4,611 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Hydrocarbons"  
prev Results: 2857 - 2880 next
open access

Report on the combustion research contractors' meeting

Description: A total of 46 short papers or abstracts are included, arranged into sessions dealing with general and NSLS status, theory of reactivity and chemical dynamics in combustion, kinetics of combustion reactions, (two sessions), and laser diagnostics for high temperature and combustion systems. (DLC)
Date: October 1, 1979
Creator: Klemm, R.B. & Muckerman, J.T. (eds.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Competing electron-electron/electron-phonon interactions and polyacetylene

Description: Using Lanczos exact diagonalization, we investigate the effects of the competition between the electro-electron and electron-phonon interactions in the context of the 1-D tight-binding Peierls-Hubbard Hamiltonian, studying various structural, optical, and vibrational properties of strongly correlated systems. We use polyacetylene as our experimental guide, and perform a parameter space search to determine the level at which a unique set of parameters can model this prototypical conducting polym… more
Date: April 8, 1991
Creator: Gammel, J.T. (Los Alamos National Lab., NM (USA) Bayreuth Univ. (Germany, F.R.). Physics Inst.); Campbell, D.K. (Los Alamos National Lab., NM (USA)) & Loh, E.Y. Jr. (Thinking Machines Corp., Cambridge, MA (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Molecular structure studies by 3D imaging of fast ion beams

Description: The use of the Coulomb-explosion technique combined with a radically new multi-particle detector, extremely thin film targets, and low-excitation ion source has enabled, for the first time, direct measurements of the complete stereochemistry of complex polyatomic molecular ions. We outline the methods used and present results for protonated acetylene (C/sub 2/H/sub 3//sup +/) and the methane cation (CH/sub 4//sup +/) as examples. We demonstrate the techniques by which these methods can be gener… more
Date: January 1, 1986
Creator: Kanter, E. P.; Vager, Z.; Both, G.; Cooney, P. J.; Faibis, A.; Koenig, W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Permeability Changes in Coal Resulting From Gas Desorption

Description: The goal of this task is to accurately measure the elongation and shrinkage exhibited by coal as it sorbs and desorbs methane gas at elevated pressure. Our research group has discussed several possible methods to measure this strain, including: optical microscopy, laser interferometry, conventional strain gauges, and LVDT strain gauges. There are advantages and disadvantages of each method. We had planned to use optical microscopy but, on further investigation, this approach will be less satisf… more
Date: January 1, 1989
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

ARTI Refrigerant Database

Description: The database provides bibliographic citations and abstracts for publications that may be useful in research and design of air- conditioning and refrigeration equipment. The database identifies sources of specific information on R-32, R-123, R-124, R-125, R-134, R-134a, R-141b, R-142b, R-143a, R-152a, R-245ca, R-290 (propane), R- 717 (ammonia), ethers, and others as well as azeotropic and zeotropic and zeotropic blends of these fluids. It addresses lubricants including alkylbenzene, polyalkylene… more
Date: November 9, 1992
Creator: Calm, J.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application for continuation of mixed ionic and electronic conductivity in polymers

Description: The aim in this portion of the research is to prepare new electroactive films with high ion mobility, and to characterize the transport properties of these materials. The classic conducting polymers, polyacetylene, polythiophene, and polypyrrole have dense structures that prevent rapid redox switching because of the low diffusivity of ions. The objective is to modify the last two polymers with pendant polyethers, which should greatly improve ion transport.
Date: January 1, 1990
Creator: Shiver, D.F. & Ratner, M.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Organometallic Chemistry of Metal Surfaces

Description: The organometallic chemistry of metal surfaces is defined as a function of surface crystallography and of surface composition for a set of cyclic hydrocarbons that include benzene, toluene, cyclohexadienes, cyclohexene, cyclohexane, cyclooctatetraene, cyclooctadienes, cyclooctadiene, cycloheptatriene and cyclobutane. 12 figures.
Date: June 1981
Creator: Muetterties, E. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Strong ignition limits for methane-hydrogen mixtures

Description: A study of the auto-ignition behind relected shock in eleven mixtures of CH/sub 4/-O/sub 2/, H/sub 2/-O/sub 2/, and CH/sub 4/-H/sub 2/-O/sub 2/ covering a temperature range of 900 to 2400/sup 0/K and pressure range of 1 to 3 atm was carried out. The induction times were correlated with an equation of the Arrhenius form that was found to be quite satisfactory. All the strong ignition limits determined could be expressed in terms of a constant value expressed in terms of the partial derivative of… more
Date: January 1, 1981
Creator: Cheng, R.K. & Oppenheim, A.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Data Summary of Municipal Solid Waste Management Alternatives, Volume 10: Appendix H--Anaerobic Digestion of MSW

Description: While municipal solid waste (MSW) thermoconversion and recycling technologies have been described in Appendices A through E, this appendix addresses the role of bioconversion technologies in handling the organic fraction in MSW and sewage sludge. Much of the organic matter in MSW, consisting mainly of paper, food waste, and yard waste, has potential for conversion, along with sewage sludge, through biochemical processes to methane and carbon dioxide providing a measurable, renewable energy reso… more
Date: October 1992
Creator: SRI International
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical conversion of benzo(e)pyrene by aqueous serum albumin to pyrene-like product: fluorescence method

Description: The interaction of benzo(e)pyrene, an atmospheric pollutant formed during the burning of organic materials, and bovine serum albumin (BSA) was studied to determine a pyrene-type metabolite is formed. (ACR)
Date: January 1, 1980
Creator: Srinivasan, B.N. & Fujimori, E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Catalysis by platinum single crystal surfaces: low pressure hydrocarbon reactions and the effects of introducing strongly bound oxygen at the surface

Description: The dehydrogenation of cyclohexene and cyclohexane, and the hydrogenation of cyclohexene were studied on the clean and preoxidized surfaces of three platinum single crystals: a Pt(111), a stepped Pt(S) - (6(111) x (100)) and a kinked Pt(S) - (7(111) x (310)). The choice of reaction conditions is discussed with respect to detection limits and the variation of the catalyst reactivity with reagent pressures and catalyst temperature; the reactions were carried out using flow conditions at low press… more
Date: July 1, 1978
Creator: Smith, C.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Identification of geopressured occurrences outside of the Gulf Coast

Description: Methane dissolved in saline formation waters under abnormally high pressure (geopressure) is one of several unconventional gas sources that is under intensive investigation by the Department of Energy. The most well-known and studied region of geopressures in the US is the Gulf Coast geosyncline. Recent studies, however, indicate that this phenomenon is displayed in many other sedimentary basins encompassing lithologies and sedimentary environments unlike those of the Gulf Coast. These include … more
Date: January 1, 1981
Creator: Strongin, O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Degradation of mix hydrocarbons by immobilized cells of mix culture using a trickle fluidized bed reactor

Description: The microorganisms, capable of degrading mix hydrocarbons were isolated from the soil samples collected from the hydrocarbon contaminated sites. The mix cultures were immobilized in calcium alginate solution in the form of beads. A trickle fluidized bed air-uplift-type reactor designed to study the degradation of mix hydrocarbons was filled with 0.85% normal saline containing the immobilized cells of mix culture. The immobilized beads were aerated with CO[sub 2]-free air at 200 ml/min. The degr… more
Date: January 1, 1993
Creator: Chapatwala, K.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

F-Area Acid/Caustic Basin groundwater monitoring report. Third quarter 1993

Description: During third quarter 1993, samples from the six FAC monitoring wells at the F-Area Acid/Caustic Basin were collected and analyzed for indicator parameters, groundwater quality parameters, parameters indicating suitability as drinking water, and other constituents. One of the FAC piezometers was scheduled for these analyses but was dry. Analytical results that exceeded the final Primary Drinking Water Standards (PDWS) or the Savannah River Site (SRS) flagging criteria or turbidity standard durin… more
Date: December 1, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Argonne National Laboratory-East site environmental report for calendar year 1991

Description: This report discusses the results of the environmental protection program at Argonne National Laboratory-East (ANL) for 1991. To evaluate the effects of ANL operations on the environment, samples of environmental media collected on the site, at the site boundary, and off the ANL site were analyzed and compared to applicable guidelines and standards. A variety of radionuclides was measured in air, surface water, groundwater, soil, grass, and bottom sediment samples. Chemical constituents in surf… more
Date: May 1, 1992
Creator: Golchert, N. W.; Duffy, T. L. & Moos, L. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Operations Support of Phase 2 Integrated Demonstration In Situ Bioremediation. Volume 4, Final report: Averaged data in tabular form, Disks 3,4; Averaged data in graphical form, Disks 1,2,3,4

Description: This report contains experimental data collected during the demonstration of in situ bioremediation at the Savannah River Site. This project was designed to demonstrate in situ bioremediation of ground water and sediment contaminated with chlorinated solvents. Indigenous microorganisms were stimulated to degrade trichloroethylene, tetrachloroethylene, and their daughter products in situ by addition of nutrients to the contaminated aquifer and adjacent vadose zone. The principle carbon/energy so… more
Date: September 1, 1993
Creator: Hazen, T. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterization of air toxics from a laboratory coal-fired combustor and utility scale power plants. Quarterly progress report No. 6, January--March 1993

Description: Laboratory combustor studies were conducted at Battelle in the fall of 1992 to evaluate sampling methods and analysis techniques for air toxics generated by buming pulverized coal. These experiments were described in the fifth quarterly progress report. In this report results from additional analyses of samples are reported. Results are shown in Tables 1--8 for analysis of nitro-polycyclic aromatic hydrocarbons (nitro-PAH), oxygenated PAH (oxy-PAH), hydroxy-nitro-aromatic compounds (OH-NO2-AR/P… more
Date: April 1, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of improved iron Fischer-Tropsch catalysts. Quarterly technical progress report, 1 January 1992--31 March 1992

Description: Three tests (two fixed bed and one stirred tank slurry reactor) were completed during the reporting period. Also, the work on catalyst characterization by different techniques (atomic absorption, BET surface area and pore size distribution and x-ray powder diffraction).The performance of a precipitated iron catalyst with nominal composition lOOFe/0.3Cu/0.8K has been evaluated in two fixed bed reactor tests designated FB-0142 and FB-0352 following pretreatment with syngas (H{sub 2}/CO=0.67) at 2… more
Date: April 24, 1992
Creator: Bukur, D. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Heat transfer characteristics of a three-phase volume boiling direct contact heat exchanger

Description: The advantages of direct contact heat transfer over heat transfer utilizing conventional metallic heat exchangers are listed. The performance characteristics of a three-phase direct contact heat exchanger in near counterflow operation were evaluated using water as the continuous phase fluid and refrigerant 113 as the dispersed phase fluid. Conclusions are drawn from the results having to do with refrigerant injection technique, vessel operating height, mass flow rate of refrigerant, water inlet… more
Date: March 1, 1976
Creator: Blair, C. K.; Boehm, R. F. & Jacobs, H. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Separation of polar shale oil compounds using high-speed liquid chromatography. [Compounds known to exist in shale oil]

Description: Methods for separation of potentially toxic compounds from shale oil and its waste products by high-speed liquid chromatography (HSLC) are discussed. The following classes of compounds were selected for study: aromatic and polynuclear aromatic hydrocarbons, thiophenes, and indoles. No attempt was made to identify or quantitate compounds in shale oil, but it was demonstrated that HSLC can be a rapid and sensitive method for the separation of polar compounds from classes recognized to be present … more
Date: November 1, 1976
Creator: Riley, R. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The effect of chemical reactivity on source reconciliation modeling of nonmethane hydrocarbons

Description: Source fingerprints for 18 nonmethane hydrocarbons (NMHCS) containing 2-8 carbon atoms are currently used to apportion NMHC sources by chemical mass balance (CMB) modeling approaches. The source profiles must be stable in the troposphere to obtain accurate CMB model predictions. The NMHC source apportionment compounds are susceptible to gas phase oxidation in the atmosphere by hydroxyl radical (OH). Expected tropospheric lifetimes for peak concentrations of OH in typical urban air range from an… more
Date: April 1, 1994
Creator: Doskey, P. V. & Gaffney, J. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Effect of Chemical Additives on the Synthesis of Ethanol

Description: The objective of this research is to elucidate the role of various chemical additives on ethanol synthesis over Rh- and Ni-based catalysts. Chemical additives used for this study will include S, P, Ag, Cu, Mn, and Na which have different electronegativeities. The effect of additives on the surface state of the catalysts, heat of adsorption of reactant molecules, reaction intermediates, reaction pathways, reaction kinetics, and product distributions is/will be investigated by a series of experim… more
Date: August 30, 1989
Creator: Chuang, S. S. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Major Oil Plays in Utah and Vicinity

Description: Utah oil fields have produced over 1.2 billion barrels (191 million m{sup 3}). However, the 13.7 million barrels (2.2 million m{sup 3}) of production in 2002 was the lowest level in over 40 years and continued the steady decline that began in the mid-1980s. The Utah Geological Survey believes this trend can be reversed by providing play portfolios for the major oil-producing provinces (Paradox Basin, Uinta Basin, and thrust belt) in Utah and adjacent areas in Colorado and Wyoming. Oil plays are… more
Date: December 31, 2003
Creator: Chidsey, Thomas C.; Morgan, Craig D.; McClure, Kevin; Sprinkel, Douglas A.; Bon, Roger L. & Doelling, Hellmut H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solitons in synthetic and biological polymers

Description: Solid state and statistical physics applications of soliton mathematics continue to expand rapidly. The present report describes connections between solid state (e.g. synthetic polymer) and biophysics, with strong nonlinearity playing the unifying role. Striking parallels examined include: analytical (as in the case of self-trapping mechanisms); numerical techniques; experimental implications, applications, and techniques. Conventional solid state probes are at last being devoted to biopolymers… more
Date: January 1, 1983
Creator: Bishop, A. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen