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Methane oxidation over dual redox catalysts

Description: Review and analysis of the literature data on electron transfer itself and electron transfer oxidation of alkyl radicals was done in order to understand the mechanism by which methyl radical can be oxidized to CH{sub 3}{sup +} and further substituted by OH{sup {minus}} to form methanol. This allowed to compare and classify the various possible reaction patterns, understand the mechanism and circumstances of operation of each of them and select those which can be involved in oxidation of methyl … more
Date: March 1, 1989
Creator: Klier, Kamil; Herman, Richard G. & Sojka, Zvigniew
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Methane oxidation over dual redox catalysts

Description: The objective of this research is to develop approaches to direct catalytic oxidation of methane over oxides that are doubly doped with transition metal ions. The desired process aims at employing a double redox mechanism, where one redox couple is utilized for activation of oxygen and another for the trapping of CH{sub 3} radicals. The methyl radicals can either recombine, giving C{sub 2} hydrocarbons, or be converted, via electron transfer reaction, to carbocations. The latter species can rea… more
Date: September 1, 1989
Creator: Klier, Kamil; Herman, Richard G. & Sojka, Zbigniew
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Binding and catalytic reduction of NO by transition metal aluminosilicates

Description: The objective of this research is to provide the scientific understanding of processes that actively and selectively reduce NO in dilute exhaust streams, as well as in concentrated streams, to N{sub 2}. Experimental studies of NO chemistry in transition metal-containing aluminosilicate catalysts are being carried out with the aim of determining the chemical rules for NO reduction on non-precious metals. The catalyst supports chosen for this investigation are A and Y zeolites, mordenite, and mon… more
Date: September 1, 1991
Creator: Klier, Kamil; Herman, Richard G. & Hou, Shaolie
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Potential for energy conservaton in the metal forming industries. Progress report, July 1, 1978-August 15, 1979

Description: Reduced energy consumption and improved product attributes are realizable benefits that are achievable through the adoption of optimal metal forming techniques. With the meteoric rise in energy costs, certain segments of the metal forming industries have accelerated their efforts in switching from energy intensive manufacturing techniques, e.g., casting, to metal forming, and, furthermore, from hot forming and machined components to cold forming, notably the automotive industry. The first year … more
Date: August 1, 1979
Creator: Avitzur, B.; Beidleman, C. R. & Smackey, B. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Post transcriptional regulation of chloroplast gene expression by nuclear encoded gene products

Description: The following is a review of research accomplished in the first two years of funding for the above mentioned project. The work performed is a molecular characterization of nuclear mutants of Chlamydomonas reinhardtii which are deficient in different stages in the post-transcriptional expression of a single chloroplast encoded polypeptide, the D2 protein of Photosystem II. Our long-term goals are to understand the molecular mechanisms by which nuclear gene products affect the expression of chlor… more
Date: January 1, 1992
Creator: Kuchka, Michael R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hydraulic fracture design optimization

Description: This research and development investigation, sponsored by US DOE and the oil and gas industry, extends previously developed hydraulic fracture geometry models and applied energy related characteristic time concepts towards the optimal design and control of hydraulic fracture geometries. The primary objective of this program is to develop rational criteria, by examining the associated energy rate components during the hydraulic fracture evolution, for the formulation of stimulation treatment des… more
Date: January 1, 1992
Creator: Lee, Tae-Soo & Advani, S. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Methane oxidation over dual redox catalysts

Description: The objective of this research is to develop the scientific background for direct catalytic oxidation of methane over oxides that are doubly doped with transition metal ions. The desired process aims at employing of a double redox mechanism, where one redox couple is utilized for activation of oxygen and another for the conversion of CH{sub 3} radicals to carbocations via electron transfer reaction. The latter species can react with surface OH{sup {minus}} groups to form methanol or formaldehyd… more
Date: June 1, 1989
Creator: Klier, Kamil; Herman, Richard G. & Sojka, Zbigniew
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Methane oxidation over dual redox catalysts

Description: The effect of doping lanthana-based catalysts with antimony and bismuth on the catalytic behavior toward the selective oxidation of methane has been studied. New catalytic results have been obtained upon doping the Sr/La{sub 2}O{sub 3} catalyst, obtained from AMOCO Oil Co., with the acidic Sb and Fe dopants. Both activity and selectivity of the original Sr/La{sub 2}O{sub 3} catalyst can be modified by introducing small amounts of either dopant. Iron doping lowered selectivity to C{sub 2} produc… more
Date: February 1, 1992
Creator: Klier, Kamil; Herman, Richard G. & Di Cosimo, Juana Isabel
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Methane oxidation over dual redox catalysts

Description: The objectives of this research were to achieve and understand the partial oxidation of methane to oxygenates and C{sub 2} hydrocarbons over dual redox catalysts. The catalysts were based on oxidic materials that will exhibit structural and thermal stability for long reactor lifetimes. A continuous flow reactor system with oxygen or air as the oxidizing gas, rather than nitrous oxide, was utilized over a wide range of temperatures ({le}1000{degrees}C), with variable gas hourly space velocity, i… more
Date: January 1, 1992
Creator: Klier, Kamil & Herman, Richard G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Novel Treatment for Acid Mine Drainage Utilizing Reclaimed Limestone Residual

Description: The viability of utilizing Reclaimed Limestone Residual (RLR) to remediate Acid Mine Drainage (AMD) was investigated. Physical and chemical characterization of RLR showed that it is composed of various minerals that contain significant quantities of limestone or calcium bearing compounds that can be exploited for acid neutralization. Acid Neutralization Potential (ANP) test results showed that RLR has a neutralization potential of approximately 83% as calcium carbonate (CaCO{sub 3}). Neutraliza… more
Date: August 31, 2004
Creator: Moo-Young, Horace K. & Ochola, Charles E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ethanol synthesis and water gas shift over bifunctional sulfide catalysts

Description: The objective of the proposed research is to investigate and develop a novel catalytic process for the conversion of coal-derived synthesis gas into high octane C{sub 1}-C{sub 4} alcohols, especially ethanol, by a highly selective and efficient pathway. (VC)
Date: March 1, 1992
Creator: Klier, Kamil & Herman, Richard G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Manufacture of superconducting wire. Progress report, February 1-October 15, 1979

Description: This report is divided into three major sections. The first section covers aspects of the manufacturing technology with existing and potential processes, and the second deals with the analysis of flow and fracture and the derivation of criteria to prevent failure. In the first section, typical present day procedure to assemble a billet, extrude and draw it, with intermediate and final anneals, is described. Then an hypothetical production line with potential alternative processes along the enti… more
Date: October 1, 1979
Creator: Avitzur, B.; Chou, Y. T.; Talbert, S. & Wu, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Role of structure in ion movement of glasses

Description: Can the structure of a melt much above the glass transition temperature (Tg) determine the structure and (transport) properties of glass In other words, are there extremely long lasting configurations in a melt which would affect ion transport in the glassy state A major effort during the past year has been to address these very fundamental questions. An important consideration here is to separate the effect of the variable melt structure from that of a variable cooling rate in the glass transf… more
Date: January 15, 1992
Creator: Jain, Himanshu
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mechanisms and controlling characteristics of the catalytic oxidation of methane

Description: Progress has included (1) construction and installation of an ultraviolet photoelectron spectrometer (UPS) with power supply and pumping system that has been added as an attachment to the SCIENTA ESCA-300 instrument, (2) modification of the high resolution electron energy loss spectrometer (HREELS) to produce a stable ultra high vacuum (UHV) environment for initial experiments with a Pd(311) single crystal, (3) construction of a separate high vacuum system for preparation of surface doped model… more
Date: January 1, 1990
Creator: Klier, Kamil
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Enhanced High Temperature Corrosion Resistance in Advanced Fossil Energy Systems by Nano-Passive Layer Formation

Description: Due to their excellent corrosion resistance, iron aluminum alloys are currently being considered for use as weld claddings in fossil fuel fired power plants. The susceptibility to hydrogen cracking of these alloys at higher aluminum concentrations has highlighted the need for research into the effect of chromium additions on the corrosion resistance of lower aluminum alloys. In the present work, three iron aluminum alloys were exposed to simulated coal combustion environments at 500 C and 700 C… more
Date: June 14, 2007
Creator: Marder, Arnold R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Use of Coal Drying to Reduce Water Consumed in Pulverized Coal Power Plants Quarterly Report: October-December 2005

Description: This is the twelfth Quarterly Report for this project. The background and technical justification for the project are described, including potential benefits of reducing fuel moisture using power plant waste heat, prior to firing the coal in a pulverized coal boiler. During this last Quarter, the development of analyses to determine the costs and financial benefits of coal drying was continued. The details of the model and key assumptions being used in the economic evaluation are described in t… more
Date: January 1, 2006
Creator: Levy, Edward; Bilirgen, Harun; Levy, Ursla; Sale, John & Sarunac, Nenad
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Use of Coal Drying to Reduce Water Consumed in Pulverized Coal Power Plants Quarterly Report: October-December 2004

Description: This is the eighth Quarterly Report for this project. The background and technical justification for the project are described, including potential benefits of reducing fuel moisture, prior to firing in a pulverized coal boiler. Analyses were performed to determine the effects of coal product moisture on unit performance. Results are given showing how the coal product moisture level affects parameters such as boiler efficiency, power required to drive the fluidizing air fan, other station servi… more
Date: March 1, 2005
Creator: Sarunac, Nenad & Levy, Edward
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Results from a hadron jet experiment at. sqrt. s = 19. 4 and 27. 4 GeV

Description: In Fermilab experiment E609 we have studied the production of high p/sub t/ hadron jets by beams of protons at 200 and 400 GeV/c and pions at 200 GeV/c. Results for the single-jet and di-jet cross sections are given and are compared to QCD predictions. Leading-particle charge ratios from di-jet events are given and compared to QCD-motivated predictions. Evidence is presented concerning a higher twist effect in ..pi..p interactions as predicted by Berger and Brodsky. Preliminary results on high … more
Date: January 1, 1984
Creator: Arenton, M. W.; Chen, H. F.; Corcoran, M.; Cormell, L. R.; Ditzler, W. R.; Dris, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Some characteristics of potential backfill materials

Description: A backfill material is one of the multiple barriers that may be involved in the disposal of nuclear waste. Such backfill should be a desiccant with the hydrous product having acceptable stability; it should sorb any released radioisotopes, and it should reseal any breached site. The backfill must also have acceptable thermal conductivity. This report presents data on the rate of hydration and the nature of the product of reaction of some candidate backfill materials with water and with brine. T… more
Date: May 1, 1983
Creator: Simpson, D. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Corrosion fatigue of iron-chromium-nickel alloys: Fracture mechanics, microstructure and chemistry

Description: This progress report briefly summarizes the research performed under the referenced grant for the period from 1 December 1990 to 31 December 1991, and contains a cumulative listing of technical presentations and publications dating back to 1 June 1988. Under this grant, a multi-disciplinary research program is undertaken to address certain fundamental issues relating to corrosion fatigue crack growth in structurally important alloys in aqueous environments. The principal goal of the research is… more
Date: January 29, 1992
Creator: Wei, Robert P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High resolution microstructural and microchemical analysis of zirconia eutectic interfaces

Description: The goal of the research performed here is to study and understand the nature of fine scale microchemical variation, on the order of the lattice periodicity, in ceramic oxides. To that end, during the past year, emphasis was placed on the selection of appropriate materials systems and their fabrication into samples suitable for study using advanced high resolution analytical electron microscopy (work to be performed in the coming year). The work concentrated on two materials systems.
Date: January 28, 1992
Creator: Notis, Michael R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Manufacture of superconducting wire. Progress report, February 1-October 15, 1979

Description: This report is divided into three major sections. The first section covers aspects of the manufacturing technology with existing and potential processes, and the second deals with the analysis of flow and fracture and the derivation of criteria to prevent failure. In the first section, typical present-day procedure to assemble a billet, extrude and draw it, with intermediate and final anneals, is described. Then an hypothetical production line with potential alternative processes along the enti… more
Date: October 1, 1979
Creator: Avitzur, B.; Chou, Y. T.; Talbert, S. & Wu, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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