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Direct Methane Conversion to Methanol
We proposed to demonstrate the effectiveness of a catalytic membrane reactor (a ceramic membrane combined with a catalyst) to selectively produce methanol by partial oxidation of methane. Methanol is used as a chemical feedstock, gasoline additive, and turbine fuel. Methane partial oxidation using a catalytic membrane reactor has been determined as one of the promising approaches for methanol synthesis from methane. In the original proposal, the membrane was used to be used to selectively remove methanol from the reaction zone before carbon oxides form, thus increasing the methanol yield. Methanol synthesis and separation in one step would also make methane more valuable for producing chemicals and fuels. The cooling tube inserted inside the membrane reactor has created a low temperature zone that rapidly quenches the product stream. This system has proved effective for increasing methanol selectivity during CH[sub 4] oxidation, and we are using and modifying this non-isothermal, non-permselective membrane reactor.
Date:
February 12, 1992
Creator:
Noble, R. D. & Falconer, J. L.
Object Type:
Report
System:
The UNT Digital Library
Technical Progress Report, November 1, 1979-October 31, 1980. Report Npl-865. [Univ. Of Colorado]
Work carried out at the Nuclear Physics Laboratory of the University of Colorado from November 1, 1979 through October 31, 1980 is summarized. Emphasis was on light ion reaction studies with the AVF cyclotron. The high resolution magnetic spectrometer has allowed studies of nucleon transfer, scattering, and charge exchange reactions throughout the periodic table. More experiments have been run with solid state counters this year than has been the case recently, as a broad range spectra of the light nuclei where only moderate resolution is demanded were examined. Several of these experiments were undertaken for more detailed studies of excitations seen with higher energy probes. Multiple coincidence measurements with neutron and gamma-ray counters have opened a new program in pre-equilibrium reactions and provided a new signature for the study of neutron-deficient final nuclei. The neutron time of flight program has expanded to higher excitation and to use of the (d,n) and (..cap alpha..,n) direct nucleon transfer reactions. Three important experiments were completed at the EPICS pion scattering facility at LAMPF, and other low energy pion scattering data were obtained at TRIUMF. Several (p,d) runs at high energies were accomplished, some with polarized beams at TRIUMF. High-lying structures in medium mass …
Date:
November 1, 1980
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Numerical Calculation of the Three Dimensional Electrical Field in the Central Region of a Cyclotron
To provide detailed and accurate electric fields in the ion source-puller region and at the dee dummy-dee gap for a cyclotron, a relaxation method solution of Laplace's equation has been used. A conventional difference equation with variation in mesh size and relaxation factor as well as different schemes for boundary corrections have been developed to achieve roughly 1 percent accuracy for a thre-dimensional domain with 10/sup 6/ mesh points. Although the computation requires considerable computer time, it is much less expensive than electrolytic tank analogue methods for measuring field distributions around complex electrode configurations.
Date:
January 1, 1981
Creator:
Chen, M. & Lind, D. A.
Object Type:
Article
System:
The UNT Digital Library
Direct Methane Conversion to Methanol. Annual Report, October 1, 1992--September 30, 1993
We proposed to demonstrate the effectiveness of a catalytic membrane reactor (a ceramic membrane combined with a catalyst) to selectively produce methanol by partial oxidation of methane. Methanol is used as a chemical feedstock, gasoline additive, and turbine fuel. Methane partial oxidation using a catalytic membrane reactor has been determined as one of the promising approaches for methanol synthesis from methane. In the original proposal, the membrane was used to selectively remove methanol from the reaction zone before carbon oxides form, thus increasing the methanol yield. Methanol synthesis and separation in one step would also make methane more valuable for producing chemicals and fuels. The cooling tube inserted inside the membrane reactor has created a low temperature zone that rapidly quenches the product stream. This system has proved effective for increasing methanol selectivity during CH{sub 4} oxidation. The membranes broke during experiments, however, apparently because of the large radial thermal gradient and axial thermal expansion difference. Our efforts concentrated on improving the membrane lifetime by modifying this non-isothermal membrane reactor.
Date:
October 1, 1993
Creator:
Noble, R. D. & Falconer, J. L.
Object Type:
Report
System:
The UNT Digital Library
Direct Conversion of Methane to Methanol in a Non-Isothermal Catalytic Membrane Reactor
The direct partial oxidation of CH{sub 4} to CH{sub 3}OH has been studied in a non-permselective, non-isothermal catalytic membrane reactor system. A cooling tube introduced coaxially inside a tubular membrane reactor quenches the product stream rapidly so that further oxidation of CH{sub 3}OH is inhibited. Selectivity for CH{sub 3}OH formation is significantly higher with quenching than in experiments without quenching. For CH{sub 4} conversion of 4% to 7% CH{sub 3}OH selectivity is 40% to 50% with quenching and 25% to 35% without quenching.
Date:
December 31, 1993
Creator:
Noble, R. D. & Falconer, J. L.
Object Type:
Article
System:
The UNT Digital Library
Chemically Assisted in Situ Recovery of Oil Shale. Technical Progress Report, April 1, 1991--June 30, 1991
The objective of this work is to investigate, in the laboratory, the parameters associated with a chemically assisted in situ recovery procedure, using hydrogen chloride (HCI), carbon dioxide (CO{sub 2}), and steam (H{sub 2}O), to obtain data useful to develop a process more economic than existing processes and to report all findings. Quarter summary: all modifications previously planned where completed and a reaction experiment was run. A couple design flaws were discovered, improvements were designed, and all parts are expected in the first week of July. Experiment {number_sign}6 is expected to run the following Monday. Barring further mishap, experiments will be run one each week thereafter. The project is behind schedule, but the project is well positioned to make significant and considerable progress.
Date:
December 1, 1991
Creator:
Ramirez, W. F.
Object Type:
Report
System:
The UNT Digital Library
Nuclear Physics Laboratory, University of Colorado Technical Progress Report, 1976 and Proposal for Continuation of Contract
This report summarizes the work carried out at the Nuclear Physics Laboratory of the University of Colorado during the period November 1, 1975 to November 1, 1976. The low energy nuclear physics section is dominated by light-ion reaction studies which span a wide range. These include both two-neutron and two-proton transfer reactions, charge exchange and inelastic scattering, as well as single nucleon transfer reactions. The nuclei studied vary widely in their mass and characteristics. These reaction studies have been aided by the multi-use scattering chamber which now allows the energy-loss-spectrometer beam preparation system (beam swinger) to shift from charged particle studies to neutron time-of-flight studies with a minimum loss of time. The intermediate energy section reflects the increase in activity accompanying the arrival of LAMPF data and the initiation of (p,d) studies at the Indiana separated-sector cyclotron. The nucleon removal results provided by the ..pi.. beam at EPICS previous to completion of the spectrometer have shown that nuclear effects dominate this process, so that the widely used free interaction picture is inadequate. The section entitled ''Other Activities'' reveals continuing activities in new applications of nuclear techniques to problems in medicine and biology. Reactions important to astrophysics continue to be investigated …
Date:
November 1, 1976
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Shallow Ground Water in the Boulder-Fort Collins-Greeley Area, Front Range Urban Corridor, Colorado, 1975-77
From introduction: This investigation was made as part of a comprehensive geohydrologic study of the Front Range Urban Corridor in Colorado conducted by the U.S. Geological Survey. The purpose of the study was to delineate the areal extent of the aquifer, the altitude and configuration of the water table, and the gradient and underflow in various parts of the area, in order to better understand the quality of water moving into and through the aquifer.
Date:
1983
Creator:
Schneider, Paul A., Jr.
Object Type:
Report
System:
The UNT Digital Library
[News Script: Orthodontist]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.
Date:
May 16, 1973, 6:00 p.m.
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
[Clipping: WASP Memorial Fly-In]
Newspaper clipping giving information about the Patriot's Parade. A list of former WASP with portraits and short biographies is also included.
Date:
May 28, 2005
Creator:
unknown
Object Type:
Clipping
System:
The Portal to Texas History
[Clipping: WASP Memorial Fly-In]
Newspaper clipping giving information about the Patriot's Parade. A list of former WASP with portraits and short biographies is also included.
Date:
May 28, 2005
Creator:
unknown
Object Type:
Clipping
System:
The Portal to Texas History
Analyses of Coals in the United States with Descriptions of Mine and Field Samples Collected between July 1, 1904 and June 30, 1910: Part 1. -- Analyses
From Significance and value of Analyses of Coal: "The analyses published in this report cover samples of coal collected in many different parts of the country with unusual care by experiences men, in such manner as to make them representative of extensive beds of coal."
Date:
1913
Creator:
Lord, N. W.
Object Type:
Report
System:
The UNT Digital Library
Analyses of Coals in the United States with Descriptions of Mine and Field Samples Collected between July 1, 1904 and June 30, 1910 Part 2. Descriptions of Samples
From Introduction: "This volume contains the descriptions of the samples whose analyses are published in the preceding volume, Part I of this bulletin. The descriptions have been compiled from the notebooks of the persons who collected the samples, have been condensed from accounts given in published reports of the United States Geological Survey, or have furnished by the collection themselves. Inasmuch as the descriptions represent the work of many persons during a period of six years, and inasmuch as they were recorded under widely differing conditions, they necessarily vary in fullness detail."
Date:
1913
Creator:
Lord, N. W.
Object Type:
Report
System:
The UNT Digital Library
Thermocouple Reference Tables Based on the IPTS-68
From Abstract: "Revised reference data for thermocouples have been generated in a cooperative program between groups of the National Bureau of Standards in Boulder and Gaithersburg.This Monograph contains tables, analytic expressions, various approximations, and explanatory text.
Date:
March 1974
Creator:
Powell, Robert L.; Hall, William J.; Hyink, Clyde H., Jr.; Sparks, Larry L.; Burns, George W.; Scroger, Margaret G. et al.
Object Type:
Report
System:
The UNT Digital Library
Microwave Spectral Tables: [Volume 1.] Diatomic Molecules
From Abstract: "For about 1500 spectral lines of diatomic molecules observed by coherent radiation techniques, measured frequencies, assigned quantum numbers, and newly computed intensities are given."
Date:
December 1, 1964
Creator:
Wacker, Paul F.; Mizushima, Masataka; Peterson, Jean D. & Ballard, Joe R.
Object Type:
Report
System:
The UNT Digital Library
Evolutions: A Study of George Crumb and Vox Balaenae
Access:
Use of this item is restricted to the UNT Community
Thesis written by a student in the UNT Honors College discussing the life of George Crumb, his compositions, and the natural world as his inspiration for Vox Balaenae.
Date:
Summer 2002
Creator:
Wilhelms, Jennifer Ann
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Direct Methane Conversion to Methanol. Annual Report, October 1993--September 1994
We proposed to demonstrate the effectiveness of a catalytic membrane reactor (a ceramic membrane combined with a catalyst) to selectively produce methanol by partial oxidation of methane. Methanol is used as a chemical feedstock, gasoline additive, and turbine fuel. Methane partial oxidation using a catalytic membrane reactor has been determined as one of the promising approaches for methanol synthesis from methane. In the original proposal, the membrane was used to selectively remove methanol from the reaction zone before carbon oxides form, thus increasing the methanol yield. Methanol synthesis and separation in one step would also make methane more valuable for producing chemicals and fuels. However, all the membranes tested in this laboratory lost their selectivity under the reaction conditions. A modified non-isothermal, non-permselective membrane reactor then was built and satisfactory results were obtained. The conversion and selectivity data obtained in this laboratory were better than that of the most published studies.
Date:
January 1, 1995
Creator:
Noble, R. D. & Falconer, J. L.
Object Type:
Report
System:
The UNT Digital Library
Treatment of the Tungsten Ores of Boulder County, Colo.
Report discussing the the development of milling practice in Boulder County, the ore-dressing methods in use, and the local manufacture of ferrotungsten and tungstic oxide. Figures giving the production of tungsten concentrates in the Boulder district, in the United States, and in the world; data on the buying of tungsten ores; costs of production; and the normal tungsten requirements in this country are presented.
Date:
October 1921
Creator:
Bonardi, J. P. & Williams, J. C.
Object Type:
Report
System:
The UNT Digital Library
Zeolite Membranes for Gas Separations
Silicalite-1, a pure silica zeolite, was deposited on a tubular, asymmetric, {gamma}-alumina support. Single gas permeation experiments with N{sub 2}, CH{sub 4}, and CO{sub 2} were carried out on the membrane. Separation experiments for N{sub 2}/CH{sub 4} mixtures were also conducted. Single-gas permeation of H{sub 2} and separation of H{sub 2}/SF{sub 6} mixture were also carried out with the membrane. Composite membranes of silicalite and Ni-SAPO-34 were also fabricated, but no CO{sub 2}/H{sub 2} selectivity was found. It is proposed to use these membranes for methanol synthesis and separation, and for separating H{sub 2} from gasification products for use as fuel cell fuel, etc.
Date:
June 1, 1995
Creator:
Falconer, J. & Noble, R.
Object Type:
Article
System:
The UNT Digital Library
Geophysical Prospecting: Some Electrical Methods
Technical paper issued by the Bureau of Mines over experiments in electrical methods. The methods and equipment used are presented and described. This paper includes tables, illustrations, and photographs.
Date:
1928
Creator:
Eve, A. S. & Keys, D. A.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B1314.0566]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Coach John Jacobs holds the Big Seven conference 100 yard dash trophy won last week at Boulder, Colo. by Juel Sweatte."
Date:
June 3, 1954
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1303.0032]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "An Autrhority on immunology, Dr. David W. Talmage, University of Colorado medical center, will be visiting professor Wednesday and Thursday of Oklahoma medical center."
Date:
April 23, 1962
Creator:
Winford, Wesley
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0387.0468]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Colorado coach Bill McCartney"
Date:
November 29, 1985
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0397.0575]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
January 6, 1990
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History