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in subjects: "Gases"

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Porous graphite air-bearing components as applied to machine tools

No Description Available.

Date: January 1, 1974

Creator: Rasnick, W. H.; Arehart, T. A.; Littleton, D. E. & Steger, P. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The development of precipitated iron catalysts with improved stability

The objective of this program is to identify the chemical principles governing the deactivation of precipitated iron catalysts during Fischer-Tropsch synthesis and to use these chemical principles in the design of catalysts suitable for slurry reactors. The performance targets are 88% CO+H{sub 2} conversion with less than 1% deactivation/day for 1 month and a methane and ethane selectivity of no more than 7% (based on hydrocarbons and oxygenates only) at a space velocity of at least 2 normal li… more

Date: May 6, 1992

Creator: Abrevaya, H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Alkali sorber (RABSAM), September 1, 1990--August 30, 1991

The objective of this work is to develop a regenerable activated-bauxite sorber alkali monitor that requires no high-temperature/high-pressure sampling line for the reliable in situ measurement of alkali-vapor concentration in the exhaust from the pressurized fluidized-bed combustion of coal. 11 refs., 2 figs., 1 tab.

Date: January 1, 1991

Creator: Lee, S. H. D. & Swift, M. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Alignment and orientation in ion/endash/atom collisions

Recent progress in the theoretical study of alignment and orientation in atom-atom and ion-atom collisions at intermediate energies is reviewed. Recent systematic studies of the alignment and orientation of electronic charge cloud distributions of excited states resulting from such collisions clearly have provided more detailed information about the underlying collision dynamics. However, since accurate determination of these parameters is quite difficult, both theoretically and experimentally,… more

Date: January 1, 1987

Creator: Kimura, M. & Lane, N.F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Stress corrosion cracking of uranium--niobium alloys

The stress corrosion cracking behavior of U-2/sup 1///sub 4/, 4/sup 1///sub 2/, 6 and 8 wt % Nb alloys was evaluated in laboratory air and in aqueous Cl/sup -/ solutions. Thresholds for crack propagation were obtained in these environments. The data showed that Cl/sup -/ solutions are more deleterious than air environments. Tests were also conducted in pure gases to identify the species in the air responsible for cracking. These data showed the primary stress corrodent is water vapor for the mo… more

Date: March 1, 1978

Creator: Magnani, N.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

First order study for an iron core OH system for TNS

A simple comparison has been made between an air core and an iron core ohmic heating system for a particular device, and it was shown that the peak power requirements can be substantially reduced by the use of an iron core to power levels handled by industry today. It was also shown that for an ohmic heating system initiated plasma that the cost of the iron core ohmic heating power system (iron core, dual rectifier, and DC switch) is less than the cost for a subset of the power system for an ai… more

Date: January 1, 1977

Creator: Ballou, J. K. & Schultz, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Assessment of the risk of transporting liquid chlorine by rail

This report presents the risk of shipping liquid chlorine by rail. While chlorine is not an energy material, there are several benefits to studying chlorine transportation risks. First, chlorine, like energy materials, is widely used as a feedstock to industry. Second, it is the major purification agent in municipal water treatment systems and therefore, provides direct benefits to the public. Finally, other risk assessments have been completed for liquid chlorine shipments in the US and Europe… more

Date: March 1, 1980

Creator: Andrews, W.B.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Final Report of Modeling of CWM Droplet Combustion

The objective of the present study was to develop a one-dimensional, unsteady state model for coal-water mixture droplet combustion, and to compare the characteristic times for the various processes, such as water vaporization, devolatilization and char oxidation with available experimental data. A water film surrounding a spherical coal particle is considered to undergo vaporization by heat transfer from the hot air. After the water vaporization is complete, devolatilization begins. This proce… more

Date: October 1, 1983

Creator: Pandalai, Krish; Aggarwal, Suresh & Sirignano, William

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Diffusion of Slow Electrons in Gases

The properties of electrons in a gas and an external electric field, e.g., agitation velocity, free path, energy lost per collision, and collision cross sections, were determined for electrons of energy less than 2 ev in a large number of gases. The computations were made from previously measured values for Townsend's energy factor or the ratio of electron agitation energy to molecule thermal energy. Results are presented for hydrogen, nitrogen, carbon dioxide, methane, ethylene, cyclopropane, … more

Date: October 24, 1961

Creator: Forester, D. W. & Cochran, L. W.

Item Type: Thesis or Dissertation

Partner: UNT Libraries Government Documents Department

open access

Biological Production of Ethanol From Coal

The fermentation pH has been observed to be the key parameter affecting the ratio of ethanol to acetate produced by Clostridium ljungdahlii. The effects of controlled pH on cell growth and product formation by C. ljungdahlii were measured. It was found that cell concentration and acetate concentration increased with pH, while the ethanol concentration was highest at the lower pH. The molar product ratio of ethanol to acetate was 0.74 at pH 4.0, 0.39 at pH 4.5 and 0.12 at pH 5.0. Future experime… more

Date: January 1, 1990

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Measurement of energy loss in the region of relativistic rise for particle identification

The following boundary conditions are desirable for particle detectors providing momentum and mass measurement in a magnetic field. A multilayer drift chamber of the socalled ''bicycle'' type with a radius of 1.5 m is considered. The useful track length will be l/sub min/ = 1.3 m for a straight track at 90/sup 0/ to the beam axis. Two examples for possible subdivisions of this volume are chosen: (1) number of layers, n = 200 and thickness/layer, x = 6.5 mm; and (2) n = 56 and x = 23 mm. An anal… more

Date: January 1, 1977

Creator: Fischer, J.; Okuno, H. & Walenta, A.H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Advances in the Helium-Jet Coupled on-Line Mass Separator RAMA. [Recoil Atom Mass Analyzer]

General improvements to the on-line mass separator RAMA (Recoil Atom Mass Analyzer) have yielded a greater reliability and efficiency for some elements. A new utilitarian helium-jet chamber has been installed to facilitate quick target and degrader foil changes in addition to a new ion source holder. A higher efficiency hollow-cathode, cathode-extraction ion source, for lower melting point elements (< 1200/sup 0/C) has also been designed. Tests with the beta-delayed proton emitter /sup 37/Ca… more

Date: January 1, 1980

Creator: Moltz, D. M.; Aysto, J.; Cable, M. D.; Parry, R. F.; Haustein, P. E.; Wouters, J. M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Chemical Engineering Division. Coal technology semiannual report, January--June 1975. [Coal gasification; catalytic activity of coal ash]

No Description Available.

Date: July 1, 1975

Creator: Fischer, J.; Che, S.; Lo, R.; Nandi, S.; Young, J. & Jonke, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Enhanced durability and reactivity for zinc ferrite desulfurization sorbent

AMAX Research Development Center (AMAX R D) has been investigating methods for enhancing the reactivity and durability of the zinc ferrite desulfurization sorbent. Zinc ferrite sorbents are intended for use in desulfurization of hot coal gas in integrated gasification combined cycle (IGCC) or molten carbonate fuel cell (MCFC) applications. For the present program, the reactivity of the sorbent may be defined as its sulfur sorption capacity at the breakthrough point and at saturation in a bench-… more

Date: November 14, 1988

Creator: Jha, Mahesh C. & Berggren, Mark H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Biological Production of Ethanol From Coal

Research is continuing in an attempt to increase both the ethanol concentration and product ratio using C. ljungdahlii. The purpose of this report is to present data utilizing a medium prepared especially for C. ljungdahlii. Medium development studies are presented, as well as reactor studies with the new medium in batch reactors. CSTRs and CSTRs with cell recycle. The use of this new medium has resulted in significant improvements in cell concentration, ethanol concentration and product ratio.

Date: January 1, 1992

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Coal Technology Program. Progress report for November 1977

A block of Pittsburgh seam bituminous coal and a block of Wyodak subbituminous coal were pyrolyzed under reducing gas in support of in situ gasification. Information from previously completed block pyrolysis of bituminous coal under an argon atmosphere show that differences in evolved gas result from differences in heating rates. Compared to block pyrolysis at 0.3 C/sup 0//min, block pyrolysis at 3 C/sup 0//min produces less gas but gas with a higher heating value, yielding a higher overall pyr… more

Date: January 1, 1978

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Modeling studies on the precipitation of Kr after implantation into metals

A rate-theory approach is applied to interpreting observations on the precipitation of Kr injected into Ni at temperatures between 25 and 560/degree/C. At temperatures of 400/degree/C or higher, the implanted Kr precipitates evolve into a bi-modal size distribution containing small solid precipitates and an additional population of larger, faceted bubbles. The calculations explore the dependence of the observed bi-modal distribution on the maximum size of the solid Kr precipitates and the effec… more

Date: February 1, 1988

Creator: Rest, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Catalytic steam gasification of bagasse for the production of methanol

Pacific Northwest Laboratory (PNL) tested the catalytic gasification of bagasse for the production of methanol synthesis gas. The process uses steam, indirect heat, and a catalyst to produce synthesis gas in one step in fluidized bed gasifier. Both laboratory and process development scale (nominal 1 ton/day) gasifiers were used to test two different catalyst systems: (1) supported nickel catalysts and (2) alkali carbonates doped on the bagasse. This paper presents the results of laboratory and … more

Date: December 1, 1983

Creator: Baker, E.G. & Brown, M.D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Enhancing the use of coals by gas reburning-sorbent injection

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 three coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices; tangential, wall, 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 tech… more

Date: December 22, 1988

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Efficiencies of gas neutralizers for multi-MeV beams of light negative ions

Measurements are reported of the neutral and charged particle fractions produced by running beams of Li/sup -/, C/sup -/, O/sup -/, and Si/sup -/ at energies up to 7 MeV through gas cells of N/sub 2/, Ar, or CO/sub 2/. We discuss the implications of these measurements for the design of neutralizers to produce high energy light atom beams for heating or current drive in tokamaks.

Date: November 1, 1981

Creator: Grisham, L. R.; Post, D. E.; Johnson, B. M.; Jones, K. W.; Barette, J.; Kruse, T. H. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Report of the Working Group on Media Accelerators

A summary is given of the activities of those in the Media Accelerator Group. Attention was focused on the Inverse Cherenkov Accelerator, the Laser Focus Accelerator, and the Beat Wave Accelerator. For each of these the ultimate capability of the concept was examined as well as the next series of experiments which needs to be performed in order to advance the concept.

Date: April 12, 1982

Creator: Sessler, Andrew M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Costs and benefits of automotive fuel economy improvement: A partial analysis

This paper is an exercise in estimating the costs and benefits of technology-based fuel economy improvements for automobiles and light trucks. Benefits quantified include vehicle cots, fuel savings, consumer's surplus effects, the effect of reduced weight on vehicle safety, impacts on emissions of CO{sub 2} and criteria pollutants, world oil market and energy security benefits, and the transfer of wealth from US consumes to oil producers. A vehicle stock model is used to capture sales, scrappag… more

Date: March 1, 1992

Creator: Greene, D.L. (Oak Ridge National Lab., TN (United States)) & Duleep, K.G. (Energy and Environmental Analysis, Inc., Arlington, VA (United States))

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Thermophysical properties of argon

The entire report consists of tables of thermodynamic properties (including sound velocity, thermal conductivity and diffusivity, Prandtl number, density) of argon at 86 to 400/degree/K, in the form of isobars over 0.9 to 100 bars. (DLC)

Date: February 1, 1988

Creator: Jaques, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Vapor phase spectroscopy of complex lanthanide halide--aluminum halide molecular species

The absorption spectrum of ErCl/sub 3/ (AlCl/sub 3/)/sub x/ vapor complex was measured and analyzed using the Judd-Ofelt theory. Structural correlations in other AlCl/sub 3/ vapor complexes and radiation emission are discussed. Fluorescence of TbCl/sub 3/ (AlCl/sub 3/)/sub x/ vapor complex and in the NdCl/sub 3/ (AlCl/sub 3/)/sub x/ system were studied. (DLC)

Date: January 1, 1977

Creator: Carnall, W T; Hessler, J P; Williams, C W & Hoekstra, H R

Item Type: Article

Partner: UNT Libraries Government Documents Department