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in subjects: "Calcium Compounds"

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Integrated dry NO{sub x}/SO{sub 2} emissions control system calcium-based dry sorbent injection. Test report, April 30--November 2, 1993

The DOE sponsored Integrated Dry NO{sub x}SO{sub 2} Emissions Control System program, which is a Clean Coal Technology III demonstration, is being conducted by Public Service Company of Colorado. The test site is Arapahoe Generating Station Unit 4, which is a 100 MWe, down-fired utility boiler burning a low sulfur Western coal. The project goal is to demonstrate up to 70 percent reductions in NO{sub x} and SO{sub 2} emissions through the integration of: (1) down-fired low-NO{sub x} burners with… more

Date: December 1, 1994

Creator: Shiomoto, G. H.; Smith, R. A.; Muzio, L. J. & Hunt, T.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Oxygen reduction at a YSZ interface with cathode materials La{sub 1-x}(Ca or Sr){sub x}MnO{sub 3} or Y{sub 1-x}CaMnO{sub 3}

Impedance spectroscopy combined with an unbonded interface cell (UIC) design, was used to assess oxygen reduction at an yttria-stabilized zirconia electrolyte interface with several substituted yttrium and lanthanum manganite cathode compositions. By analyzing impedance spectra taken using the UIC, effective length of reaction zone at the solid-gas triple phase boundary can be estimated and used to normalize the oxygen reduction reaction rate for each cell, thus effectively removing effect of i… more

Date: September 1, 1993

Creator: Youngblood, G. E.; Windisch, C. F. Jr. & Bates, J. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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DUSEL Facility Cooling Water Scaling Issues

Precipitation (crystal growth) in supersaturated solutions is governed by both kenetic and thermodynamic processes. This is an important and evolving field of research, especially for the petroleum industry. There are several types of precipitates including sulfate compounds (ie. barium sulfate) and calcium compounds (ie. calcium carbonate). The chemical makeup of the mine water has relatively large concentrations of sulfate as compared to calcium, so we may expect that sulfate type reactions. … more

Date: April 5, 2011

Creator: Daily, W D

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Irradiation-induced amorphization of Ca[sub 2]La[sub 8](SiO[sub 4])[sub 6]O[sub 2] single crystals

Single crystals of Ca[sub 2]La[sub 8](SiO[sub 4])[sub 6]O[sub 2] were irradiated with 1.5 MeV Xe[sup +], 1.5 MeV Kr[sup +], 1.0 MeV Ar[sup +], and 0.8 MeV Ne[sup +] ions to investigate the effects of recoil-energy spectrum, temperature, and crystallographic orientation on irradiation-induced amorphization. The irradiations were carried out using the HVEM-Tandem Facility at Argonne National Laboratory. The structural changes and the ion fluence for complete amorphization in the electron transpar… more

Date: November 1, 1992

Creator: Weber, W. J. & Wang, Lu-Min

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Gasification combined cycle: Carbon dioxide recovery, transport, and disposal

The objective of the project is to develop engineering evaluations of technologies for the capture, use, and disposal of carbon dioxide (CO{sub 2}). This project emphasizes CO{sub 2}-capture technologies combined with integrated gasification combined-cycle (IGCC) power systems. Complementary evaluations address CO{sub 2} transportation, CO{sub 2} use, and options for the long-term sequestering of unused CO{sub 2}. Commercially available CO{sub 2}-capture technology is providing a performance an… more

Date: September 1, 1994

Creator: Doctor, R. D.; Molburg, J. C.; Thimmapuram, P. R.; Berry, G. F. & Livengood, C. D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Heterogeneous nucleation of calcium oxalate on native oxide surfaces

The aqueous deposition of calcium oxalate onto colloidal oxides has been studied as a model system for understanding heterogeneous nucleation processes of importance in biomimetic synthesis of ceramic thin films. Calcium oxalate nucleation has been monitored by measuring induction times for nucleation using Constant Composition techniques and by measuring nucleation densities on extended oxide surfaces using an atomic force microscope. Results show that the dependence of calcium oxalate nucleat… more

Date: April 1, 1994

Creator: Song, L.; Pattillo, M. J.; Graff, G. L.; Campbell, A. A. & Bunker, B. C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Stabilization of spent calcium-based sorbent

The overall objective of this project is to obtain experimental data on the reactions of calcium-based sorbents applicable to both air-blown coal gasification systems and second generation fluid bed coal combustion systems (partial gasification). The project is a 40-month effort. A key technical issue for the utilization of calcium sorbents in advanced coal technologies is the subsequent stabilization of the solid wastes (calcium sulfide/ash) produced by such systems.

Date: October 1, 1994

Creator: Shires, P. J.; Katta, S. & Henningsen, G. B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Enhancing the use of coals by gas reburning-sorbent injection. Quarterly report No. 24, July 1--September 30, 1993

The objective of this project is to evaluate and demonstrate a cost effective emission control technology for acid rain precursors, oxides of nitrogen (NO{sub x}) and sulfur (SO{sub x}), on two coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices: tangential and cyclone fired. The specific objectives are to demonstrate reductions of 60 percent in NO{sub x} and 50 percent in SO{sub x} emissions, by a combination of two developed technologies,… more

Date: October 15, 1993

Item Type: Report

Partner: UNT Libraries Government Documents Department

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MHD seed recovery/regeneration, Phase 2

Three tasks are reported on: design, refurbish, operate potassium formate system; design, construct, operate the calcium formate production POC; and Western seed studies (spent Western seed is a mixture of potassium carbonate and potassium sulfate plus inerts).

Date: January 1, 1992

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

DT fusion neutron irradiation of LLL stainless steel, LASL MgO, YAG, sapphire and spinel, and LLL CaF/sub 2/ and suprasil

The DT fusion neutron irradiation of nine LLL stainless steel samples (including six tensile specimens), four LASL high purity single crystals (one each of MgO, YAG, Sapphire and Spinel), ten LLL silica samples, and seven LLL calcium fluoride samples is described. The sample position, beam-on time, and neutron dose record are given. The maximum neutron fluence on any sample was 1.39 x 10/sup 17/ neutron/cm/sup 2/.

Date: May 18, 1977

Creator: MacLean, Susan C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Microstructural characterization of Ag-sheathed Tl-Ba-Ca-Cu-O and Bi-Sr-Ca-Cu-O superconducting tapes by analytical electron microscopy

The microstructures of Tl(1223) and Pb-doped Bi(2223) silver tapes produced by the powder-in-tube (PM) method have been examined by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive spectrometry (EDS). The Tl tapes annealed below the melting point exhibited fine grains and a high density of pores while tapes subjected to partial melting prior to solid state annealing were fully dense with large grains. However, these tapes also showed an increase i… more

Date: September 1, 1992

Creator: Hu, J. G.; Miller, D. J.; Goretta, K. C. & Poeppel, R. B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

I. The indicatrix of composite crystals. II. Calculation of the indicatrix of silicate minerals with the classical point-dipole model. III. The structure of two sodium-uranyl fluorides

The results of three distinct studies are discussed. The first two chapters describe calculations of the geometric optical properties of crystals; the third chapter is concerned with the crystal structure analysis of two new double salts.

Date: April 1, 1977

Creator: Hauser, J. R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Synthesis and properties of polycrystalline Tl sub 2 Ba sub 2 CaCu sub 2 O sub x and Tl sub 2 Ba sub 2 Ca sub 2 Cu sub 3 O sub x

Polycrystalline samples of Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub x} and Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub x} superconductors with high (>95 wt %) phase purity were prepared by a solid state reaction of Tl{sub 2}O{sub 3} with a mixture of BaCuO{sub 2}, Ca{sub 2}CuO{sub 3}, and CuO. Starting compositions of Tl{sub 1+{delta}}BaCaCu{sub 2}O{sub x} and Tl{sub 2+{delta}}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub x} were fired in semi-sealed reaction vessels for durations of 12 to 48 hours in flowing oxyge… more

Date: January 1, 1990

Creator: Vogt, G. J. & Phillips, D. S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Cementing operations on Fenton Hill during FY1987, 1 October 1986-September 1987

As part of repairing and sidetracking EE-2 geothermal well, a number of cementing operations were successfully carried out. These included; plugging back of EE-2 below the proposed side track site, cement behind casing at 10220-24 ft, cement behind casing at 9800-04 ft, whipstock plug, and the cementing through perforations of the 9-5/8 in. casing from 6500 ft to the surface. Specific data on each of these operations is given, and the results discussed. 1 ref., 4 figs.

Date: January 1, 1988

Creator: Cocks, G. G.; Dreesen, D. S.; Gill, P. J. & Root, R. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Intermediate temperature electrolytes for SOFC

The objective of this work is to identify a new set of materials that would allow the operation of the solid oxide fuel cell in the 600--800{sup degrees}C temperature range. The approach that is being used is to start with a systematic evaluation of new electrolyte materials and then to develop compatible electrode and interconnect materials.

Date: January 1, 1992

Creator: Bloom, I.; Krumpelt, M.; Hash, M. C.; Zebrowski, J. P. & Zurawski, D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Hydrothermal reactions of fly ash. [Quarterly] report, April 1, 1993--June 31, 1993

Reactions which occur when fly ash is treated under hydrothermal conditions are being investigated, in order to determine the nature of the phases that form, assess the stabilities of these phases in the ambient environment and, finally, assess whether these phases are capable of sequestering hazardous species. Another reason for undertaken this proposed study is that, depending on the composition of the ash and the presence of selected additives, it may be possible under hydrothermal condition… more

Date: September 1, 1993

Creator: Brown, P. W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Melt processing of the Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub y] superconductor in oxygen and argon atmospheres

Solidification and subsequent annealing of Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub y] (2212) in oxygen and argon atmospheres were investigated in order to identify alternative processing routes for controlling microstructures and superconducting properties. In addition to 2212, several other phases formed on cooling in O[sub 2] and did not disappear upon subsequent annealing. Crystallization in Ar resulted in a divorced eutetic structure of Bi[sub 2]Sr[sub 3-x]Ca[sub x]O[sub y] and Cu[sub 2]O/CuO. T… more

Date: August 1, 1992

Creator: Holesinger, T. G.; Miller, D. J. (Argonne National Lab., IL (United States)) & Chumbley, L. S. (Ames Lab., IA (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Confined zone dispersion flue gas desulfurization demonstration. [Numerical data only; no text]

Report contains only numerical data, no text.

Date: February 27, 1992

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Advanced turbine design for coal-fueled engines

The objective of this task is to perform a technical assessment of turbine blading for advanced second generation PFBC conditions, identify specific problems/issues, and recommend an approach for solving any problems identified. A literature search was conducted, problems associated with hot corrosion defined and limited experiments performed. Sulfidation corrosion occurs in industrial, marine and aircraft gas turbine engines and is due to the presence of condensed alkali (sodium) sulfates. The… more

Date: July 17, 1992

Creator: Bornstein, N. S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Materials compatibility during the chlorination of molten CaCl/sub 2/. CaO salts. [CaCl/sub 2/. CaO salt]

As part of our effort to develop a semicontinuous PuO/sub 2/ reduction process, we are investigating promising materials for containing a 900/sup 0/C molten CaCl/sub 2/ . CaO chlorination reaction. We want the material to contain this reaction and to be reusable. We tested candidate materials in a simulated salt (no plutonium) using anhydrous HCl as the chlorinating agent. Data are presented on the performance of 36 metals and alloys, 9 ceramics, and 3 coatings.

Date: January 1, 1987

Creator: Rense, Charles E. C.; Fife, Keith W.; Bowersox, David F. & Ferran, Michelle D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Determining the Structure of Biomaterials Interfaces using Synchrotron-based X-ray Diffraction

The purpose of this project is to explore the feasibility of using surface X-ray diffraction (SXRD) to determine the structure of biomineral surfaces in electrolyte solutions and of the adsorbed layer of acidic amino acids that are believed to play a central role in the control of biomineral formation and function. The work is a critical component in the development of an integrated picture of the physical and chemical basis for deposition and dissolution at solid-liquid interfaces in biologica… more

Date: January 24, 2002

Creator: McBride, M

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Regenerative process for desulfurization of high temperature combustion and fuel gases. Quarterly progress report No. 2, July 1--September 30, 1976

Laboratory facilities and equipment have been acquired and are being installed. The feasibility of using dicalcium silicate as a SO/sub 2/ sorbent at about 800/sup 0/C has been determined. A preliminary flow sheet describing the process has been prepared. Tasks for the next quarter are planned.

Date: January 1, 1976

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Integrated Dry NO{sub x}/SO{sub 2} Emissions Control System. Quarterly report No. 7, July 1--September 30, 1992

Public Service Company of Colorado is continuing management of the Integrated Dry NO{sub x}/SO{sub 2} Emissions Control System. The major emphasis this quarter has been on completion of the remaining construction of the system and startup and checkout of the equipment. The low-NO{sub x} burners have operated since their startup on May 30, 1992 without problem and no unit outages have been experienced due to their operation. All combustion system punch list items have been complete and plant man… more

Date: June 4, 1993

Item Type: Report

Partner: UNT Libraries Government Documents Department

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MHD seed recovery/regeneration. Phase 2, Technical progress report, quarter ending May 1993

The following tasks are reported: Design, refurbish, operation potassium formate (``backend``) system (Seed Regeneration Proof-of- Concept Facility); design, construct, operate calcium formate production POC (``frontend``) unit; project management and control; and Western seed studies.

Date: November 1, 1993

Item Type: Report

Partner: UNT Libraries Government Documents Department