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Modulated molecular beam mass spectrometric studies of the high temperature pyrolysis of hydrocarbons

Description: The pyrolysis products of benzene and toluene were studied as functions of temperature (up to 2000/sup 0/C) and pressure. Above 1400/sup 0/C, most of the larger species are unstable; above 1700/sup 0/C, no species heavier than C/sub 6/H/sub 6/ are observed at any pressure. Above 1500/sup 0/C and at higher pressures, the products are dominated by species containing even numbers of carbon atoms (C/sub 2/ to C/sub 12/). While polyacetylenes up to C/sub 8/H/sub 2/ were observed, they are present in… more
Date: July 1, 1979
Creator: Smith, R. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Catalyst and Feedstock Effects in the Thermochemical Conversion of Biomass to Liquid Transportation Fuels

Description: The thermochemical conversion of biomass feedstocks to liquid transportation fuels can be accomplished by three processes, namely gasification, high-pressure liquefaction, and pyrolysis. In this study, the pyrolysis option is selected which is followed by the catalytic upgrading of pyrolysis vapors to aromatic and olefinic hydrocarbons (PYROCAT process). The aromatics constitute a high-octane gasoline blend, while the olefins can be utilized as feedstocks for various chemicals. The PYROCAT proc… more
Date: May 1992
Creator: Rejai, B.; Agblevor, F. A.; Evans, R. J. & Wang, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Rankine bottoming cycle safety analysis. Final report

Description: Vector Engineering Inc. conducted a safety and hazards analysis of three Rankine Bottoming Cycle Systems in public utility applications: a Thermo Electron system using Fluorinal-85 (a mixture of 85 mole % trifluoroethanol and 15 mole % water) as the working fluid; a Sundstrand system using toluene as the working fluid; and a Mechanical Technology system using steam and Freon-II as the working fluids. The properties of the working fluids considered are flammability, toxicity, and degradation, an… more
Date: February 1, 1980
Creator: Lewandowski, G.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of chemical and gamma irradiation environments on the mechanical properties of high-density polyethylene (HDPE)

Description: High-density polyethylene (HDPE) is currently being used as a high-integrity container material for low-level wastes. Potential failure/degration modes must be determined for realistic environmental conditions. These include consideration of mechanical stress, gaseous/liquid environments within and external to the container, and the gamma radiation field. A combination of simple inexpensive tests (stressed U-bend samples) and more sophisticated longer-term uniaxial creep tests are being used to… more
Date: January 1, 1988
Creator: Soo, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Treatability study for WAG 6 (SWSA 6) trench water

Description: The Environmental Restoration Program at Oak Ridge National Laboratory (ORNL) is examining methods for remediation and final closure of Waste Area Grouping 6 (WAG 6) under a Resource Conservation and Recovery Act (RCRA) closure plan. WAG 6 consists primarily of Solid Waste Storage Area 6 (SWSA 6), where solid low- level radioactive waste (and some hazardous waste) was buried from 1968 to 1985 in shallow trenches. To support the feasibility study that is being prepared for closure of WAG 6, lab-… more
Date: August 1, 1991
Creator: Taylor, P.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of an integrated heat pipe-thermal storage system for a solar receiver

Description: The Organic Rankine Cycle (ORC) Solar Dynamic Power System (SDPS) is one of the candidates for Space Station prime power application. In the low earth orbit of the Space Station approximately 34 minutes of the 94-minute orbital period is spent in eclipse with no solar energy input to the power system. For this period the SDPS will use thermal energy storage (TES) material to provide a constant power output. Sundstrand Corporation is developing a ORC-SDPS candidate for the Space Station that use… more
Date: January 1, 1987
Creator: Keddy, E.S.; Sena, J.T.; Merrigan, M.A.; Heidenreich, G. & Johnson, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Organic Rankine-cycle power systems working fluids study: Topical report No. 2, Toluene

Description: The US Department of Energy initiated an investigation at Argonne National Laboratory in 1982 to experimentally determine the thermal stability limits and degradation rates of toluene as a function of maximum cycle temperature. Following the design and construction of a dynamic test loop capable of closely simulating the thermodynamic conditions of typical organic Rankine-cycle (ORC) power systems, four test runs, totaling about 3900 h of test time and covering a temperature range of 600-677(de… more
Date: February 1, 1987
Creator: Cole, R.L.; Demirgian, J.C. & Allen, J.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dependence of liquefaction behavior on coal characteristics. Part V. Penetration of solvent vapor into coal particles. Final technical report, March 1981-February 1984

Description: The investigation of the sorption of solvent vapor into high volatile bituminous coal at temperatures up to 175/sup 0/C indicates that the solvent weight gain involves a complex coupling of several phenomena including adsorption, sorption into the coal matrix, capillary condensation and extraction into the condensed vapor phase. It appears that the sorption in untreated coal is dominated by capillary condensation induced by solvent extraction. As a result, an equilibrium state is not attainable… more
Date: April 1, 1984
Creator: Hsieh, S. T. & Duda, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Synthesis of block copolymers of methyl siloxane, phenyl siloxane, vinyl siloxane, etc

Description: Synthesis of homo poly(dimethylsiloxane) PDMS, homo poly(diphenylsiloxane PDPS, and di- and tri- block copolymers of PDMS and PDPS have been carried out by anionic living polymerization, using the following reagents: hexamethylcyclotrisiloxane, HMTS and hexaphenylcyclotrisiloxane, HPTS (monomers), n-BuLi and dilithium diphenyldisilanolate, DLS (initiators), DMSO and THF (promoters) and Toluene (solvent). Lithium based catalysts are used in order to minimize siloxane rearrangement (equilibration… more
Date: June 30, 1979
Creator: Ibemesi, J.A. & Meier, D.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Kinetic Modeling study on the Oxidation of Primary Reference Fuel?Toluene Mixtures Including Cross Reactions between Aromatics and Aliphatics

Description: A detailed chemical kinetic model for the mixtures of Primary Reference Fuel (PRF: n-heptane and iso-octane) and toluene has been proposed. This model is divided into three parts; a PRF mechanism [T. Ogura et al., Energy & Fuels 21 (2007) 3233-3239], toluene sub-mechanism and cross reactions between PRF and toluene. Toluene sub-mechanism includes the low temperature kinetics relevant to engine conditions. A chemical kinetic mechanism proposed by Pitz et al. [Proc. the 2nd Joint Meeting of the U… more
Date: January 9, 2008
Creator: Sakai, Y.; Miyoshi, A.; Koshi, M. & Pitz, W. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Improved instrument for the measurement of the thermal conductivity of non-electrolyte liquids. Progress report No. 1, May 1, 1979-January 15, 1980

Description: An improved instrument for the measurement of the thermal conductivity of non-electrolyte liquids was designed and constructed. Eventually the apparatus will be tested and the thermal conductivity of two coal-derived synthetic oils will be measured. (FS)
Date: 1980~
Creator: Sloan, E.D. & Graboski, M.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Synthesis, chemistry, and catalytic activity of complexes of lanthanide and actinide metals in unusual oxidation states and coordination environments. Progress report, February 1, 1977--January 31, 1978

Description: Research devoted to synthesis of new classes of lanthanide and actinide complexes is reported. Co-condensation of lanthanide metals with 1,3-butadiene (1,3-C/sub 4/H/sub 6/) or 2,3-dimethyl-1,3-butadiene (2,3-(CH/sub 3/)/sub 2/-1,3-C/sub 4/H/sub 4/) produces three types of organolanthanide complexes differentiated by their solubility in pentane, toluene and tetrahydrofuran (THF). The THF soluble species are formed in highest yield and have been most completely characterized. Elemental analysis … more
Date: October 1, 1977
Creator: Evans, W. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Exploratory study of coal conversion chemistry. Quarterly report No. 2, August 19, 1981-November 18, 1981. [Hydroxydipnenylmethanes, triphenylmethane, diphenylether]

Description: This report describes work accomplished under two tasks: Task A, mechanisms of donor-solvent coal liquefaction, and Task B, CO/H/sub 2/O conversion systems. Under Task A, we describe additional evidence relating to the question of the mechanism of the iron oxide catalyzed cleavage of hydroxydiphenylmethanes. o-Hydroxydiphenylmethane is relatively more sensitive to catalysis by Fe/sub 3/O/sub 4/, a possible one electron oxidant, and triphenylmethane is relatively more sensitive to catalyzed clea… more
Date: January 29, 1982
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Organic Photochemical Storage of Solar Energy. Progress Report, February 1, 1979-January 31, 1980

Description: Study of valence isomerization of organic compounds has focused on two mechanisms of photosensitization involving either electron donor-acceptor interaction or energy transfer. The quenching of fluorescent sensitizers by isomerizable substrates results in the formation of excited complexes. These sensitizer-substrate pairs are highly polarized, leading to changes in bond order for the substrates. For several substrates such as quadricyclene, hexamethyldewarbenzene, and a nonbornadiene derivativ… more
Date: February 1, 1980
Creator: Jones, G., II
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Integrated heat pipe-thermal storage design for a solar receiver. [Constant power source with heat from sun or from storage]

Description: Light-weight heat pipe wall elements that incorporate a thermal storage subassembly within the vapor space are being developed as part of the Organic Rankine Cycle Solar Dynamic Power Systems (ORC-SDPS) receiver for the space station application. The operating temperature of he heat pipe elements is in the 770 to 810/sup 0/K range with a design power throughput of 4.8 kW per pipe. The total heat pipe length is 1.9 M. The Rankine cycle boiler heat transfer surfaces are positioned within the heat… more
Date: January 1, 1986
Creator: Keddy, E.S.; Sena, J.T.; Woloshun, K.; Merrigan, M.A. & Heidenreich, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analysis of organic compounds in water by direct adsorption and thermal desorption. [Dissertation]

Description: An instrument was designed and constructed that makes it possible to thermally desorb organic compounds from wet adsorption traps to a gas chromatograph in an efficient and reproducible manner. Based on this device, a method of analyzing organics in water was developed that is rapid, sensitive, and of broader scope than previously published methods. The system was applied to the analysis of compounds with a wide range of volatilities. Temperature and flow parameters were investigated and specif… more
Date: March 1, 1980
Creator: Ryan, J.P. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Wireless Luminescence Integrated Sensors (WLIS)

Description: The goal of this project was the development of a family of wireless, single-chip, luminescence-sensing devices to solve a number of difficult distributed measurement problems in areas ranging from environmental monitoring and assessment to high-throughput screening of combinatorial chemistry libraries. These wireless luminescence integrated sensors (WLIS) consist of a microluminometer, wireless data transmitter, and RF power input circuit all realized in a standard integrated circuit (IC) proc… more
Date: November 10, 2003
Creator: Simpson, M. L. & Sayler, G. S. (Univ. Tennessee)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary Evaluation of a Portable Handheld Combined Gamma and Neutron Directional Isotopic Identifying Detector

Description: Purpose: To simulate the performance of a portable dual gamma and neutron identification detector array with dual directional detection capability for preliminary algorithm evaluation. Experimental procedures: Monte Carlo N-Particle (MCNP) analysis on a compact array of borated polyvinyl toluene light pipes and photomultiplier tubes, standard spectral histogramming, and directional detection capability simulations. Results: Results demonstrate that the detector system is fully capable of correc… more
Date: February 14, 2008
Creator: Hayes, Robert
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Enzyme Activity Probe and Geochemical Assessment for Potential Aerobic Cometabolism of Trichloroethene in Groundwater of the Northwest Plume, Paducah Gaseous Diffusion Plant, Kentucky

Description: The overarching objective of the Paducah Gaseous Diffusion Plant (PGDP) enzyme activity probe (EAP) effort is to determine if aerobic cometabolism is contributing to the attenuation of trichloroethene (TCE) and other chlorinated solvents in the contaminated groundwater beneath PGDP. The site-specific objective for the EAP assessment is to identify if key metabolic pathways are present and expressed in the microbial community--namely the pathways that are responsible for degradation of methane a… more
Date: June 27, 2008
Creator: Looney, B.; M. Hope Lee, M. & S. K. Hampson, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of a Polyvinyl Toluene Neutron Counter Array

Description: The purpose of this article is to simulate the performance of a neutron detector array for empirical configuration optimization and preliminary algorithm evaluation. Utilizing a compact array of borated Polyvinyl Toluene light pipes and Photomultiplier Tubes, pulse shape analysis, standard spectral histogramming, and multiplicity counting can enable neutron measurements for multiple applications. Results demonstrate that analysis with Monte Carlo N-Particle (MCNP) can be used to obtain a better… more
Date: March 1, 2008
Creator: Hayes, Robert
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Reactions of the toluene-insoluble, pyridine-soluble fraction of Illinois No. 6 coal

Description: Illinois No. 6 coal was extracted with pyridine at 100/sup 0/ and the toluene-insoluble, pyridine-soluble (TIPS) fraction of the extract was used as a model for the 84% of insoluble coal. Various TIPS fractions had number-average molecular weights (anti M/sub n/) in pyridine of 980 to 1380 but were insoluble or only partly soluble in most other solvents. Elemental and /sup 1/H and /sup 13/C NMR analyses indicate an H/C ratio of only 1.3 in the aliphatic portions of the TIPS molecules. The TIPS … more
Date: January 1, 1979
Creator: Mayo, F. R.; Buchanan, D. H. & Pavelka, L. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Adsorption characteristics of PCBs to resins, whole cells, cell and tissue components, and biomolecules

Description: Polychlorinated biphenyls (PCBs) have been designated hazardous chemicals by the US Environmental Protection Agency (EPA). Although PCBs and PCB-containing oils have not been in use since 1977, they persist in the environment. They are known to be absorbed by various aquatic organisms, birds, and mammals. The nature of these affinities is not known. In this study, the Institute of Gas Technology (IGT) compared the adsorption phenomenon of PCBs on commercial resins, whole bacterial cells, cell a… more
Date: January 1, 1990
Creator: Kelley, R. L.; Conrad, J. & Akin, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Environmental control technology for the flash hydropyrolysis of coal. Progress report No. 3, April 1-December 31, 1978

Description: Based on experimental results and analytical studies, preliminary environmental and economic assessments of a conceptual, industrial scale FHP-Refinery Complex have been made. Three cases were considered, one for the production of pipeline gas, the second for the production of liquid hydrocarbons such as motor gasoline and LPG, and the third for the production of both liquid and gaseous products. Solid, liquid and gaseous effluents for each case have been evaluated, and required effluent treatm… more
Date: February 1, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aromatic hydrocarbons associated with brines from geopressured wells

Description: The measurement of basic physical chemical properties of the brine components produced in the US DOE geopressured wells it necessary to provide the fundamental data necessary for an understanding of the mechanisms by which constituents of petroleum migrate and are partitioned into different phases in various geologic strata. The cryocondensate materials, which we sample, are present in the geopressured brines of all the wells observed to date. These materials are a complex mixture of aromatic c… more
Date: January 1, 1989
Creator: Keeley, D. F. & Meriwether, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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