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Chemical Hydride Slurry for Hydrogen Production and Storage

Description: The purpose of this project was to investigate and evaluate the attractiveness of using a magnesium chemical hydride slurry as a hydrogen storage, delivery, and production medium for automobiles. To fully evaluate the potential for magnesium hydride slurry to act as a carrier of hydrogen, potential slurry compositions, potential hydrogen release techniques, and the processes (and their costs) that will be used to recycle the byproducts back to a high hydrogen content slurry were evaluated. A 75… more
Date: September 30, 2008
Creator: McClaine, Andrew W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

2007 Nuclear Data Review

Description: The results of a review and evaluation of neutron and non-neutron nuclear data published in the scientific literature are presented. The status of new chemical elements is examined. Data on revised values for the isotopic composition of the elements are reviewed and recommended values are presented. Half-lives of very long-lived nuclides are presented, including double beta decay, double electron capture, long-lived alpha decay and long-lived beta decay. Data from new measurements on the very h… more
Date: May 5, 2008
Creator: Holden, N. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Primordial Compositions of Refractory Inclusions

Description: Bulk chemical and oxygen, magnesium and silicon isotopic compositions were measured for each of 17 Types A and B refractory inclusions from CV3 chondrites. After bulk chemical compositions were corrected for non-representative sampling in the laboratory, the Mg and Si isotopic compositions of each inclusion were used to calculate its original chemical composition assuming that the heavy-isotope enrichments of these elements are due to Rayleigh fractionation that accompanied their evaporation fr… more
Date: February 20, 2008
Creator: Grossman, L.; Simon, S. B.; Rai, V. K.; Thiemens, M. H.; Hutcheon, I. D.; Williams, R. W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Tape casting of magnesium oxide.

Description: A tape casting procedure for fabricating ceramic magnesium oxide tapes has been developed as a method to produce flat sheets of sintered MgO that are thin and porous. Thickness of single layer tapes is in the range of 200-400 {micro}m with corresponding surface roughness values in the range of 10-20 {micro}m as measured by laser profilometry. Development of the tape casting technique required optimization of pretreatment for the starting magnesium oxide (MgO) powder as well as a detailed study … more
Date: February 1, 2008
Creator: Ayala, Alicia; Corral, Erica L.; Loehman, Ronald E.; Bencoe, Denise Nora; Reiterer, Markus & Shah, Raja A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

IR Spectrometer Using 90-Degree Off-Axis Parabolic Mirrors

Description: A gated spectrometer has been designed for real-time, pulsed infrared (IR) studies at the National Synchrotron Light Source at the Brookhaven National Laboratory. A pair of 90-degree, off-axis parabolic mirrors are used to relay the light from an entrance slit to an output recording camera. With an initial wavelength range of 1500–4500 nm required, gratings could not be used in the spectrometer because grating orders would overlap. A magnesium oxide prism, placed between these parabolic mirrors… more
Date: March 1, 2008
Creator: Malone, Robert M. & McKenna, Ian J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Results of the 2007 B100 Quality Survey

Description: In a 2007 analysis of samples from 52% of U.S. biodiesel (B100) producers, 90% met ASTM and other specifications for critical engine performance properties and for elements that harm emission controls.
Date: March 1, 2008
Creator: Alleman, T. L. & McCormick, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Innovative Forming and Fabrication Technologies : New Opportunities.

Description: The advent of light metal alloys and advanced materials (polymer, composites, etc.) have brought the possibility of achieving important energy reductions into the full life cycle of these materials, especially in transportation applications. 1 These materials have gained acceptance in the aerospace industry but use of light metal alloys needs to gain wider acceptance in other commercial transportation areas. Among the main reasons for the relatively low use of these materials are the lack of ma… more
Date: January 31, 2008
Creator: Davis, B.; Hryn, J.; Systems, Energy & Kingston Process Metallurgy, Inc.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Safer Vehicles for People and the Planet

Description: Motor vehicles contribute to climate change and petroleum dependence. Improving their fuel economy by making them lighter need not compromise safety. The cars and trucks plying America's roads and highways generate roughly 20 percent of the nation's total emissions of carbon dioxide, a pollutant that is, of course, of increasing concern because of its influence on climate. Motor vehicles also account for most of our country's dependence on imported petroleum, the price of which has recently sky… more
Date: March 1, 2008
Creator: Wenzel, Thomas P; Wenzel, Thomas P & Ross, Marc
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Adaptive Localization Regions for O(N) Density Functional Theory

Description: A linear scaling approach for general and accurate pseudopotential Density Functional Theory calculations is presented. It is based on a Finite Difference discretization. Effective O(N) scaling is achieved by confining the orbitals in spherical localization regions. To improve accuracy and flexibility while computing the smallest possible number of orbitals, we propose an algorithm to adapt localization regions during computation. Numerical results for a polyacethylene chain and a magnesium oxi… more
Date: January 15, 2008
Creator: Fattebert, J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

THE HYDROLYSIS AND OXIDATION BEHAVIOR OF LITHIUM BOROHYDRIDE AND MAGNESIUM HYDRIDE DETERMINED BY CALORIMETRY

Description: Lithium borohydride, magnesium hydride and the 2:1 'destabilized' ball milled mixtures (2LiBH{sub 4}:MgH{sub 2}) underwent liquid phase hydrolysis, gas phase hydrolysis and air oxidation reactions monitored by isothermal calorimetry. The experimentally determined heats of reaction and resulting products were compared with those theoretically predicted using thermodynamic databases. Results showed a discrepancy between the predicted and observed hydrolysis and oxidation products due to both kine… more
Date: March 13, 2008
Creator: Brinkman, K; Donald Anton, D; Joshua Gray, J & Bruce Hardy, B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ductility Enhancement of Molybdenum Phase by Nano-sizedd Oxide Dispersions

Description: The present research is focused on ductility enhancement of molybdenum (Mo) alloys by adding nano-sized oxide particles to the alloy system. The research approach includes: (1) determination of microscopic mechanisms responsible for the macroscopic ductility enhancement effects through atomistic modeling of the metal-ceramic interface; (2) subsequent computer simulation-aided optimization of composition and nanoparticle size of the dispersion for improved performance; (3) synthesis and characte… more
Date: July 31, 2008
Creator: Kang, Bruce
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Synthesis of Mg(OH)2, MgO, and Mg nanoparticles using laser ablation of magnesium in water and solvents

Description: laser ablation of magnesium in deionized water (OW), solutions of OW and sodium dodecyl sulfate (50S) with different concentrations, acetone and 2-propanol has been conducted, The results showed that ablation in acetone and 2-propanol yielded MgO and Mg nanocrystallites as isolated particles and agglomerated chains probably intermixed with organic residues resulting from the alterationj decomposition of the solvents under the high-energy conditions. Brucite-like Mg(OH)2 particles were mainly pr… more
Date: January 1, 2008
Creator: Tran, P. X.; Howard, B. H.; Martello, D. V.; Soong, Y. & Chyu, M. K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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