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Development of an Ultra-fine Coal Dewatering Technology and an Integrated Flotation-Dewatering System for Coal Preparation Plants

Description: The project proposal was approved for only the phase I period. The goal for this Phase I project was to develop an industrial model that can perform continuous and efficient dewatering of fine coal slurries of the previous flotation process to fine coal cake of {approx}15% water content from 50-70%. The feasibility of this model should be demonstrated experimentally using a lab scale setup. The Phase I project was originally for one year, from May 2005 to May 2006. With DOE approval, the projec… more
Date: December 22, 2006
Creator: Zhang, Wu; Yang, David; Amarnath, Amar; Huq, Iftikhar; O'Brien, Scott & Williams, Jim
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Regulating Intracellular Calcium in Plants: From Molecular Genetics to Physiology

Description: To grow, develop, adapt, and reproduce, plants have evolved mechanisms to regulate the uptake, translocation and sorting of calcium ions into different cells and subcellular compartments. Yet how plants accomplish this remarkable feat is still poorly understood. The spatial and temporal changes in intracellular [Ca2+] during growth and during responses to hormonal and environmental stimuli indicate that Ca2+ influx and efflux transporters are diverse and tightly regulated in plants. The specifi… more
Date: June 22, 2008
Creator: Sze, Heven
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of transport in distribution of radioions and radiolabeled metabolites

Description: The following topics are discussed: route of administration; carrier effects and complexed or ionic tracers; membrane permeability, extracellular and intracellular concentrations; enzyme and hormonal stimulation or depression and the metabolic state; neoplasia and transport; and carrier for radiopharmaceutical binding to membrane or protein sites. Some radioisotopes considered are /sup 99m/Tc, /sup 65/Zn, /sup 62/Zn, /sup 14/C and /sup 111/In. (HLW)
Date: December 22, 1977
Creator: Yano, Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Reverse osmosis performance with solutions containing tri-n-butyl phosphate

Description: Tests were conducted to determine whether the reverse osmosis (RO) units at the F/H Effluent Treatment Facility (ETF) at the Savannah River could be made to process solutions containing tri-n-butyl phosphate (TBP). It was desired to test whether operation at a feed pH other than neutral would improve performance. Test results are discussed in this report and indicate that little improvement in the water flux can be expected at other pH values.
Date: October 22, 1991
Creator: Siler, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Remediating biofouling of reverse osmosis membranes

Description: Several potential additives and the use of influent pH adjustment were examined to remediated the biofouling problem of the ETF reverse osmosis (RO) system. Tests were conducted with simulated RO feed containing salt, metal hydroxides and bacteria. The addition of sodium hexametaphosphate (SHMP), sodium bisulfite, and adjusting the influent pH to 3 were each successful in reducing the RO biofouling. Little or no benefit was found from the use of a biofilm remover (Filmtec Alkaline Cleaner) or t… more
Date: October 22, 1991
Creator: Siler, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Remediating biofouling of reverse osmosis membranes

Description: Several potential additives and the use of influent pH adjustment were examined to remediated the biofouling problem of the ETF reverse osmosis (RO) system. Tests were conducted with simulated RO feed containing salt, metal hydroxides and bacteria. The addition of sodium hexametaphosphate (SHMP), sodium bisulfite, and adjusting the influent pH to 3 were each successful in reducing the RO biofouling. Little or no benefit was found from the use of a biofilm remover (Filmtec Alkaline Cleaner) or t… more
Date: October 22, 1991
Creator: Siler, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

METHOD TO PREVENT SULFUR ACCUMULATION INSIDE MEMBRANE ELECTRODE ASSEMBLY

Description: HyS is conceptually the simplest of the thermochemical cycles and involves only sulfur chemistry. In the HyS Cycle hydrogen gas (H{sub 2}) is produced at the cathode of the electrochemical cell (or electrolyzer). Sulfur dioxide (SO{sub 2}) is oxidized at the anode to form sulfuric acid (H{sub 2}SO{sub 4}) and protons (H{sup +}) as illustrated below. A separate high temperature reaction decomposes the sulfuric acid to water and sulfur dioxide which are recycled to the electrolyzers, and oxygen w… more
Date: June 22, 2009
Creator: Steimke, J.; Steeper, T.; Herman, D.; Colon-Mercado, H. & Elvington, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

FY05 LDRD Final Report Molecular Engineering of Electrodialysis Membranes 03-ERD-060

Description: Using a combination of modeling and experimental work we have developed a new method for purifying water that uses less energy than conventional methods and that can be made selective for removing targeted contaminants. The method uses nanoporous membranes that are permselective for anion or cation transfer. Ion selectivity results from double layer overlap inside the pores such that they dominantly contain ions opposite in charge to the surface charge of the membrane. Membrane charge can be ad… more
Date: February 22, 2006
Creator: Bourcier, W.; O'Brien, K.; Sawvel, A.; Johnson, M.; Bettencourt, K.; Letant, S. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Current status of dense ceramic membranes for hydrogen separation.

Description: We have developed cermet membranes that nongalvanically separate hydrogen from gas mixtures. The highest measured hydrogen flux was 16.2 cm{sup 3} (STP)/min-cm{sup 2} for an ANL-3a membrane at 900 C. For ANL-3 membranes with thickness of 0.04-0.5 mm, permeation rate is limited by the bulk diffusion of hydrogen through the metal phase. The effect of hydrogen partial pressure on permeation rate confirmed this conclusion and suggested that higher permeation rates may be obtained by decreasing the … more
Date: February 22, 2002
Creator: Balachandran, U.; Lee, T. H.; Wang, S.; Zhang, G. & Dorris, S. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Novel Membrane Reactor for Direct Hydrogen Production From Coal Quarterly Report

Description: Gas Technology Institute is developing a novel concept of membrane gasifier for high efficiency, clean and low cost production of hydrogen from coal. The concept incorporates a hydrogen-selective membrane within a gasification reactor for direct extraction of hydrogen from coal synthesis gases. The objective of this project is to determine the technical and economic feasibility of this concept by screening, testing and identifying the potential candidate membranes under high temperature, high p… more
Date: January 22, 2004
Creator: Doong, Shain; Ong, Estela; Atroshenko, Mike; Lau, Francis & Roberts, Mike
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Well-to-wheels analysis of fuel-cell vehicle/fuel systems.

Description: Major automobile companies worldwide are undertaking vigorous research and development efforts aimed at developing fuel-cell vehicles (FCVs). Proton membrane exchange (PEM)-based FCVs require hydrogen (H{sub 2}) as the fuel-cell (FC) fuel. Because production and distribution infrastructure for H{sub 2} off board FCVs as a transportation fuel does not exist yet, researchers are developing FCVs that can use hydrocarbon fuels, such as methanol (MeOH) and gasoline, for onboard production of H{sub 2… more
Date: January 22, 2002
Creator: Wang, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Field Demonstration of a Membrane Process to Separate Nitrogen from Natural Gas

Description: The original proposal described the construction and operation of a 1 MMscfd treatment system to be operated at a Butcher Energy gas field in Ohio. The gas produced at this field contained 17% nitrogen. During pre-commissioning of the project, a series of well tests showed that the amount of gas in the field was significantly smaller than expected and that the nitrogen content of the wells was very high (25 to 30%). After evaluating the revised cost of the project, Butcher Energy decided that t… more
Date: December 22, 2005
Creator: Lokhandwala, Kaaeid
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mixed-conducting dense ceramics for gas separation applications.

Description: Mixed-conducting (electronic and ionic conducting) dense ceramics are used in many applications, including fuel cells, gas separation membranes, batteries, sensors, and electrocatalysis. This paper describes mixed-conducting ceramic membranes that are being developed to selectively remove oxygen and hydrogen from gas streams in a nongalvanic mode of operation (i.e., with no electrodes or external power supply). Ceramic membranes made of Sr-Fe-Co oxide (SFC), which exhibits high combined electro… more
Date: June 22, 1999
Creator: Balachandran, U.; Dorris, S. E.; Dusek, J. T.; Guan, J.; Liu, M.; Ma, B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Electrical Simulation of Diaphragm Feed Pump System

Description: The electical analog study of the diaphragm feed pump system resulted in changes to the system which have improved the over-all operation and reliability of the pumps. Specifically, the study showed that if the release of the high- pressure oil from the pulsator through the valve on the Scott and Williams pump could be made to take place over a longer period of time, pressure oscillations could be substantially reduced. Also, pressure surges could be reduced by placing an accumulator in the pum… more
Date: May 22, 1958
Creator: Pasqua, P. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reverse osmosis performance with solutions containing tri-n-butyl phosphate

Description: Tests were conducted to determine whether the reverse osmosis (RO) units at the F/H Effluent Treatment Facility (ETF) at the Savannah River could be made to process solutions containing tri-n-butyl phosphate (TBP). It was desired to test whether operation at a feed pH other than neutral would improve performance. Test results are discussed in this report and indicate that little improvement in the water flux can be expected at other pH values.
Date: October 22, 1991
Creator: Siler, J.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Silica Membranes for Hydrogen Separation From Coal Gas

Description: The project objectives are (1) to explore new silylation reagents and reaction conditions with the purpose of reducing the thickness and increasing the permeance of silica membranes, (2) to delineate mechanism and kinetics of silica deposition, (3) to measure the permeability of silica layers at different extents of deposition and (4) to mathematically model the relationship of permeability and membrane structure. Study of the literature has suggested the use of certain ultrafast silylation rea… more
Date: December 22, 1992
Creator: Gavalas, G. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Silica Membranes for Hydrogen Separation From Coal Gas. Quarterly Progress Report, September 1, 1992--November 30, 1992

Description: The project objectives are (1) to explore new silylation reagents and reaction conditions with the purpose of reducing the thickness and increasing the permeance of silica membranes, (2) to delineate mechanism and kinetics of silica deposition, (3) to measure the permeability of silica layers at different extents of deposition and (4) to mathematically model the relationship of permeability and membrane structure. Study of the literature has suggested the use of certain ultrafast silylation rea… more
Date: December 22, 1992
Creator: Gavalas, G. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

RECENT ADVANCES IN THE DEVELOPMENT OF THE HYBRID SULFUR PROCESS FOR HYDROGEN PRODUCTION

Description: Thermochemical processes are being developed to provide global-scale quantities of hydrogen. A variant on sulfur-based thermochemical cycles is the Hybrid Sulfur (HyS) Process, which uses a sulfur dioxide depolarized electrolyzer (SDE) to produce the hydrogen. In the HyS Process, sulfur dioxide is oxidized in the presence of water at the electrolyzer anode to produce sulfuric acid and protons. The protons are transported through a cation-exchange membrane electrolyte to the cathode and are redu… more
Date: July 22, 2010
Creator: Hobbs, D.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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Superconducting High Energy Resolution Gamma-ray Spectrometers

Description: We have demonstrated that a bulk absorber coupled to a TES can serve as a good gamma-ray spectrometer. Our measured energy resolution of 70 eV at 60 keV is among the best measurements in this field. We have also shown excellent agreement between the noise predictions and measured noise. Despite this good result, we noted that our detector design has shortcomings with a low count rate and vulnerabilities with the linearity of energy response. We addressed these issues by implementation of an act… more
Date: February 22, 2002
Creator: Chow, Daniel Tun Lai
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Enhanced Practical Photosynthetic CO2 Mitigation

Description: This quarterly report documents significant achievements in the Enhanced Practical Photosynthetic CO{sub 2} Mitigation project during the period from 4/2/2003 through 7/01/2003. As indicated in the list of accomplishments below we have completed some long-term model scale bioreactor tests and are prepared to begin pilot scale bioreactor testing. Specific results and accomplishments for the second quarter of 2003 include: (1) Bioreactor support systems and test facilities: (a) Qualitative long-t… more
Date: July 22, 2003
Creator: Kremer, Gregory; Bayless, David J.; Vis, Morgan; Prudich, Michael; Cooksey, Keith & Muhs, Jeff
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MCF-10A-NeoST: A New Cell System for Studying Cell-ECM and Cell-Cell Interactions in Breast Cancer

Description: There is a continuing need for genetically matched cell systems to model cellular behaviors that are frequently observed in aggressive breast cancers. We report here the isolation and initial characterization of a spontaneously arising variant of MCF-10A cells, NeoST, which provides a new model to study cell adhesion and signal transduction in breast cancer. NeoST cells recapitulate important biological and biochemical features of metastatic breast cancer, including anchorage-independent growth… more
Date: August 22, 2001
Creator: Zantek, N. D.; Walker-Daniels, J.; Stewart, J.; Hansen, R. K.; Robinson, D.; Miao, H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A method to remove Ammonia using a Proton-Conducting Ceramic Membrane

Description: An apparatus and method for decomposing NH{sub 3}. A fluid containing NH{sub 3} is passed in contact with a tubular membrane that is a homogeneous mixture of a ceramic and a first metal, with the ceramic being selected from one or more of a cerate having the formula of M' Ce{sub 1-x} M''O{sub 3-{delta}}, zirconates having the formula M'Zr{sub 1-x} M''3-{delta}, stannates having the formula M'Sn{sub 1-x}M''O{sub 3}-{delta}, where M' is a group IIA metal, M'' is a dopant metal of one or more of C… more
Date: September 22, 1999
Creator: Balachandran, Uthamalingam & Bose, Arun C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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