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in subjects: "Pressure Range Mega Pa"  
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Comments on Economides and Ehlig-Economides,"Sequestering carbon dioxide in a closed underground volume," SPE 124430, October 2009

Description: The paper examines the pressure increase resulting from injection of CO2 into a 1D radial system with closed boundaries. The finding is that unacceptably high pressures are obtained when only 1% or less of the pore volume is occupied by injected CO2. These results are used to make the general conclusion that large-scale CCS is not feasible.
Date: October 22, 2009
Creator: Oldenburg, Curt; Pruess, Karsten; Birkholzer, Jens & Doughty, Christine
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Magnetically applied pressure-shear : a new technique for direct strength measurement at high pressure (final report for LDRD project 117856).

Description: A new experimental technique to measure material shear strength at high pressures has been developed for use on magneto-hydrodynamic (MHD) drive pulsed power platforms. By applying an external static magnetic field to the sample region, the MHD drive directly induces a shear stress wave in addition to the usual longitudinal stress wave. Strength is probed by passing this shear wave through a sample material where the transmissible shear stress is limited to the sample strength. The magnitude of… more
Date: September 1, 2010
Creator: Lamppa, Derek C.; Haill, Thomas A.; Alexander, C. Scott & Asay, James Russell
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Size dependence of cubic to trigonal structural distortion in silver micro- and nanocrystals under high pressure

Description: Silver micro- and nanocrystals with sizes of {approx}2--3.5 {mu}m and {approx}50--100 nm were uniaxially compressed under nonhydrostatic pressures (strong deviatoric stress) up to {approx}30 GPa at room temperature in a symmetric diamond-anvil cell and studied in situ using angle-dispersive synchrotron X-ray diffraction. A cubic to trigonal structural distortion along a 3-fold rotational axis was discovered by careful and comprehensive analysis of the apparent lattice parameter and full width a… more
Date: January 1, 2008
Creator: Guo, Qixum; Zhao, Yusheng; Zin, Zhijun; Wang, Zhongwu; Skrabalak, Sara E & Xia, Younan
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

NSLS 2007 Activity Report (National Synchrotron Light Source Activity Report 2007)

Description: The National Synchrotron Light Source is one of the world's most productive and cost-effective user facilities. With 2,219 individual users, about 100 more than last year, and a record-high 985 publications, 2007 was no exception. In addition to producing an impressive array of science highlights, which are included in this Activity Report, many NSLS users were honored this year for their scientific accomplishments. Throughout the year, there were major strides in the development of the scienti… more
Date: May 1, 2008
Creator: Miller ,L. & Nasta, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of Comprehensive Detailed and Reduced Reaction Mechanisms for Syngas and Hydrogen Combustion

Description: The collaborative research initiative culminated in amassing a substantial combustion database of experimental results for dry and moist mixtures of syngas and hydrogen (SGH), including autoignition times using a rapid compression machine as well as laminar flame speeds using a counterflow twin-flame configuration. These experimental data provided the basis for assessment of the kinetics of SGH combustion at elevated pressures using global uncertainty analysis methods. A review of the fundament… more
Date: February 28, 2009
Creator: Sung, Chih-Jen; Wang, Hai & Violi, Angela
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Soret Effect Study on High-Pressure CO2-Water Solutions Using UV-Raman Spectroscopy and a Concentric-Tube Optical Cell

Description: Spatially resolved deep-UV Raman spectroscopy was applied to solutions of CO2 and H2O (or D2O), which were subject to a temperature gradient in a thermally regulated high-pressure concentric-tube Raman cell in an attempt to measure a Soret effect in the vicinity of the critical point of CO2. Although Raman spectra of solutions of CO2 dissolved in D2O at 10 MPa and temperatures near the critical point of CO2 had adequate signal-to-noise and spatial resolution to observe a Soret effect with a Sor… more
Date: January 1, 2012
Creator: Windisch, Charles F.; McGrail, B. Peter & Maupin, Gary D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solution Effects on Cesium Complexation with Calixarene - Crown Ethers from Liquid to Supercritical Fluids

Description: Supercritical fluid CO2 is an alternative solvent for extraction of metals. The solubility parameter of supercritical CO2 varies with density resembling that of liquid hexane at moderate pressures in the supercritical region to those of chlorinated solvents at very high pressures. By changing density of supercritical CO2, the solvation environment of a metal chelate system can vary continuously and resembles over a wide range of solvents. Thus, supercritical CO2 provides a unique system for stu… more
Date: June 1, 1999
Creator: Wai, Chien M. & Yonker, Clem
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Molecular Surface Chemistry by Metal Single Crystals and Nanoparticles from Vacuum to High Pressure.

Description: Model systems for studying molecular surface chemistry have evolved from single crystal surfaces at low pressure to colloidal nanoparticles at high pressure. Low pressure surface structure studies of platinum single crystals using molecular beam surface scattering and low energy electron diffraction techniques probe the unique activity of defects, steps and kinks at the surface for dissociation reactions (H-H, C-H, C-C, O{double_bond}O bonds). High-pressure investigations of platinum single cry… more
Date: April 5, 2008
Creator: Somorjai, Gabor A. & Park, Jeong Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Sensitivity of Fischer-Tropsch Synthesis and Water-Gas Shift Catalysts to Poisons from High-Temperature High-Pressure Entrained-Flow (EF) Oxygen-Blown Gasifier Gasification of Coal/Biomass Mixtures

Description: The successful adaptation of conventional cobalt and iron-based Fischer-Tropsch synthesis catalysts for use in converting biomass-derived syngas hinges in part on understanding their susceptibility to byproducts produced during the biomass gasification process. With the possibility that oil production will peak in the near future, and due to concerns in maintaining energy security, the conversion of biomass-derived syngas and syngas derived from coal/biomass blends to Fischer-Tropsch synthesis … more
Date: September 30, 2010
Creator: Davis, Burtron; Jacobs, Gary; Ma, Wenping; Azzam, Khalid; Sparks, Dennis & Shafer, Wilson
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sensitivity of Fischer-Tropsch Synthesis and Water-Gas Shift Catalystes to Poisons form High-Temperature High-Pressure Entrained-Flow (EF) Oxygen-Blown Gasifier Gasification of Coal/Biomass Mixtures

Description: There has been a recent shift in interest in converting not only natural gas and coal derived syngas to Fischer-Tropsch synthesis products, but also converting biomass-derived syngas, as well as syngas derived from coal and biomass mixtures. As such, conventional catalysts based on iron and cobalt may not be suitable without proper development. This is because, while ash, sulfur compounds, traces of metals, halide compounds, and nitrogen-containing chemicals will likely be lower in concentratio… more
Date: September 30, 2009
Creator: Davis, Burton; Jacobs, Gary; Ma, Wenping; Azzam, Khalid; ChakkamadathilMohandas, Janet & Shafer, Wilson
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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