasional efforts are put forth which ignore some of what is known for oxide liquids, glasses, and crystals. Such attempts therefore invariably imply, if only indirectly, that significant changes occur in the polyhedral distributions close to the glass transition temperature region. Specific examples to be discussed will include efforts that avoid well known coordination change equilibria such as BO/sub 3/ reversible BO/sub 4/ and GeO/sub 4/ reversible GeO/sub 6/.
Date:
May 6, 1977
Creator:
Riebling, E.F.
Object Type:
Article
System:
The UNT Digital Library
The development of precipitated iron catalysts with improved stability
The objective of this program is to identify the chemical principles governing the deactivation of precipitated iron catalysts during Fischer-Tropsch synthesis and to use these chemical principles in the design of catalysts suitable for slurry reactors. The performance targets are 88% CO+H{sub 2} conversion with less than 1% deactivation/day for 1 month and a methane and ethane selectivity of no more than 7% (based on hydrocarbons and oxygenates only) at a space velocity of at least 2 normal liters per hr per gram iron (NL/hr/gFe) using a synthesis gas with 0.5-1.0 H{sub 2}:CO ratio in a slurry reactor.
Date:
May 6, 1992
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Workshop on core and sample curation for the National Continental Scientific Drilling Program
The Workshop on Core and Sample Curation was held to discuss the best means of handling, distributing, and advertising samples and data collected during a Continental Scientific Drilling Program (CSDP) and to establish better communication between sample curators regarding common problems. It was geneerally agreed that CSDP samples should be handled, on a regional basis, by existing data systems and sample repositories judged to have adequate staff and support. Repository design, sample handling procedures, and sample accounting systems were discussed. Across North America, support for curation of geological samples was varied, but it was strongest within states or regions with well-established energy and mineral industries. A well-supported repository pays for itself through the circulation and preservation of samples and stratigraphic information. A national CSDP must have a well-established curatorial policy and system of regional repositories to circulate information and samples throughout the scientific community. Well-curated samples and data are a national resource with considerable benefits for industry and academia. Attendees agreed to form a Society of Geoscience Curators to maintain communication between curators from private, government, and university repositories and core research laboratories.
Date:
May 6, 1981
Creator:
Goff, S. & Heiken, G. (eds.)
Object Type:
Article
System:
The UNT Digital Library
The development of precipitated iron catalysts with improved stability
The objective of this program is to identify the chemical principles governing the deactivation of precipitated iron catalysts during Fischer-Tropsch synthesis and to use these chemical principles in the design of catalysts suitable for slurry reactors. The performance targets are 88% CO+H{sub 2} conversion with less than 1% deactivation/day for 1 month and a methane and ethane selectivity of no more than 7% (based on hydrocarbons and oxygenates only) at a space velocity of at least 2 normal liters per hr per gram iron (NL/hr/gFe) using a synthesis gas with 0.5-1.0 H{sub 2}:CO ratio in a slurry reactor.
Date:
May 6, 1992
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
The development of precipitated iron catalysts with improved stability
The objective of this program is to identify the chemical principles governing the deactivation of precipitated iron catalysts during Fischer-Tropsch synthesis and to use these chemical principles in the design of catalysts suitable for slurry reactors. The performance targets are 88% CO+H{sub 2} conversion with less than 1% deactivation/day for 1 month and a methane and ethane selectivity of no more than 7% (based on hydrocarbons and oxygenates only) at a space velocity of at least 2 normal liters per hr per gram iron (NL/hr/gFe) using a synthesis gas with 0.5-1.0 H{sub 2}:CP ratio in a slurry reactor.
Date:
May 6, 1992
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
The development of precipitated iron catalysts with improved stability
The objective of this program is to identify the chemical principles governing the deactivation of precipitated iron catalysts during Fischer-Tropsch synthesis and to use these chemical principles in the design of catalysts suitable for slurry reactors. The performance targets are 88% CO+H{sub 2} conversion with less than 1% deactivation/day for 1 month and a methane and ethane selectivity of no more than 7% (based on hydrocarbons and oxygenates only) at a space velocity of at least 2 normal liters per hr per gram iron (NL/hr/gFe) using a synthesis gas with 0.5-1.0 H{sub 2}:CO ratio in a slurry reactor.
Date:
May 6, 1992
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Beam-storage studies in the Fermilab main ring
Bunched beams of 100 and 150 GeV have been stored in the Fermilab Main Ring for periods of up to one hour. The observations of beam current and beam profiles are analyzed for the effects of gas scattering, chromaticity and non-linear magnetic field.
Date:
May 6, 1982
Creator:
MacLachlan, J.A.
Object Type:
Article
System:
The UNT Digital Library
Guthrie Daily News. (Guthrie, Okla. Terr.), Vol. 5, No. 1479, Ed. 1 Sunday, May 6, 1894
Daily newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
May 6, 1894
Creator:
Smith, Winfield Scott
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Democrat. (Altus, Okla.), Vol. 3, No. 7, Ed. 1 Thursday, May 6, 1909
Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 6, 1909
Creator:
Ruthruff, C. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Oklahoma Weekly Leader (Guthrie, Okla.), Vol. 30, No. 10, Ed. 1 Thursday, May 6, 1920
Weekly newspaper from Guthrie, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 6, 1920
Creator:
Niblack, Leslie G.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Greer County Democrat (Mangum, Okla.), Vol. 25, No. 34, Ed. 1 Thursday, May 6, 1915
Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 6, 1915
Creator:
Watt, W. O.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mangum Star. (Mangum, Okla.), Vol. 21, No. 46, Ed. 1 Thursday, May 6, 1909
Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 6, 1909
Creator:
Taylor, J. E. & Taylor, A. H.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Kiowa Breeze. (Kiowa, Indian Terr.), Vol. 3, No. 7, Ed. 1 Friday, May 6, 1904
Weekly newspaper from Kiowa, Indian Territory that includes local, territorial, and national news along with advertising.
Date:
May 6, 1904
Creator:
Fortson, J. R.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Erratum: First-Principles Theory of Correlated Transport through Nanojunctions [Phys. Rev. Lett. 94, 116802 (2005)]
This article provides the correction of an equation that was misprinted in Physical Review Letters 94, 116802 (2005).
Date:
May 6, 2005
Creator:
Ferretti, A.; Calzolari, Arrigo; Di Felice, Rosa; Manghi, Franca; Caldas, Marilia J.; Buongiorno Nardelli, Marco et al.
Object Type:
Article
System:
The UNT Digital Library
Hooker Advance (Hooker, Okla.), Vol. 7, No. 13, Ed. 1 Friday, May 6, 1910
Weekly newspaper from Hooker, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 6, 1910
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Weekly News. (Altus, Okla.), Vol. 16, No. 10, Ed. 1 Thursday, May 6, 1915
Weekly newspaper from Altus, Oklahoma that includes local, county, state, and national news along with advertising.
Date:
May 6, 1915
Creator:
Orr, J. P.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Weekly News. (Altus, Okla.), Vol. 21, No. 11, Ed. 1 Thursday, May 6, 1920
Weekly newspaper from Altus, Oklahoma that includes local, county, state, and national news along with advertising.
Date:
May 6, 1920
Creator:
Orr, J. P.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History