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in subjects: "Perovskite"  
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Methane coupling by membrane reactor, Quarterly technical progress report, September 1994--December 24, 1994

Description: Experimental studies presented in this report discuss the performance of porous VYCOR membrane reactors in which the oxidative coupling of methane was carried out in an excess of oxygen. This was accomplished by shortening the porous section of the membrane reactor and operating at lower W/F ratios. Results are also discussed from experiments in which methane gas flow was metered in from the high pressure shell side into the oxygen stream on the tube side of the membrane reactor. These studies … more
Date: April 14, 1995
Creator: Ma, Yi Hua
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Interim report on task 1.2: near equilibrium processing requirements part 1 of 2 to Lawrence Livermore National Laboratory for contract b345772

Description: The following ceramics were prepared for this study: the baseline ceramic, the baseline ceramic plus process impurities, a zirconolite-rich composition, a brannerite-rich composition, a composition designed to have {approx} 10% perovskite in addition to the normal baseline phases, and an {approx} 10% phosphate-doped batch. These samples were prepared by oxide (via wet or dry milling) and alkoxide-routes. The milling method has a direct effect on the samples. Incomplete milling leads to inhomoge… more
Date: April 5, 1999
Creator: Stewart, M W A; Vance, E R; Day, R A & Brownscombe, A
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solid Solubilities of Pu, U, Gd and Hf in Candidate Ceramic Nuclear Wasteforms

Description: This goal of this research project was to determine the solid solubility of Pu, U, Gd, and Hf in candidate ceramics for immobilization of high-level nuclear waste. The experimental approach was to saturate each phase by adding more than the solid solubility limit of the given cation, using a nominated substitution scheme, and then analyzing the candidate phase that formed to evaluate the solid solubility limit under firing conditions. Confirmation that the solid solution limit had been reached … more
Date: April 2, 2001
Creator: Vance, Eric R.; Carter, M. L.; Lumpkin, G. R.; Day, R. A. & Begg, B. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Oxygen Transport Ceramic Membranes Quarterly Report

Description: This report covers the following tasks: Task 1--Design, fabricate and evaluate ceramic to metal seals based on graded ceramic powder/metal braze joints; Task 2--Evaluate the effect of defect configuration on ceramic membrane conductivity and long term chemical and structural stability; Task 3--Determine materials mechanical properties under conditions of high temperatures and reactive atmospheres; Task 4--Evaluate phase stability and thermal expansion of candidate perovskite membranes and devel… more
Date: April 1, 2002
Creator: Bandopadhyay, Sukumar & Nagabhushana, Nagendra
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A NOVEL MEMBRANE REACTOR FOR DIRECT HYDROGEN PRODUCTION FROM COAL

Description: Gas Technology Institute is developing a novel concept of membrane gasifier for high efficiency, clean and low cost production of hydrogen from coal. The concept incorporates a hydrogen-selective membrane within a gasification reactor for direct extraction of hydrogen from coal synthesis gases. The objective of this project is to determine the technical and economic feasibility of this concept by screening, testing and identifying potential candidate membranes under high temperature, high press… more
Date: April 26, 2004
Creator: Doong, Shain; Ong, Estela; Atroshenko, Mike; Roberts, Mike & Lau, Francis
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A NOVEL MEMBRANE REACTOR FOR DIRECT HYDROGEN PRODUCTION FROM COAL

Description: Gas Technology Institute is developing a novel concept of membrane reactor coupled with a gasifier for high efficiency, clean and low cost production of hydrogen from coal. The concept incorporates a hydrogen-selective membrane within a gasification reactor for direct extraction of hydrogen from coal-derived synthesis gases. The objective of this project is to determine the technical and economic feasibility of this concept by screening, testing and identifying potential candidate membranes und… more
Date: April 28, 2005
Creator: Doong, Shain; Ong, Estela; Atroshenko, Mike; Lau, Francis & Roberts, Mike
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electrical Conductivity of the Lower-Mantle Ferropericlase

Description: Electrical conductivity of the lower-mantle ferropericlase-(Mg{sub 0.75},Fe{sub 0.25})O has been studied using designer diamond anvils to pressures over one megabar and temperatures up to 500 K. The electrical conductivity of (Mg{sub 0.75},Fe{sub 0.25})O gradually rises by an order of magnitude up to 50 GPa but decreases by a factor of approximately three between 50 to 70 GPa. This decrease in the electrical conductivity is attributed to the electronic high-spin to low-spin transition of iron i… more
Date: April 19, 2007
Creator: Lin, J. F.; Weir, S. T.; Jackson, D. D.; Evans, W. J.; Vohra, Y. K.; Qiu, W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Direct Carbon Fuel Cell System Utilizing Solid Carbonaceous Fuels

Description: This 1-year project has achieved most of its objective and successfully demonstrated the viability of the fluidized bed direct carbon fuel cell (FB-DCFC) approach under development by Direct Carbon technologies, LLC, that utilizes solid carbonaceous fuels for power generation. This unique electrochemical technology offers high conversion efficiencies, produces proportionately less CO{sub 2} in capture-ready form, and does not consume or require water for gasification. FB-DCFC employs a speciali… more
Date: April 30, 2010
Creator: Gur, Turgut
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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