Method for Extracting and Sequestering Carbon Dioxide (open access)

Method for Extracting and Sequestering Carbon Dioxide

A method and apparatus to extract and sequester carbon dioxide (CO2) from a stream or volume of gas wherein said method and apparatus hydrates CO2, and reacts the resulting carbonic acid with carbonate. Suitable carbonates include, but are not limited to, carbonates of alkali metals and alkaline earth metals, preferably carbonates of calcium and magnesium. Waste products are metal cations and bicarbonate in solution or dehydrated metal salts, which when disposed of in a large body of water provide an effective way of sequestering CO2 from a gaseous environment.
Date: May 10, 2005
Creator: Rau, Gregory H. & Caldeira, Kenneth G.
System: The UNT Digital Library
Enhanced adhesion for LIGA microfabrication by using a buffer layer (open access)

Enhanced adhesion for LIGA microfabrication by using a buffer layer

The present invention is an improvement on the LIGA microfabrication process wherein a buffer layer is applied to the upper or working surface of a substrate prior to the placement of a resist onto the surface of the substrate. The buffer layer is made from an inert low-Z material (low atomic weight), a material that absorbs secondary X-rays emissions from the substrate that are generated from the substrate upon exposure to a primary X-rays source. Suitable materials for the buffer layer include polyamides and polyimide. The preferred polyimide is synthesized from pyromellitic anhydride and oxydianiline (PMDA-ODA).
Date: May 22, 1998
Creator: Bajikar, Sateesh S.; DeCarlo, Francesco & Song, Joshua J.
System: The UNT Digital Library
A unique system of Fe/Pd for magneto-optical recording and magnetic switching devices (open access)

A unique system of Fe/Pd for magneto-optical recording and magnetic switching devices

This invention is comprised of a high density magneto-optical information storage medium utilizing the properties of an ultrathin iron film on a palladium substrate. The present invention comprises a magneto-optical medium capable of thermal and magnetic stability and capable of possessing a vertical orientation of the magnetization vector for the magnetic material. Data storage relies on the temperature dependence of the coercivity of the ultrathin film. Data retrieval derives from the Kerr effect which describes the direction of rotation of a plane of polarized light traversing the ultrathin magnetic material as a function of the orientation of the magnetization vector.
Date: May 22, 1990
Creator: Liu, Chian Q. & Bader, S. D.
System: The UNT Digital Library
Control Coil Arrangement for a Rotating Machine Rotor (open access)

Control Coil Arrangement for a Rotating Machine Rotor

A rotating machine (e.g., a turbine, motor or generator) is provided wherein a fixed solenoid or other coil configuration is disposed adjacent to one or both ends of the active portion of the machine rotor for producing an axially directed flux in the active portion so as to provide planar axial control at single or multiple locations for rotor balance, levitation, centering, torque and thrust action. Permanent magnets can be used to produce an axial bias magnetic field. The rotor can include magnetic disks disposed in opposed, facing relation to the coil configuration.
Date: May 5, 1999
Creator: Shah, Manoj R. & Lewandowski, Chad R.
System: The UNT Digital Library
Stator for Rotating Electrical Machine Having Multiple Controlwindings (open access)

Stator for Rotating Electrical Machine Having Multiple Controlwindings

A rotating electric machine is provided which includes multiple independent control windings for compensating for rotor imbalances and for levitating/centering the rotor. The multiple independent control windings are placed at different axial locations along the rotor to oppose forces created by imbalances at different axial locations along the rotor. The multiple control windings can also be used to levitate/center the rotor with a relatively small magnetic field per unit area since the rotor and/or the main power winding provides the biasfield.
Date: May 5, 1999
Creator: Shah, Manoj R. & Lewandowski, Chad R.
System: The UNT Digital Library
Titanium Carbide Bipolar Plate for Electrochemical Devices (open access)

Titanium Carbide Bipolar Plate for Electrochemical Devices

Titanium carbide comprises a corrosion resistant, electrically conductive, non-porous bipolar plate for use in an electrochemical device. The process involves blending titanium carbide powder with a suitable binder material, and molding the mixture, at an elevated temperature and pressure.
Date: May 8, 1998
Creator: LaConti, Anthony B.; Griffith, Arthur E.; Cropley, Cecelia C. & Kosek, John A.
System: The UNT Digital Library
Polymer Coating for Immobilizing Soluble Ions in a Phosphate Ceramic Product (open access)

Polymer Coating for Immobilizing Soluble Ions in a Phosphate Ceramic Product

A polymer coating is applied to the surface of a phosphate ceramic composite to effectively immobilize soluble salt anions encapsulated within the phosphate ceramic composite. The polymer coating is made from ceramic materials, including at least one inorganic metal compound, that wet and adhere to the surface structure of the phosphate ceramic composite, thereby isolating the soluble salt anions from the environment and ensuring long-term integrity of the phosphate ceramic composite.
Date: May 5, 1999
Creator: Singh, Dileep; Wagh, Arun S. & Patel, Kartikey D.
System: The UNT Digital Library
Cyanoethylated Compounds as Additives in Lithium/Lithium Ion Batteries (open access)

Cyanoethylated Compounds as Additives in Lithium/Lithium Ion Batteries

The power loss of lithium/lithium ion battery cells is significantly reduced, especially at low temperatures, when about 1% by weight of an additive is incorporated in the electrolyte layer of the cells. The usable additives are organic solvent soluble cyanoethylated polysaccharides and poly(vinyl alcohol). The power loss decrease results primarily from the decrease in the charge transfer resistance at the interface between the electrolyte and the cathode.
Date: May 8, 1998
Creator: Nagasubramanian, Ganesan
System: The UNT Digital Library
Method for Producing Chemically Bonded Phosphate Ceramics and for Stabilizing Contaminants Encapsulated therein Utilizing Reducing Agents (open access)

Method for Producing Chemically Bonded Phosphate Ceramics and for Stabilizing Contaminants Encapsulated therein Utilizing Reducing Agents

Known phosphate ceramic formulations are improved and the ability to produce iron-based phosphate ceramic systems is enabled by the addition of an oxidizing or reducing step during the acid-base reactions that form the phosphate ceramic products. The additives allow control of the rate of the acid-base reactions and concomitant heat generation. In an alternate embodiment, waste containing metal anions is stabilized in phosphate ceramic products by the addition of a reducing agent to the phosphate ceramic mixture. The reduced metal ions are more stable and/or reactive with the phosphate ions, resulting in the formation of insoluble metal species within the phosphate ceramic matrix, such that the resulting chemically bonded phosphate ceramic product has greater leach resistance.
Date: May 5, 1999
Creator: Singh, Dileep; Wagh, Arun S. & Jeong, Seung-Young
System: The UNT Digital Library
X-Ray Imaging Crystal Spectrometer for Extended X-Ray Sources (open access)

X-Ray Imaging Crystal Spectrometer for Extended X-Ray Sources

Spherically or toroidally curved, double focusing crystals are used in a spectrometer for X-ray diagnostics of an extended X-ray source such as a hot plasma produced in a tokamak fusion experiment to provide spatially and temporally resolved data on plasma parameters such as ion temperature, toroidal and poloidal rotation, electron temperature, impurity ion charge-state distributions, and impurity transport. The imaging properties of these spherically or toroidally curved crystals provide both spectrally and spatially resolved X-ray data from the plasma using only one small spherically or toroidally curved crystal, thus eliminating the requirement for a large array of crystal spectrometers and the need to cross-calibrate the various crystals.
Date: May 1, 1999
Creator: Bitter, Manfred L.; Fraekel, Benjamin; Gorman, James L.; Hill, Kenneth W.; Roquemore, Lane A.; Stodiek, Wolfgang et al.
System: The UNT Digital Library
Near-Electrode Imager (open access)

Near-Electrode Imager

An apparatus, near-electrode imager, for employing nuclear magnetic resonance imaging to provide in situ measurements of electrochemical properties of a sample as a function of distance from a working electrode. The near-electrode imager use the radio frequency field gradient within a cylindrical toroid cavity resonator to provide high-resolution nuclear magnetic resonance spectral information on electrolyte materials.
Date: May 1, 1999
Creator: Rathke, Jerome W.; Klingler, Robert J.; Woelk, Klaus & Gerald, Rex E., II
System: The UNT Digital Library