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Improved MCFC performance with Li/Na/Ba/Ca carbonate electrolyte.

Description: Earlier electrolyte segregation tests of Li/Na carbonate used chemical analysis such as inductively coupled plasma/atomic emission spectroscopy (ICP/AES) of matrix strips wetted with carbonate and exposed to 5- to 20-V potential gradients. A segregation factor was correlated to the Li/Na carbonate composition. While fairly substantial segregation occurs at the eutectic composition of 52% Li, it is minimal at 60% to 75% Li. Such lithium-rich Li/Na carbonates may not be practical because the melt… more
Date: July 21, 1999
Creator: Centeno, C.-J.; Kaun, T. D.; Krumpelt, M. & Schoeler, A.
Partner: UNT Libraries Government Documents Department
open access

Non-segregating electrolytes for molten carbonate fuel cells

Description: Argonne National Laboratory is developing molten carbonate electrolyte compositions which have minimal segregation in the individual fuel cell and cell stack under an electric field. The approach is to characterize Li-Na carbonate mixtures in terms of their segregation properties in an electric field and, if necessary, to modify the observed segregation by adding Ba and Ca carbonates. Both non-segregating properties and MCFC test-cell performance show improvement as the lithium content is modif… more
Date: September 1, 1997
Creator: Kaun, T.D.; Bloom, I.D. & Krumpelt, M.
Partner: UNT Libraries Government Documents Department
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Calorimetric Studies of the Energetics of Order-Disorder in the System Mg(1-x)Fe(x)Ca(CO(3))(2)

Description: Calorimetric studies by Chai and Navrotsky (1996) on dolomite-ankerite energetic have been extended by including two additional types of samples: a very disordered stoichiometric MgCa(CO{sub 3}){sub 2} prepared from low temperature aqueous solution and three largely ordered natural samples of intermediate iron content. Combining these data with previous work, three distinct trends of energetic can be seen: those for samples with nearly complete order, nearly complete disorder, and intermediate … more
Date: February 10, 1999
Creator: Brady, P.; Dooley, D.; Navrotsky, A. & Reeder, R.
Partner: UNT Libraries Government Documents Department
open access

Carbon Dioxide Capture From Flue Gas Using Dry Regenerable Sorbents Quarterly Technical Progress Report: October-December 2002

Description: The objective of this project is to develop a simple and inexpensive process to separate CO{sub 2} as an essentially pure stream from a fossil fuel combustion system using a regenerable sorbent. The sorbents being investigated in this project are primarily alkali carbonates, and particularly sodium carbonate and potassium carbonate, which are converted to bicarbonates or intermediate salts through reaction with carbon dioxide and water vapor. Bicarbonates are regenerated to carbonates when heat… more
Date: January 1, 2003
Creator: Green, David A.; Turk, Brian S.; Portzer, Jeffrey W.; Gupta, Raghubir P.; McMichael, William J.; Liang, Ya et al.
Partner: UNT Libraries Government Documents Department
open access

Catalytic Gasification of Coal using Eutectic Salt Mixtures

Description: The objectives of this study are to: identify appropriate eutectic salt mixture catalysts for coal gasification; assess agglomeration tendency of catalyzed coal; evaluate various catalyst impregnation techniques to improve initial catalyst dispersion; evaluate effects of major process variables (such as temperature, system pressure, etc.) on coal gasification; evaluate the recovery, regeneration and recycle of the spent catalysts; and conduct an analysis and modeling of the gasification process… more
Date: December 4, 1998
Creator: Sheth, Atul; Agrawal, Pradeep & Yeboah, Yaw D.
Partner: UNT Libraries Government Documents Department
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Method for Extracting and Sequestering Carbon Dioxide

Description: 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 prov… more
Date: May 10, 2005
Creator: Rau, Gregory H. & Caldeira, Kenneth G.
Partner: UNT Libraries Government Documents Department
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SURFACTANT BASED ENHANCED OIL RECOVERY AND FOAM MOBILITY CONTROL

Description: Surfactant flooding has the potential to significantly increase recovery over that of conventional waterflooding. The availability of a large number of surfactant structures makes it possible to conduct a systematic study of the relation between surfactant structure and its efficacy for oil recovery. Also, the addition of an alkali such as sodium carbonate makes possible in situ generation of surfactant and significant reduction of surfactant adsorption. In addition to reduction of interfacial … more
Date: February 1, 2004
Creator: Hirasaki, George J.; Miller, Clarence A.; Pope, Gary A. & Jackson, Richard E.
Partner: UNT Libraries Government Documents Department
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Calcium Carbonate Production by Coccolithophorid Algae in Long Term Carbon Dioxide Sequestration

Description: Predictions of increasing levels of anthropogenic carbon dioxide (CO{sub 2}) and the specter of global warming have intensified research efforts to identify ways to sequester carbon. A number of novel avenues of research are being considered, including bioprocessing methods to promote and accelerate biosequestration of CO{sub 2} from the environment through the growth of organisms such as coccolithophorids, which are capable of sequestering CO{sub 2} relatively permanently. Calcium and magnesiu… more
Date: October 30, 2003
Creator: Fabry, V. J.
Partner: UNT Libraries Government Documents Department
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Calcium Carbonate Production by Coccolithophorid Algae in Long Term, Carbon Dioxide Sequestration

Description: Predictions of increasing levels of anthropogenic carbon dioxide (CO{sub 2}) and the specter of global warming have intensified research efforts to identify ways to sequester carbon. A number of novel avenues of research are being considered, including bioprocessing methods to promote and accelerate biosequestration of CO{sub 2} from the environment through the growth of organisms such as coccolithophorids, which are capable of sequestering CO{sub 2} relatively permanently. Calcium and magnesiu… more
Date: October 30, 2004
Creator: Fabry, V. J.
Partner: UNT Libraries Government Documents Department
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''The Influence of Calcium Carbonate Grain Coatings on Contaminant Reactivity in Vadose Zone Sediments''

Description: Our component of this project focuses on the reaction of contaminant-containing fluids with carbonate mineral surfaces in order to better understand the dissolution-growth and related solid-solution processes that ultimately affect contaminant mobility in settings containing carbonates or carbonate grain coatings. Our collaborators (Stanford, PNNL) have focused on other aspects of carbonate and carbonate mineral surfaces as part of the overall project. Because some of the sediments through whic… more
Date: June 11, 2003
Creator: Eggleston, Carrick M.
Partner: UNT Libraries Government Documents Department
open access

Non-segregating electrolytes for molten carbonate fuel cells

Description: Current MCFCs use a Li/K carbonate mixture; the segregation increases the K concentration near the cathode, leading to increase cathode solubility and performance decline. ANL is developing molten carbonates that have minimal segregation; the approach is using Li-Na carbonates. In screening tests, fully developed potential distributions were obtained for 4 Li/Na compositions, and performance data were used to compare these.
Date: August 1, 1996
Creator: Krumpelt, M.; Kaun, T. & Lanagan, M.
Partner: UNT Libraries Government Documents Department
open access

CALCIUM CARBONATE PRODUCTION BY COCCOLITHOPHORID ALGAE IN LONG TERM, CARBON DIOXIDE SEQUESTRATION

Description: Predictions of increasing levels of anthropogenic carbon dioxide (CO{sub 2}) and the specter of global warming have intensified research efforts to identify ways to sequester carbon. A number of novel avenues of research are being considered, including bioprocessing methods to promote and accelerate biosequestration of CO{sub 2} from the environment through the growth of organisms such as coccolithophorids, which are capable of sequestering CO{sub 2} relatively permanently. Calcium and magnesiu… more
Date: September 30, 2002
Creator: V.J. Fabry, Ph.D.
Partner: UNT Libraries Government Documents Department
open access

CALCIUM CARBONATE PRODUCTION BY COCCOLITHOPHORID ALGAE IN LONG TERM, CARBON DIOXIDE SEQUESTRATION

Description: Predictions of increasing levels of anthropogenic carbon dioxide (CO{sub 2}) and the specter of global warming have intensified research efforts to identify ways to sequester carbon. A number of novel avenues of research are being considered, including bioprocessing methods to promote and accelerate biosequestration of CO{sub 2} from the environment through the growth of organisms such as coccolithophorids, which are capable of sequestering CO{sub 2} relatively permanently. Calcium and magnesiu… more
Date: December 15, 2002
Creator: V.J. Fabry, Ph.D.
Partner: UNT Libraries Government Documents Department
open access

Calcium Carbonate Production by Coccolithaphorid Algae in Long Term, Carbon Dioxide Sequestration

Description: Predictions of increasing levels of anthropogenic carbon dioxide (CO{sub 2}) and the specter of global warming have intensified research efforts to identify ways to sequester carbon. A number of novel avenues of research are being considered, including bioprocessing methods to promote and accelerate biosequestration of CO{sub 2} from the environment through the growth of organisms such as coccolithophorids, which are capable of sequestering CO{sub 2} relatively permanently. Calcium and magnesiu… more
Date: January 30, 2004
Creator: Fabry, V. J.
Partner: UNT Libraries Government Documents Department
open access

CALCIUM CARBONATE PRODUCTION BY COCCOLITHOPHORID ALGAE IN LONG TERM, CARBON DIOXIDE SEQUESTRATION

Description: Predictions of increasing levels of anthropogenic carbon dioxide (CO{sub 2}) and the specter of global warming have intensified research efforts to identify ways to sequester carbon. A number of novel avenues of research are being considered, including bioprocessing methods to promote and accelerate biosequestration of CO{sub 2} from the environment through the growth of organisms such as coccolithophorids, which are capable of sequestering CO{sub 2} relatively permanently. Calcium and magnesiu… more
Date: December 15, 2001
Creator: V.J. Fabry, Ph.D.
Partner: UNT Libraries Government Documents Department
open access

CALCIUM CARBONATE PRODUCTION BY COCCOLITHOPHORID ALGAE IN LONG TERM, CARBON DIOXIDE SEQUESTRATION

Description: Predictions of increasing levels of anthropogenic carbon dioxide (CO{sub 2}) and the specter of global warming have intensified research efforts to identify ways to sequester carbon. A number of novel avenues of research are being considered, including bioprocessing methods to promote and accelerate biosequestration of CO{sub 2} from the environment through the growth of organisms such as coccolithophorids, which are capable of sequestering CO{sub 2} relatively permanently. Calcium and magnesiu… more
Date: July 9, 2002
Creator: V.J. Fabry, Ph.D.
Partner: UNT Libraries Government Documents Department
open access

CALCIUM CARBONATE PRODUCTION BY COCCOLITHOPHORID ALGAE IN LONG TERM, CARBON DIOXIDE SEQUESTRATION

Description: Predictions of increasing levels of anthropogenic carbon dioxide (CO{sub 2}) and the specter of global warming have intensified research efforts to identify ways to sequester carbon. A number of novel avenues of research are being considered, including bioprocessing methods to promote and accelerate biosequestration of CO{sub 2} from the environment through the growth of organisms such as coccolithophorids, which are capable of sequestering CO{sub 2} relatively permanently. Calcium and magnesiu… more
Date: April 15, 2003
Creator: V.J. Fabry, Ph.D.
Partner: UNT Libraries Government Documents Department
open access

CALCIUM CARBONATE PRODUCTION BY COCCOLITHOPHORID ALGAE IN LONG TERM, CARBON DIOXIDE SEQUESTRATION

Description: Predictions of increasing levels of anthropogenic carbon dioxide (CO{sub 2}) and the specter of global warming have intensified research efforts to identify ways to sequester carbon. A number of novel avenues of research are being considered, including bioprocessing methods to promote and accelerate biosequestration of CO{sub 2} from the environment through the growth of organisms such as coccolithophorids, which are capable of sequestering CO{sub 2} relatively permanently. Calcium and magnesiu… more
Date: April 5, 2002
Creator: V.J. Fabry, Ph.D.
Partner: UNT Libraries Government Documents Department
open access

CALCIUM CARBONATE PRODUCTION BY COCCOLITHOPHORID ALGAE IN LONG TERM, CARBON DIOXIDE SEQUESTRATION

Description: Predictions of increasing levels of anthropogenic carbon dioxide (CO{sub 2}) and the specter of global warming have intensified research efforts to identify ways to sequester carbon. A number of novel avenues of research are being considered, including bioprocessing methods to promote and accelerate biosequestration of CO{sub 2} from the environment through the growth of organisms such as coccolithophorids, which are capable of sequestering CO{sub 2} relatively permanently. Calcium and magnesiu… more
Date: September 10, 2001
Creator: V.J. Fabry, Ph.D.
Partner: UNT Libraries Government Documents Department
open access

CALCIUM CARBONATE PRODUCTION BY COCCOLITHOPHORID ALGAE IN LONG TERM, CARBON DIOXIDE SEQUESTRATION

Description: Predictions of increasing levels of anthropogenic carbon dioxide (CO{sub 2}) and the specter of global warming have intensified research efforts to identify ways to sequester carbon. A number of novel avenues of research are being considered, including bioprocessing methods to promote and accelerate biosequestration of CO{sub 2} from the environment through the growth of organisms such as coccolithophorids, which are capable of sequestering CO{sub 2} relatively permanently. Calcium and magnesiu… more
Date: July 15, 2003
Creator: V.J. Fabry, Ph.D.
Partner: UNT Libraries Government Documents Department
open access

Carbon Dioxide Capture From Flue Gas Using Dry Regenerable Sorbents Quarterly Technical Progress Report: July-September 2002

Description: The objective of this project is to develop a simple and inexpensive process to separate CO{sub 2} as an essentially pure stream from a fossil fuel combustion system using a regenerable sorbent. The sorbents being investigated in this project are primarily alkali carbonates, and particularly sodium carbonate and potassium carbonate, which are converted to bicarbonates through reaction with carbon dioxide and water vapor. Bicarbonates are regenerated to carbonates when heated, producing a nearly… more
Date: October 1, 2002
Creator: Green, David A.; Turk, Brian S.; Portzer, Jeffrey W.; P.Gupta, Raghubir; McMichael, William J.; Liang, Ya et al.
Partner: UNT Libraries Government Documents Department
open access

Carbon Dioxide Capture from Flue Gas Using Dry Regenerable Sorbents

Description: Laboratory studies were conducted to investigate dry, regenerable, alkali carbonate-based sorbents for the capture of CO{sub 2} from power plant flue gas. Electrobalance, fixed-bed and fluid-bed reactors were used to examine both the CO{sub 2} capture and sorbent regeneration phases of the process. Sodium carbonate-based sorbents (calcined sodium bicarbonate and calcined trona) were the primary focus of the testing. Supported sodium carbonate and potassium carbonate sorbents were also tested. S… more
Date: September 30, 2004
Creator: Green, David A.; Turk, Brian S.; Portzer, Jeffrey W.; Gupta, Raghubir P.; McMichael, William J.; Nelson, Thomas et al.
Partner: UNT Libraries Government Documents Department
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