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Vertical borehole design and completion practices used to remove methane gas from mineable coalbeds

Description: Coalbed gas drainage from the surface in advance of mining has long been the goal of researchers in mine safety. Bureau of Mines efforts to achieve this goal started about 1965 with the initiation of an applied research program designed to test drilling, completion, and production techniques for vertical boreholes. Under this program, over 100 boreholes were completed in 16 different coalbeds. The field methods derived from these tests, together with a basic understanding of the coalbed reservo… more
Date: August 1, 1980
Creator: Lambert, S. W.; Trevits, M. A. & Steidl, P. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Calcium and zinc adsorption by iron hydrous oxide gel

Description: In the presence of 1M NaNO/sub 3/, freshly precipitated iron hydrous oxide gel suspensions (0.093M Fe) selectively adsorbed Ca and Zn over a wide concentration range. Adsorption was highly pH dependent, especially for Zn. For Ca, the pH at which 50% adsorption occurred, pH/sub 50/, varied from pH 7.15 at 2 x 10/sup -6/M Ca (total) to pH 9.55 at 10/sup -2/M Ca, whereas for Zn, the pH/sub 50/ values varied from pH 5.00 at approx. 10/sup -7/M Zn to pH 6.25 at 10/sup -2/M Zn. Adsorption isotherms f… more
Date: January 1, 1980
Creator: Kinniburgh, D G & Jackson, M L
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Irreversible effects in the FeTi/H system

Description: The equilibrium hydrogen absorption isotherm using annealed, strain-free FeTi, exhibits only one plateau up to a composition of FeTiH/sub 1.95/. However, the desorption isotherm, determined immediately after the first hydriding step, exhibits the usual two plateaux. X-ray diffraction results of samples with compositions within the absorption plateau limits indicate the major phases present to be ..cap alpha.. and ..gamma.., although a small amount of ..beta.. phase was always detected. Apparent… more
Date: March 1, 1982
Creator: Reilly, J. J.; Johnson, J. R.; Lynch, J. F. & Reidinger, F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Studies in Coal Liquefaction With Application to the SRC and Related Processes. Quarterly Report, May-July 1983

Description: This report examines liquid-phase adsorption as a possible method of studying the interactions between coal liquids and hydrotreating catalysts. The duel purposes of this work are to develop a method to determine specific surface areas of porous catalysts and to examine how compounds commonly found in coal liquids are adsorbed on hydrotreating catalysts. The liquid-phase adsorption studies were performed at room temperature in tubing bomb reactors. Adsorption isotherms obtained from these exper… more
Date: March 1, 1984
Creator: Tarrer, A. R.; Guin, J. A. & Curtis, C. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Developments and Applications of Electrophoresis and Small Molecule Laser Desorption Ionization Mass Spectrometry

Description: Ultra-sensitive native fluorescence detection of proteins with miniaturized one- and two-dimensional polyacrylamide gel electrophoresis was achieved with laser side-entry excitation, which provides both high excitation power and low background level. The detection limit for R-phycoerythrin protein spots in 1-D SDS-PAGE was as low as 15 fg, which corresponds to 40 thousand molecules only. The average detection limit of six standard native proteins was 5 pg per band and the dynamic range spanned … more
Date: December 1, 2007
Creator: Zhang, Hui
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Using Biosurfactants Produced from Agriculture Process Waste Streams to Improve Oil Recovery in Fractured Carbonate Reservoirs

Description: This report describes the progress of our research during the first 30 months (10/01/2004 to 03/31/2007) of the original three-year project cycle. The project was terminated early due to DOE budget cuts. This was a joint project between the Tertiary Oil Recovery Project (TORP) at the University of Kansas and the Idaho National Laboratory (INL). The objective was to evaluate the use of low-cost biosurfactants produced from agriculture process waste streams to improve oil recovery in fractured ca… more
Date: January 7, 2009
Creator: Johnson, Stephen; Salehi, Mehdi; Eisert, Karl & Fox, Sandra
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MODELING AN ION EXCHANGE PROCESS FOR CESIUM REMOVAL FROM ALKALINE RADIOACTIVE WASTE SOLUTIONS

Description: The performance of spherical Resorcinol-Formaldehyde ion-exchange resin for the removal of cesium from alkaline radioactive waste solutions has been investigated through computer modeling. Cesium adsorption isotherms were obtained by fitting experimental data using a thermodynamic framework. Results show that ion-exchange is an efficient method for cesium removal from highly alkaline radioactive waste solutions. On average, two 1300 liter columns operating in series are able to treat 690,000 li… more
Date: August 26, 2008
Creator: Smith, F; Luther Hamm, L; Sebastian Aleman, S & Johnston Michael, J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Adsorption of Pure Methane, Nitrogen, and Carbon Dioxide and Their Mixtures on San Juan Basin Coal

Description: The major objectives of this project were to (a) measure the adsorption behavior of pure methane, nitrogen, CO{sub 2} and their binary and ternary mixtures on wet Tiffany coal at 130 F and pressures to 2000 psia; (b) correlate the equilibrium adsorption isotherm data using the extended Langmuir model, the Langmuir model, the loading ratio correlation and the Zhou-Gasem-Robinson equation of state; and (c) establish sorption-time estimates for the pure components. Specific accomplishments are sum… more
Date: March 1, 2002
Creator: Gasem, K. A. M.; Robinson, R. L. & Reeves, S. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermodynamic and kinetic observations on LiAlO/sub 2/: Adsorption, dissolution, and evolution of water vapor

Description: Accounting for the tritium inventory in the tritium breeding blanket of a fusion reactor requires, among other things, knowledge of the adsorption-desorption characteristics of tritium-containing species on the breeder surface, the solubility of triotoxide and tritide in the bulk breeder, and the kinetics of various processes that transport tritium out of the breeder. An experimental study on LiAlO/sub 2/ is presented that provides information for the thermodynamics of adsorption of H/sub 2/O(g… more
Date: January 1, 1987
Creator: Fischer, A. K. & Johnson, C. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Study of the surface properties of ceramic materials by chromatography

Description: Most fundamental research on adsorption assumes adsorbent surfaces to be homogeneous. Material chemists have been able to design and prepare a variety of adsorbents with a highly homogeneous surface. These adsorbents are widely used in chromatography and in adsorption studies, contributing to further anchor the idea that homogeneous surfaces are the most frequent case. In reality, many common materials used as finely divided powders such as pigments, fillers, ceramics, or involved in industrial… more
Date: March 1, 1992
Creator: Guiochon, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Technical Report - Final report

Description: This project was a collaborative effort between Dr Teresa Burns and Dr John Larese to study the physisorption of polar molecules on ionic substrates. The work will be completed at both Coastal Carolina University and Brookhaven National Laboratory. The goals of the research are: 1) to provide detailed thermodynamic information about dipolar molecules adsorbed on ionic substrates, critical to accurately modeling the systems of interest using a spin-1 Ising model; 2) to study the structure of the… more
Date: October 30, 2008
Creator: Burns, Teresa
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Computational investigation of noble gas adsorption and separation by nanoporous materials.

Description: Molecular simulations are used to assess the ability of metal-organic framework (MOF) materials to store and separate noble gases. Specifically, grand canonical Monte Carlo simulation techniques are used to predict noble gas adsorption isotherms at room temperature. Experimental trends of noble gas inflation curves of a Zn-based material (IRMOF-1) are matched by the simulation results. The simulations also predict that IRMOF-1 selectively adsorbs Xe atoms in Xe/Kr and Xe/Ar mixtures at total fe… more
Date: October 1, 2008
Creator: Allendorf, Mark D. (Sandia National Laboratories, Livermore, CA); Sanders, Joseph C. & Greathouse, Jeffery A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Final report : LDRD project 79824 carbon nanotube sorting via DNA-directed self-assembly.

Description: Single-wall carbon nanotubes (SWNTs) have shown great promise in novel applications in molecular electronics, biohazard detection, and composite materials. Commercially synthesized nanotubes exhibit a wide dispersion of geometries and conductivities, and tend to aggregate. Hence the key to using these materials is the ability to solubilize and sort carbon nanotubes according to their geometric/electronic properties. One of the most effective dispersants is single-stranded DNA (ssDNA), but there… more
Date: October 1, 2007
Creator: Robinson, David B; Leung, Kevin; Rempe, Susan B.; Dossa, Paul D.; Frischknecht, Amalie Lucile & Martin, Marcus Gary
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Enhanced Activity of Nanocrystalline Zeolites for Selective Catalytic Reduction of NOx

Description: Nanocrystalline zeolites with discrete crystal sizes of less than 100 nm have different properties relative to zeolites with larger crystal sizes. Nanocrystalline zeolites have improved mass transfer properties and very large internal and external surface areas that can be exploited for many different applications. The additional external surface active sites and the improved mass transfer properties of nanocrystalline zeolites offer significant advantages for selective catalytic reduction (SCR… more
Date: December 31, 2006
Creator: Larson, Sarah C. & Grassian, Vicki H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of Devonian Black Shales in Kentucky for Potential Carbon Dioxide Sequestration and Enhanced Natural Gas Production

Description: Carbonaceous (black) Devonian gas shales underlie approximately two-thirds of Kentucky. In these shales, natural gas occurs in the intergranular and fracture porosity and is adsorbed on clay and kerogen surfaces. This is analogous to methane storage in coal beds, where CO2 is preferentially adsorbed, displacing methane. Black shales may similarly desorb methane in the presence of CO2. Drill cuttings from the Kentucky Geological Survey Well Sample and Core Library were sampled to determine both … more
Date: September 30, 2005
Creator: Nuttall, Brandon C.; Eble, Cortland F.; Drahovzal, James A. & Bustin, R. Marc
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of Fly Ash Derived Sorbents to Capture CO2 from Flue Gas of Power Plants

Description: This research program focused on the development of fly ash derived sorbents to capture CO{sub 2} from power plant flue gas emissions. The fly ash derived sorbents developed represent an affordable alternative to existing methods using specialized activated carbons and molecular sieves, that tend to be very expensive and hinder the viability of the CO{sub 2} sorption process due to economic constraints. Under Task 1 'Procurement and characterization of a suite of fly ashes', 10 fly ash samples,… more
Date: December 31, 2003
Creator: Maroto-Valer, M. Mercedes; Andresen, John M.; Zhang, Yinzhi & Lu, Zhe
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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NOx Control Options and Integration for US Coal Fired Boilers: Final Report

Description: This is the Final Report for DOE Cooperative Agreement No: DE-FC26-00NT40753. The goal of the project was to develop cost-effective analysis tools and techniques for demonstrating and evaluating low-NOx control strategies and their possible impact on boiler performance for boilers firing US coals. The Electric Power Research Institute (EPRI) provided co-funding for this program. This project included research on: (1) In furnace NOx control; (2) Impacts of combustion modifications on boiler oper… more
Date: June 30, 2006
Creator: Bockelie, Mike; Cremer, Marc; Davis, Kevin; Denison, Martin; Sarofim, Adel; Senior, Connie et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Carbon Tetrachloride Partition Coefficients Measured by Aqueous Sorption to Hanford Sediments from Operable Units 200-UP-1 and 200-ZP-1

Description: Kd values obtained on sediment samples from 200-UP-1 and 10-ZP-1 contribute to a larger Kd database that exists for other Hanford sediments, and contains significant desorption data for CCl4. Adsorption results presented here validate the use of a linear adsorption isotherm (Kd) to predict short contact time CCl4 adsorption to sediments in 200-UP-1 groundwater plume for a distinct ranges in CCl4 concentration. However, this does not imply that values of Kd will be constant if the groundwater ch… more
Date: September 30, 2007
Creator: Wellman, Dawn M.; Riley, Robert G.; Cordova, Elsa A.; Parker, Kent E. & Mitroshkov, Alexandre V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Adsorption of Carbon Tetrachloride to Sediments from the UP-1 Operable Unit

Description: In 2004, Fluor Hanford, Inc. (FHI) drilled several groundwater wells within the 200-UP-1 operable unit to monitor plumes that have been the focus of past remediation activities. Thirteen cores taken from three wells (C4298, C4299, and C4300) were sent to Pacific Northwest National Laboratory for characterization and quantification of contaminant retardation. These cores were 4-inches in diameter by 6-inches in length and were taken from depths near the unconfined aquifer surface (water table) t… more
Date: September 30, 2006
Creator: Wellman, Dawn M.; Riley, Robert G.; Parker, Kent E. & Mitroshkov, Alexandre V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Monodisperse Platinum and Rhodium Nanoparticles as Model Heterogeneous Catalysts

Description: Model heterogeneous catalysts have been synthesized and studied to better understand how the surface structure of noble metal nanoparticles affects catalytic performance. In this project, monodisperse rhodium and platinum nanoparticles of controlled size and shape have been synthesized by solution phase polyol reduction, stabilized by polyvinylpyrrolidone (PVP). Model catalysts have been developed using these nanoparticles by two methods: synthesis of mesoporous silica (SBA-15) in the presence … more
Date: August 15, 2008
Creator: Coble, Inger M
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Sorption-capacity limited retardation of radionuclides transport in water-saturated packing materials

Description: Radionuclides breakthrough times as calculated through constant retardation factors obtained in dilute solutions are non-conservative. The constant retardation approach regards the solid as having infinite sorption capacity throughout the solid. However, as the solid becomes locally saturated, such as in the proximity of the waste form-packing materials interface, it will exhibit no retardation properties, and transport will take place as if the radionuclides were locally non-reactive. The magn… more
Date: January 1, 1984
Creator: Pescatore, C. & Sullivan, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Polymers as advanced materials for desiccant applications

Description: This research is concerned with solid materials used as desiccants for desiccant cooling systems (DCSs) that process water vapor in an atmosphere to produce cooling. Background information includes an introduction to DCSs and the role of the desiccant as a system component. The water vapor sorption performance criteria used for screening the modified polymers prepared include the water sorption capacity from 5% to 80% relative humidity (R.H.), isotherm shape, and rate of adsorption and desorpti… more
Date: December 1, 1990
Creator: Czanderna, A.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A new phase in palladium hydride technology

Description: Two plateaux are observed in both the absorption and desorption isotherms of palladium hydride. For the absorption isotherm, a change in plateau pressure is observed at a hydrogen-to-metal (H/M) ratio of about 0.35 for all temperatures studied. For the desorption isotherm, the change in plateau pressure appears to be a function of temperature, ranging from an H/M ratio of 0.18 at 80{degrees}C to 0.3 at 140{degrees}C. These data are interpreted as being experimentally observed boundaries to an e… more
Date: January 1, 1991
Creator: Walters, R.T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Active sites in char gasification: Final technical report

Description: Among the key variables in the design of gasifiers and combustors is the reactivity of the chars which must be gasified or combusted. Significant loss of unburned char is unacceptable in virtually any process; the provision of sufficient residence time for complete conversion is essential. A very wide range of reactivities are observed, depending upon the nature of the char in a process. The current work focuses on furthering the understanding of gasification reactivities of chars. It has been … more
Date: September 1, 1987
Creator: Wojtowicz, M.; Lilly, W. D.; Perkins, M. T.; Hradil, G.; Calo, J. M. & Suuberg, E. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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