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Selective Noncatalytic Reduction of NOx Using Ammonium Sulfate

Description: Article discusses how ammonium sulfate (AS) is of interest as an additive in stationary combustion plants for the simultaneous control of NOx (through selective noncatalytic reduction, SNCR) and deposition and corrosion (through sulfation of alkali chlorides). The results indicated that sulfur from ammonium sulfate is mainly released as SO3, even though SO2 is detected in increasing concentrations at temperatures above 1000 °C. This is the accepted manuscript version of the published article.
Date: July 15, 2021
Creator: Krum, Kristian R. K.; Jensen, Martin; Li, Songgeng; Norman, Thomas; Marshall, Paul; Wu, Hao et al.
Item Type: Refine your search to only Article
Partner: UNT College of Science
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The Fixation of Caesium on Australian Minerals. Part 2, Zeolite Minerals

Description: Samples from possible zoolite bearing deposits have been tested for cation exchange capacity using batch and column experiments. The best material, Eagleton Quarry pink shale, was given more exhaustive column tests to determine the effect of mineral particle size, influent flowrate, and the presence of competing cations on caseium breakthrough. Diffusion of caesium ions through the mineral particle controls the ion exchange process. At the optimum size of (-30+36) B.S.S. the cation exchange cap… more
Date: July 1963
Creator: Frost, C. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Fixation of Caesium on Australian Minerals. Part 1, Vermiculite Minerals

Description: Samples of vermiculite from Young River, W.A., and Kingaroy, Qld., have tested for cation exchange capacity using batch and column experiments. The better material, Young River vermiculite, was given more exhaustive column tests to determine the optimum particle size and to investigate its selectivity for caesium ions in the presence of higher concentrations of competing ions. At the optimum particle size of (-30+60) B.S.S. the cation exchange capacity of Young River vermiculite was approximate… more
Date: July 1963
Creator: Frost, C. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cation Exchange in Acetone-Water-Hydrochloric Acid

Description: Abstract: Distribution coefficients have been measured for the partition of metal ions between cation exchange resin and acetone-water-hydrochloric acid solutions. the differences in distribution coefficients of metal ions are greater in acetone-water media than in aqueous media of the same hydrochloric acid concentration. Using distribution coefficient data, conditions for column separations of mixtures can be selected. Column separations of metal ion mixtures can be effected by eluting wit… more
Date: May 10, 1962
Creator: Fritz, James S. (James Sherwood), 1924- & Rettig, Thomas A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Mass Spectra of Some Volatile Hydrides

Description: From abstract: "The hydrides of group VB an VB elements, except CH4 and NH3, have been prepared and, except for PbH4 and BiH3, their mass spectra studied. Fragmentation patterns and appearance potentials of the positive ions from these hydrides are reported. The ions have been tested for excess kinetic energy and this energy was found to be negligible. The average M-H bond energies and the ΔHf° obtained from appearance potential data agree well with values obtained by other methods. Evidence is… more
Date: March 19, 1962
Creator: Saalfeld, S. E. & Svec, Harry J. (Harry John), 1918-
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cation Exchange Separation of Divalent Metal Ions From Rare Earths

Description: From abstract: "The divalent metal ions of calcium, magnesium, nickel, and strontium are eluted from a cation exchange column with 1.5M nitric acid and separated from trivalent rare earths, aluminum and yttrium. Prior sequential elution of other metal ions with hydrochloric acid in acetone-water or with dilute hydrofluoric acid does not interfere with the present separation method."
Date: June 6, 1962
Creator: Fritz, James S. (James Sherwood), 1924- & Garralda, Barbara B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Inorganic Separations Using Ion Exchange

Description: From summary: "In previous project work, dilute mixtures of inorganic cations in aqueous solution have been concentrated by adsorption of the cations on a synthetic resin and they have been fractionated by selective desorption of the cations from the resin. In this report..the general procedure used in chemical separation, the equipment used, and the theory of the exchange equilibria and of the reaction rates are presented."
Date: August 29, 1946
Creator: Peterson, H. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Concentration of Plutonium by Cation Exchange Part I - New Elutriants

Description: From summary: "The concentration of plutonium by cation exchange was significantly improved by using a solution of ammonium lactate and sulfamate as the elutriant instead of nitric and sulfamic acids. The new elutriant permitted essentially complete elution of the plutonium and also avoided formation of gases in the resin bed during elution. At 45ºC, 2.8M ammonium lactate plus 0.15M ammonium sulfamate eluted 99.3 per cent of the total plutonium at an average concentration of 43.8 grams per lite… more
Date: December 1956
Creator: Bonner, Oscar D.; Burney, Glenn A. & Tober, Frank W., 1919-1995
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of impurities on PuO/sub 2/ dissolution in nitric-hydrofluoric acid solutions

Description: The effects of 0.10 M Cu/sup 2 +/, Hg/sup 2 +/, Zn/sup 2 +/, La/sup 3 +/, Ce/sup 3 +/, Al/sup 3 +/, Th/sup 4 +/,Zr/sup 4 +/, Cr/sup 3 +/, and Fe/sup 3 +/ on PuO/sub 2/ dissolution in 8.0M HNO/sub 3/--0.1M HF were investigated. Except for Cr/sup 3 +/ and Fe/sup 3 +/, the amount of Pu dissolved in 1 hour can be predicted by either log C(Pu) = -0.32 log K/sub F/ - 1.53 (K/sub F/ = first stability constant for the impurity metal fluoride complex) or log C(Pu) = -0.5 Z/sup 2//d-1.11 (Z = ionic charg… more
Date: January 1, 1976
Creator: Tallent, O. K. & Mailen, J. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Exchange of lyotropic series cations by micaceous vermiculite and its weathering products determined by electron microscopy and radiochemical analysis. Progress report, August 1, 1974--October 31, 1977

Description: Determination of layer charge of micas by /sup 235/U fission particle tracks (thermal neutron activated) was completed by a development of a unique method of UO/sup 2 +/ saturation at pH 2.4 and removal of excess salts physically. The U content and age-dating of soil micas was also accomplished by fission particle counting. Thermodynamic metastability of micaceous vermiculite in soils with reversible mica-vermiculite reactions were found to result in extremely tenacious natural fixation of Cs/s… more
Date: January 1, 1977
Creator: Jackson, M L & Helmke, P A
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dissociation of fast molecular-ion beams in thin foils. [1 MeV/nucleon]

Description: Distributions in angle and in energy were measured for the break-up fragments produced when fast (approximately MeV/nucleon) beams of molecular ions (H/sub 2//sup +/, HeH/sup +/, OH/sup +/, etc.) bombard thin foil targets. Studies were made using both amorphous and crystalline targets. The results display some dramatic departures from expectations based on a simple Coulomb explosion picture in which a cluster of nuclei stripped of their binding electrons move apart under the influence of their … more
Date: January 1, 1976
Creator: Gemmell, D. S.; Vager, Z. & Zabransky, B. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Drying of ion-exchange resins for resin-based preparation of nuclear reactor fuels

Description: The reference fuel kernel for recycle of /sup 233/U to HTGRs (High Temperature Gas-Cooled Reactors) is prepared by loading carboxylic acid cation-exchange resins with uranium and carbonizing at controlled conditions. The loaded, dried resin must meet specifications for sphericity, composition, and other properties. Microwave heating is used to give controlled and reproducible drying of 11-liter batches of uranium-loaded (4 kg of uranium) resin in a vessel of safe dimensions for nuclear critical… more
Date: January 1, 1976
Creator: Drago, J. P.; Haas, P. A. & Million, D. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Technical progress report, October 1, 1974--September 30, 1975. [Summaries of research activities at Wisconsin Univ]

Description: Six areas of research are reported: I. Equilibrium fractions of D/sup -/ ions when D/sup +/, D/sub 2//sup +/ or D/sub 3//sup +/ ions are incident on a Cs vapor target. II. Charge exchange collisions when hydrogen and deuterium ions are incident on a Cs vapor target, in which the total charge exchange cross sections sigma/sub +/sub 0// for H/sup +/, H/sub 2//sup +/, D/sup +/, D/sub 2//sup +/, are reported. III. Charge exchange cross sections with rare gas ions incident on a Cs vapor target for H… more
Date: January 1, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mechanisms for radiation damage in DNA constituents and DNA: reactions of the N/sub 1/-substituted thymine. pi. -cation radicals

Description: Reactions of the N/sub 1/-substituted thymine ..pi..-cation radicals were investigated by ESR in several aqueous glasses. In 8M NaOD (NaOH) spectra suggestive and OD/sup -/(OH/sup -/) addition to position 6 in the ..pi..-cations of 1-methylthymine, and thymidine were found immediately after uv photolysis at 77/sup 0/K. Production of the same radicals by electron attachment to 1-methyl-5-bromo-6-hydroxythymine, and 5-bromo-6-hydroxythymidine in 8M NaOD confirms the OD/sup -/ addition mechanism. … more
Date: January 1, 1977
Creator: Sevilla, M. D. & Engelhardt, M. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Gd/sup 3 +/ EPR probe of the determination of the valence states

Description: The theory of the Gd/sup 3 +/ probe EPR technique is reviewed. This technique was employed to investigate at 9.2 GHz the Gd/sup 3 +/ EPR in 0.1 at. percent GdS in TmS, 1 at. percent GdTe in TmTe, and 1 at. percent GdSe in TmSe. From the temperature dependence of the Gd/sup 3 +/ EPR linewidth, it is concluded that Tm in TmS is trivalent with a singlet-ground-state. The temperature variation of the Gd/sup 3 +/ linewidth in TmTe was interpreted in terms of the ''delocalization'' of the extra elect… more
Date: January 1, 1976
Creator: Huang, C. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurements of distributions of energy loss and additivity of energy loss for 50 to 150 keV protons in hydrogen and nine hydrogen gases

Description: Detailed measurements of energy-loss distributions were made for 51, 102 and 153 keV protons traversing hydrogen, methane, ethyne, ethene, ethane, propyne, propadiene, propene, cyclopropane and propane. Less detailed measurements were made at 76.5 and 127.5 keV. To simplify comparison with theory, all of the measurements were made at a gas density that gave a 4% energy loss. The mean energy, second central moment (a measure of the width of the distribution) and the third central moment (a measu… more
Date: January 1, 1976
Creator: Thorngate, J. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Data base dictionary for the Oak Ridge Reservation Hydrology and Geology Study Groundwater Data Base

Description: The Oak Ridge Reservation Hydrology and Geology Study (ORRHAGS) Groundwater Data Base has been compiled to consolidate groundwater data from the three US Department of Energy facilities located on the Oak Ridge Reservation: the Oak Ridge K-25 Site, the Oak Ridge National Laboratory, and the Oak Ridge Y-12 Plant. Each of these facilities maintains its own groundwater and well construction data bases. Data were extracted from the existing data bases, converted to a consistent format, and integrat… more
Date: April 1, 1993
Creator: Thompson, B. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Efficient production of neutral beams by photodetachment of negative ions

Description: A neutral fraction approaching 97 percent can be attained by photodetachment of negative ions if the photon density and thickness are adequate. This high efficiency of neutralization is desirable not only because of the improvement in power balance and power efficiency but also because of the increase in the useable beam current per module. Only modest improvements in commercial solid-state lasers are required to fulfill the requirements of a photodetachment cell for a fusion reactor. The wavel… more
Date: August 15, 1977
Creator: Fink, J. H. & Hamilton, G. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Evaluation of process variables in the cation exchange recovery of plutonium from 234-5 building sump water

Description: A previously reported cation exchange process for the recovery of Pu from sump water was studied in order to improve the procedure. The flowsheet calls for adjustment to 0.03M HNO/sub 3/, the addition of NH/sub 4/HSO/sub 3/ for Pu reduction, the addition of Al/sup 3 +/ to complex F/sup -/, followed by passage of the solution through a column of Dowex 50W, X-8 resin. Distribution coefficients were measured between the resin and synthetic sump solutions under a variety of possible simulated flows… more
Date: July 29, 1966
Creator: Ryan, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental measurements of negative hydrogen ion production from surfaces

Description: Experimental measurements of the production of H/sup -/ from surfaces bombarded with hydrogen are reviewed. Some measurements of H/sup +/ and H/sup 0/ production from surfaces are also discussed with particular emphasis on work which might be relevant to ion source applications.
Date: September 1, 1977
Creator: Graham, W. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Valence and ionic size of aqueous actinide ions

Description: A comparison of crystallographic radii of actinide ions with their stability in aqueous solutions shows that except for Ac/sup 3 +/ and Th/sup 4 +/, the simple actinide ions stable in aqueous solutions have ionic radii between 0.93 and 1.05 A. Extrapolation of crystal radii to the heavy actinides suggests that 2+ ions of Fm, Es, and possibly Cf could exist in aqueous solutions, and that 4+ ions of elements heavier than Cf would be unstable.
Date: January 1, 1976
Creator: Karraker, D. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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