1,315 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Hydroxides"  
Results: 1 - 24 next
open access

FINAL REPORT DURAMELTER 100 HLW SIMULANT VALIDATION TESTS WITH C-106/AY-102 FEEDS VSL-05R5710-1 REV 0 6/2/05

Description: The principal objectives of the DM100 tests were to determine the processing characteristics of several C-106/AY102 feeds derived from simulants prepared by different methods, which result in different physical characteristics of the feed. The VSL simulant used in a previous test was prepared by the direct hydroxide method, which was the method used for feed preparation in the bulk of previous VSL melter testing. The NOAH Technologies Corporation modified-rheology simulant was prepared to the s… more
Date: December 29, 2011
Creator: AA, KRUGER; KS, MATLACK; W, GONG & IL, PEGG
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

FINAL REPORT MELTER TESTS WITH AZ-101 HLW SIMULANT USING A DURAMELTER 100 VITRIFICATION SYSTEM VSL-01R10N0-1 REV 1 2/25/02

Description: This report provides data, analyses, and conclusions from a series of tests that were conducted at the Vitreous State Laboratory of The Catholic of America (VSL) to determine the processing rates that are achievable with AZ-101 HLW simulants and corresponding melter feeds on a DuraMelter 100 (DM100) vitrification system. One of the most critical pieces of information in determining the required size of the RPP-WTP HLW melter is the specific glass production rate in terms of the mass of glass th… more
Date: December 29, 2011
Creator: AA, KRUGER; KS, MATLACK; WK, KOT & IL, PEGG
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Stabilization and/or regeneration of spent sorbents from coal gasification. [Quarterly] technical report, December 1, 1991--February 29, 1992

Description: The objective of this investigation is to determine the effects of SO, partial pressure and reaction temperature on the conversion of sulfide containing solid wastes from coal gasifiers to stable and environmentally acceptable calcium-sulfate, while preventing the release of sulfur dioxide through undesirable side reactions during the stabilization step. An additional objective of this program is to investigate the use of the Spent Sorbent Regeneration Process (SSRP) to regenerate spent limesto… more
Date: August 1, 1992
Creator: Abbasian, J.; Hill, A. H. & Wangerow, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wet Chemical Etching Survey of III-Nitrides

Description: Wet chemical etching of GaN, InN, AlN, InAlN and InGaN was investigated in various acid and base solutions at temperatures up to 75 C. Only KOH-based solutions were found to etch AlN and InAlN. No etchants were found for the other nitrides, emphasizing their extreme lack of chemical reactivity. The native oxide on most of the nitrides could be removed in potassium tetraborate at 75 C, or HCl/H{sub 2}O at 25 C.
Date: February 4, 1999
Creator: Abernathy, C. R.; Cho, H.; Hays, D. C.; MacKenzie, J. D.; Pearton, S.J.; Ren, F. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

AmBe Waste Minimization Activities Annual Report

Description: The CST-11 objective for the Radioactive Source Recovery Project is to evaluate a nitric acid-based flowsheet and alternatives for dissolution, separation, and recovery of americium from AmBe neutron source materials returned from private and governmental institutions. Specific tasks performed during FY97 and FY98 included the experimental investigation of material dissolution rate and efficiency as a function of time and temperature for nitric acid as compared to hydrochloric acid. Alkaline di… more
Date: May 1, 1999
Creator: Abney, Kent D.; Svitra, Zita V. & Cisneros, Michael R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

PRELIMINARY REPORT ON EVALUATION OF POTENTIAL ELUANTS FOR NON-ACID ELUTION OF CESIUM FROM RESORCINOL-FORMALDEHYDE RESIN

Description: Small-column ion exchange (SCIX) units installed in high-level waste tanks to remove Cs-137 from highly alkaline salt solutions are among the waste treatment plans in the DOE-complex. Spherical Resorcinol-Formaldehyde (sRF) is the ion exchange resin selected for use in the Hanford Waste Treatment and Immobilization Plant (WTP). It is also the primary ion exchange material under consideration for SCIX at the Hanford site. The elution step of the multi-step ion exchange process is typically done … more
Date: September 1, 2010
Creator: Adu-Wusu, K. & Pennebaker, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Microstructural Properties of High Level Waste Concentrates and Gels with Raman And Infrared Spectroscopies

Description: Nearly half of the high level radioactive waste stored at Hanford is composed of highly alkaline concentrates referred to as either salt cakes or Double-Shell Slurry (DSS), depending on their compositions and processing histories. The major components of these concentrates are water, sodium hydroxide, and sodium salts of nitrate, nitrite, aluminate, carbonate, phosphate, and sulfate. In addition, there are varying amounts of assorted organic salts such as EDTA, glycolate, and citrate. Although … more
Date: June 1, 1999
Creator: Agnew, Stephen F. & Johnston, Clifford T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hydrothermal pretreatment of coal before molten caustic leaching

Description: A hydrothermal pretreatment of coal samples before caustic leaching results in efficient sulfur removal using reduced amounts of caustic and to recovery of a higher fraction of the energy content of the feed coal than caustic leaching without the pretreatment. Pretreating an Illinois No. 6 coal with boiling water followed by a float-sink separation using 50% aqueous NaOH as the heavy medium, and then leaching the floated coal with only the caustic adhering to the float portion (less than 1 part… more
Date: October 1, 1993
Creator: Akhtar, S. S. & Chriswell, C. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ultrafine calcium aerosol: Generation and use as a sorbent for sulfur in coal combustion. Volume 1, Experimental work: Final report, August 1, 1988--October 31, 1991

Description: Studies conducted at Ohio University and elsewhere have demonstrated that ultrafine aerosols, which have the highest surface area per unit mass, have enhanced potential to efficiently remove sulfur dioxide form combustion gases. Therefore it is proposed to generate a very fine aerosol calcium-rich sorbent (or similar aerosols) for gas conditioning. The aerosol will be generated by vaporization of the sorbent compound and subsequent homogeneous nucleation. In experimental studies liquids as well… more
Date: November 1, 1991
Creator: Alam, M. K.; Nahar, N. U.; Stewart, G. D. & Prudich, M. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ultrafine calcium aerosol: Generation and use of a sorbent for sulfur in coal combustion. Volume 2, Economics: Final report, August 1, 1988--October 31, 1991

Description: The goal of this study is to determine the cost effectiveness of using calcium-hydroxide powder sorbent in a commercial power plant flue gas desulfurization (FGD) application. The cost analysis methodology found herein is a direct application of the one found in the January 1986 report, ``Economic Evaluation of Dry-Injection Flue Gas Desulfurization Technology by the Electric Power Research Institute (EPRI). The EPRI study addresses the economic issue of installing a dry-injection FGD system on… more
Date: November 1, 1991
Creator: Alam, M. K.; Nahar, N. U.; Stewart, G. D. & Prudich, M. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Method for separating constituents from solution employing a recyclable Lewis acid metal-hydroxy gel

Description: This invention permits radionuclides, heavy metals, and organics to be extracted from solution by scavenging them with an amorphous gel. In the preferred embodiment, a contaminated solution (e.g. from soil washing, decontamination, or groundwater pumping) is transferred to a reaction vessel. The contaminated solution is contacted by the sequestering reagent which might contain for example, aluminate and EDTA anions in a 2.5 M NaOH solution. The pH of the reagent bearing solution is lowered on c… more
Date: December 31, 1995
Creator: Alexander, D. H.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Microstructural Characterization of Water-Rich Boehmite (AlO(OH)): TEM Correlation of Apparently Divergent XRD and TGA Results

Description: An understanding of the solid-phase thermodynamics and aqueous speciation of aluminum is critical to our ability to understand and predict processes in a wide variety of geologic and industrial settings. Boehmite (AIO(OH)) is an important phase in the system Al<sub>2</sub>O<sub>3</sub>-H<sub>2</sub>O that has been the subject of a number of structural and thermodynamic studies since its initial synthesis [l] and discovery in nature [2]. Unfortunately, it has long been recognized that thermograv… more
Date: August 1999
Creator: Allard, L. F.; Anovitz, L. M.; Benezeth, P.; Coffey, D. W.; Palmer, D. A.; Porter, W. D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hydride-catalyzed corrosion of plutonium by air: Initiation by plutonium monoxide monohydride

Description: Chemistry and kinetics of air reactions with plutonium monoxide monohydride (PuOH) and with mixtures of the oxide hydride and plutonium metal are defined by results of pressure-volume-temperature (PVT) measurements. Test with specimens prepared by total and partial corrosion of plutonium in 0.05 M sodium chloride solution show that reaction of residual water continues to generate H{sub 2} after liquid water is removed by evacuation. Rapid exposure of PuOH to air at room temperature does not pro… more
Date: June 1, 1998
Creator: Allen, Thomas H. & Haschke, John M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electrolytic Recycle Method for the Treatment of Radioactive Nitric Acid Waste. A Status Report at the Termination of the Project at KAPL

Description: A methed is descrihed for the treatment of radioactive neutralized nitric acid waste solutions. The process consists of electrolysis of sodium nitrate solutions and recycle the caustic formed to neutralize incoming nitric acid ate. Removal of a large fraction of the bulk inert substances by this method allows greater reductions in waste volume than conventional treatment by evaporation alone. Process chemistry studies show that a large fraction of the nitrate ion in alkaline solution can be ele… more
Date: June 26, 1957
Creator: Alter, H. W.; Barney, D. L.; Davidson, J. K.; Schafer, A. C., Jr. & Witt, F. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Potentials for fuel cells in refineries and chlor-alkali plants

Description: The market potentials for fuel cell cogeneration systems in petroleum refineries and chlor-alkali plants were evaluated. the most promising application appears to be in chlor-alkali plants where the production process is electricity intensive. Future anticipated changes in the production process are favorable to the use of fuel cells. The energy use in refineries is steam intensive with the required steam pressures ranging from approximately 15 to 650 psig. The near-term use of fuel cell cogene… more
Date: January 1, 1986
Creator: Altseimer, J.H. & Roach, F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effect of Operating Parameters and Chemical Additives on Crystal Habit and Specific Cake Resistance of Zinc Hydroxide Precipitates

Description: The effect of process parameters and chemical additives on the specific cake resistance of zinc hydroxide precipitates was investigated. The ability of a slurry to be filtered is dependent upon the particle habit of the solid and the particle habit is influenced by certain process variables. The process variables studied include neutralization temperature, agitation type, and alkalinity source used for neutralization. Several commercially available chemical additives advertised to aid in solid/… more
Date: August 1, 1999
Creator: Alwin, Jennifer Louise
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Synthesis and Characterization of Copper(II) Complexes

Description: A series of dihydroxy bridged copper(II) complexes of the type [(L)Cu(OH)₂Cu(L)]x₂ * nH₂0, where L is 2,2'-bipyridine, 4,4'-dimethyl-2,2'-bipyridine or 1,10-phenanthroline, x is a counter ion, and n is the number of water molecules, was synthesized. In the case of monohydroxy bridged copper(II) complexes, we have found a new method of synthesis for [ (L)₂Cu(OH)Cu(L)₂ ] (ClO₄)₃, where L is 2,2'-bipyridine or 1,10-phenanthroline. We have synthesized five new monohydroxy bridged copper(II) complex… more
Date: December 1984
Creator: Amani, Saeid
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Study of Substituted Benzenesulfonate-Containing Layered Double Hydroxides and Investigation of the Hexamethylenetetramine Route of LDH Synthesis

Description: Benzenesulfonates, para-substituted with amine, chloride and methyl groups were successfully incorporated into layered double hydroxides of two different compositions, 2:1 Mg-Al LDH and 2:1 Zn-Al LDH. These parent materials were also doped with small amounts of nickel and the differences in the two systems were studied. The hexamethylenetetramine route of layered double hydroxide synthesis was investigated to verify if the mechanism is indeed homogeneous. This included attempting preparation of… more
Date: May 2007
Creator: Ambadapadi, Sriram
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
Back to Top of Screen