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Mineral processing techniques for recycling investment casting shell

Description: The Albany Research Center of the U.S. Department of Energy used materials characterization and minerals beneficiation methods to separate and beneficially modify spent investment-mold components to identify recycling opportunities and minimize environmentally sensitive wastes. The physical and chemical characteristics of the shell materials were determined and used to guide bench-scale research to separate reusable components by mineral-beneficiation techniques. Successfully concentrated shell… more
Date: January 1, 2002
Creator: Dahlin, Cheryl L.; Nilsen, David N.; Dahlin, David C.; Hunt, Alton H. & Collins, W. Keith
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Carbon dioxide sequestration by direct aqueous mineral carbonation

Description: Carbon dioxide sequestration by an ex-situ, direct aqueous mineral carbonation process has been investigated over the past two years. This process was conceived to minimize the steps in the conversion of gaseous CO2 to a stable solid. This meant combining two separate reactions, mineral dissolution and carbonate precipitation, into a single unit operation. It was recognized that the conditions favorable for one of these reactions could be detrimental to the other. However, the benefits for a co… more
Date: January 1, 2000
Creator: O'Connor, William K.; Dahlin, David C.; Nilsen, David N.; Walters, Richard P. & Turner, Paul C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Carbon dioxide sequestration by direct mineral carbonation with carbonic acid

Description: The Albany Research Center (ARC) of the U.S. Dept. of Energy (DOE) has been conducting a series of mineral carbonation tests at its Albany, Oregon, facility over the past 2 years as part of a Mineral Carbonation Study Program within the DOE. Other participants in this Program include the Los Alamos National Laboratory, Arizona State University, Science Applications International Corporation, and the DOE National Energy Technology Laboratory. The ARC tests have focused on ex-situ mineral carbona… more
Date: January 1, 2000
Creator: O'Connor, William K.; Dahlin, David C.; Nilsen, David N.; Walters, Richard P. & Turner, Paul C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Carbon Dioxide Sequestration by Direct Mineral Carbonation: Results from Recent Studies and Current Status

Description: Direct mineral carbonation has been investigated as a process to convert gaseous CO2 into a geologically stable, solid final form. The process utilizes a solution of sodium bicarbonate (NaHCO3), sodium chloride (NaCl), and water, mixed with a mineral reactant, such as olivine (Mg2SiO4) or serpentine [Mg3Si2O5(OH)4]. Carbon dioxide is dissolved into this slurry, by diffusion through the surface and gas dispersion within the aqueous phase. The process includes dissolution of the mineral and preci… more
Date: January 1, 2001
Creator: O'Connor, William K.; Dahlin, David C.; Nilsen, David N.; Rush, G.E.; Walters, Richard P. & Turner, Paul C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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CO2 storage in solid form: a study of direct mineral carbonation

Description: Direct mineral carbonation by an ex-situ process in an aqueous system has been investigated over the past two years. The process utilizes a slurry of water mixed with a magnesium silicate mineral, such as olivine [forsterite end member (Mg2SiO4)], or serpentine [Mg3Si2O5(OH)4]. This slurry is reacted with sub- or supercritical carbon dioxide (CO2) to produce magnesite (MgCO3). The CO2 is dissolved in water to form carbonic acid (H2CO3), which dissociates to H+ and HCO3-. The H+ ion hydrolyzes t… more
Date: January 1, 2000
Creator: O'Connor, William K.; Dahlin, David C.; Nilsen, David N.; Rush, G.E.; Walters, Richard P. & Turner, Paul C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A method for permanent CO2 mineral carbonation

Description: The Albany Research Center (ARC) of the U.S. Department of Energy (DOE) has been conducting research to investigate the feasibility of mineral carbonation as a method for carbon dioxide (CO2) sequestration. The research is part of a Mineral Carbonation Study Program within the Office of Fossil Energy in DOE. Other participants in this Program include DOE?s Los Alamos National Laboratory and National Energy Technology Laboratory, Arizona State University, and Science Applications International C… more
Date: January 1, 2000
Creator: Dahlin, David C.; O'Connor, William K.; Nilsen, David N.; Rush, G.E.; Walters, Richard P. & Turner, Paul C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Research status on the sequestration of carbon dioxide by direct aqueous mineral carbonation

Description: Direct aqueous mineral carbonation has been investigated as a process to convert gaseous CO2 into a geologically stable, solid final form. The process utilizes a solution of distilled water, or sodium bicarbonate (NaHCO3), sodium chloride (NaCl), and water, mixed with a mineral reactant, such as olivine (Mg2SiO4) or serpentine [Mg3Si2O5(OH)4]. Carbon dioxide is dissolved into this slurry, by diffusion through the surface and gas dispersion within the aqueous phase. The process includes dissolut… more
Date: January 1, 2001
Creator: O'Connor, William K.; Dahlin, David C.; Nilsen, David N.; Gerdemann, Stephen J.; Rush, Gilbert E.; Walters, Richard P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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