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Static Crucible Investigation of Corrosion and Mass-Transfer of Nickel in Molten Sodium Hydroxide With Various Additives

Description: Memorandum presenting an investigation of the effects of a number of additives on the phenomena of corrosion and mass transfer of nickel by molten sodium hydroxide in the neighborhood of 1500 degrees Fahrenheit by means of static crucible tests. The additives are classified by their effects, including being detrimental, inert, and beneficial. The additives found to reduce mass transfer were calcium hydride, sodium aluminate, and hydrogen.
Date: August 1953
Creator: Forestieri, Americo F. & Zelezny, William F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Phosphazene Based Additives for Improvement of Safety and Battery Lifetimes in Lithium-Ion Batteries

Description: There need to be significant improvements made in lithium-ion battery technology, principally in the areas of safety and useful lifetimes to truly enable widespread adoption of large format batteries for the electrification of the light transportation fleet. In order to effect the transition to lithium ion technology in a timely fashion, one promising next step is through improvements to the electrolyte in the form of novel additives that simultaneously improve safety and useful lifetimes witho… more
Date: October 2011
Creator: Harrup, Mason K.; Gering, Kevin L.; Rollins, Harry W.; Sazhin, Sergiy V.; Benson, Michael T.; Jamison, David K. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Metallic fuels: The EBR-II legacy and recent advances

Description: Experimental Breeder Reactor – II (EBR-II) metallic fuel was qualified for high burnup to approximately 10 atomic per cent. Subsequently, the electrometallurgical treatment of this fuel was demonstrated. Advanced metallic fuels are now investigated for increased performance, including ultra-high burnup and actinide burning. Advances include additives to mitigate the fuel/cladding chemical interaction and uranium alloys that combine Mo, Ti and Zr to improve alloy performance. The impacts of the … more
Date: September 1, 2012
Creator: Porter, Douglas L.; Hayes, Steven L. & Kennedy, J. Rory
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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De-coupling of exchange and persistence times in atomistic modelsof glass formers

Description: With molecular dynamics simulations of a fluid mixture of classical particles interacting with pair-wise additive Weeks-Chandler-Andersen potentials, we consider the time series of particle displacements and thereby determine distributions for local persistence times and local exchange times. These basic characterizations of glassy dynamics are studied over a range of super-cooled conditions and shown to have behaviors, most notably de-coupling, similar to those found in kinetically constrained… more
Date: August 15, 2007
Creator: Hedges, Lester O.; Maibaum, Lutz; Chandler, David & Garrahan, Juan P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effects of additives on pressure limits of flame propagation of propane-air mixtures

Description: Report presenting a study of seven additives in 0.5-volume-percent concentration for their effects on the low-pressure limits of flame propagation of propane-air mixtures. Limits were measured in a flame tube of new design. Results regarding propane-air mixtures, propane-air-additive mixtures, and flame propagation qualities are provided.
Date: December 18, 1953
Creator: Belles, Frank E. & Simon, Dorothy M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ignition of Ammonia and Mixed Oxides of Nitrogen in 200-Pound-Thrust Rocket Engines at 160 Degrees F

Description: Memorandum presenting a study of the ignition of ammonia and mixed oxides of nitrogen at 160 degrees Fahrenheit made with and without fuel additives utilizing small-scale rocket engines of approximately 200 pounds thrust. All experiments were conducted at sea-level pressures except two at a range of pressure altitudes. Results regarding the use of lithium as a catalyst, calcium as a catalyst, and no apparent catalyst are provided.
Date: May 13, 1954
Creator: Hennings, Glen; Ladanyi, Dezso J. & Enders, John H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Loss of xylidines in overwater storage of xylidine-blended fuel

Description: Tests were undertaken to determine the relationships for estimating the maximum amount of a water-soluble gasoline additive that will diffuse from the gasoline to the water when fuel is stored over the water and to determine from the relationships the amount of xylidines that will diffuse from the gasoline to the water in an overwater-storage system.
Date: March 1944
Creator: Tischler, Adelbert O. & Tischler, Adelbert O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Enzymology of acetone-butanol-isopropanol formation. Final technical report, June 1, 1985--July 31, 1997

Description: Several species of anaerobic bacteria within the genus Clostridium produce acetone, n-butanol, and isopropanol (solvents), which are important industrial chemicals and fuel additives. Commercial production of solvents by the clostridia is a classical example of largescale chemical production by bacterial fermentation. Although the fermentation has been in use for decades, it still faces problems that include strain degeneration, a relatively low final product concentration due to butanol toxici… more
Date: March 1, 1998
Creator: Chen, Jiann-Shin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Correlation Between Hydrogen Pressure and Protective Action of Additives in the Molten Sodium Hydroxide - Nickel System

Description: Memorandum presenting an investigation of the effect of various metallic additives on the molten sodium hydroxide - nickel system. The hydrogen evolved from such systems was measured and the evolution was correlated with the effect of the metal on mass transfer. Results regarding a check with standard tests, purging, presence of two valences for chromium, reaction time of the additive, and pressure within nickel crucibles are provided.
Date: February 9, 1956
Creator: May, Charles E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of chemical reactivity of lubricant additives on friction and surface welding at high sliding velocities

Description: Report presenting an investigation of the effect of chemical reactivity of lubricant additives on friction at high sliding velocities. The investigation was conducted with a kinetic-friction apparatus consisting of an elastically restrained spherical rider specimen sliding on a rotating steel disk lubricated with cetane containing lubricant additives of different chemical reactivities. Results regarding chlorine compounds and sulfur compounds are provided.
Date: August 1950
Creator: Bisson, Edmond E.; Swikert, Max A. & Johnson, Robert L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reactions with steel of compounds containing chemical groups used in lubricant additives

Description: Report presenting an investigation of the chemical reactions between steel of a type used in aircraft-engine cylinder barrels and compounds containing reactive groups commonly found in lubricant additives. The products formed by reaction at temperatures from 400 to 650 degrees F were analyzed by reflection electron diffraction. Results regarding the diffraction patterns, a description of the products found, and correlation of the results with results form other investigations are provided.
Date: February 1947
Creator: Powell, Allen S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Use of Highly Reactive Chemical Additives to Improve Afterburner Performance at Altitude

Description: Memorandum presenting an investigation in an altitude test chamber to evaluate the use of highly reactive chemicals injected into a turbojet afterburner to promote the combustion process, which was inhibited by water vapor from compressor-inlet injection. The chemicals evaluated were commercial hydrogen and aluminum trimethyl. Results regarding the effects of hydrogen injection on afterburner performance and effect of aluminum trimethyl afterburner fuel additive on performance are provided.
Date: September 30, 1958
Creator: Wanhainen, John P. & Sivo, Joseph N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of Additives on Corrosion and Mass Transfer in Sodium Hydroxide - Nickel Systems Under Free-Convection Conditions

Description: Memorandum presenting a study of the effect of additives on the extent of corrosion and mass transfer in sodium hydroxide - "L" nickel systems. The extent of corrosion and mass transfer was determined by a measurement of the weight change of a specimen in the hot zone, and by metallographic examination of the specimen cross section. Results regarding the reproducibility, appearance of specimens, and additives having a detrimental effect, no effect, or a beneficial effect are provided.
Date: August 2, 1954
Creator: Forestieri, Americo F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Detailed chemical kinetic modeling of diesel combustion with oxygenated fuels

Description: The influence of oxygenated hydrocarbons as additives to diesel fuels on ignition, NOx emissions and soot production has been examined using a detailed chemical kinetic reaction mechanism. N-heptane was used as a representative diesel fuel, and methanol, ethanol, dimethyl ether and dimethoxymethane were used as oxygenated fuel additives. It was found that addition of oxygenated hydrocarbons reduced NOx levels and reduced the production of soot precursors. When the overall oxygen content in the … more
Date: October 28, 1999
Creator: Pitz, W J; Curran, H J; Fisher, E; Glaude, P A; Marinov, N M & Westbrook, C K
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ab initio Calculation of Thermodynamic Data for Oxygenated Hydrocarbon Fuels and Radial Breakdown Species: R(OMe)n

Description: There has long been interest in the use of oxygenated hydrocarbon additives to conventional fuels. These oxygenates have been shown to reduce soot emissions in diesel engines and CO emissions in spark-ignition engines; and often allow diesel operation with decreased NO{sub x}. The current widely used additive, MTBE is targeted for elimination as a gasoline additive due to its damaging effects on the environment. This creates a need for alternative oxygenated additives; and more importantly, amp… more
Date: March 23, 2001
Creator: Kubota, A; Pitz, W J; Westbrook, C K; Bozzelli, J & Glaude, P-A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Temperature response of turbine-blade metal covered with oxide coatings supplied by fuel additives

Description: Report presenting an investigation to determine the effects of turbine-blade coatings, supplied by fuel additives, on heat transfer with combustor exhaust gases to an S-816 alloy blade. Two fuel additives were used. The results indicated that the fuel additives provided an oxide coating on the combustor-liner wall and other metal parts, including the blade, exposed to the exhaust gas.
Date: August 20, 1952
Creator: McCafferty, Richard J. & Butze, Helmut F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of Isotope Dilution Techniques for Assay of Food Additives

Description: "lsotope dilution techniques are described for the assay of chlorinated hydrocarbon pesticides and organic phosphorus pesticides in foods. Results are given for the determination of tetranitro-DDT-dianilide, dianilide of tetranitro- DDE, dieldrin, systox, and derivatives of these compounds. "
Date: October 31, 1962
Creator: Nuclear Science and Engineering Corporation
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Multiple Access in Ultra-Wideband Communications Using Multiple Pulses and the Use of Least Squares Filters

Description: Multiple access (MA) in UWB communication has recently been studied in the context of multiple transmitted-reference short duration chirp pulses in the presence of additive white Gaussian noise (AWGN). The transmitted-reference (TR) receiver was extended in previous studies using multiple orthogonal pulses. Improved performance was observed in simulations by sampling the receiver autocorrelation function (ACF) at both zero- and non-zero lags. Sampling of non-zero ACF lags of orthogonal pulses i… more
Date: June 19, 2003
Creator: Dowla, Farid & Nekoogar, Faranak
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A nonlocal, ordinary, state-based plasticity model for peridynamics.

Description: An implicit time integration algorithm for a non-local, state-based, peridynamics plasticity model is developed. The flow rule was proposed in [3] without an integration strategy or yield criterion. This report addresses both of these issues and thus establishes the first ordinary, state-based peridynamics plasticity model. Integration of the flow rule follows along the lines of the classical theories of rate independent J{sub 2} plasticity. It uses elastic force state relations, an additive de… more
Date: May 1, 2011
Creator: Mitchell, John Anthony
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Food Additive Regulations: A Chronology

Description: The 104th Congress is actively debating proposals to reform several aspects of the Food and Drug Administration's (FDA) process for regulating consumer products, including its approval process for food additives. In June 1995, the Food and Drug Administration (FDA) announced at a House Government Reform and Oversight Subcommittee hearing several policy shifts in its food additive pre-market approval process which will soon be implemented.
Date: September 13, 1995
Creator: Vogt, Donna U.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Anomalous vomume expansion of plutonium alloys

Description: A simple heuristic model for the valence of Pu in its various phases is used to explain the large positive deviations from Vegard's Law in ..cap alpha..-Pu(Al), ..cap alpha..-Pu(Ti), and delta-Pu(Sc).
Date: January 1, 1981
Creator: Fisk, Z.; Elliott, R.O.; Tate, R.E. & Roof, R.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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