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Thermal stability of artinite, dypingite and brugnatellite—Implications for the geosequestration of green house gases

Frost, Ray L., Bahfenne, Silmarilly, Graham, Jessica E., & Martens, Wayde N. (2008) Thermal stability of artinite, dypingite and brugnatellite—Implications for the geosequestration of green house gases. Thermochimica Acta, 475(1-2), pp. 39-43.

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Abstract

The approach to remove green house gases by pumping liquefied carbon dioxide several kilometres below the ground implies that many carbonate containing minerals will be formed. Among these minerals the formation of dypingite, artinite and if the ferric iron is present brugnatellite are possible; thus necessitating a study of the thermal stability of such minerals. The thermal stability of two carbonate bearing minerals dypingite and artinite together with brugnatellite with a hydrotalcite related formulae have been characterised by a combination of thermogravimetry and evolved gas mass spectrometry. Artinite is thermally stable up to 352 degrees Celsius. Two mass loss steps are observed at 219 and 355 degrees Celsius. Dypingite decomposes at a similar temperature but over a large number of steps. Brugnatellite shows greater stability with decomposition not occurring until after 577 degrees Celsius. The thermal decomposition of brugnatellite occurs over a number of mass decomposition steps. It is concluded that pumping liquefied green house gases into magnesium bearing mineral deposits is feasible providing a temperature of 350-355 degrees Celsius is not exceeded to prevent escape of CO2 towards the surface. In contrast, the water loss occurring at lower temperatures could have a positive effect on the geosequestration of CO2 as it probably causes a decrease in the molar volume of secondary carbonate minerals and consequently an increase in aquifer porosity.

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9 citations in Web of Science®

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ID Code: 14654
Item Type: Journal Article
Additional Information: This paper reports in part the solution to the removal of GREENHOUSE GASES.
Keywords: artinite, dypingite, brugnatellite, carbonate, thermal stability, thermogravimetry, thermal analysis, geological sequestration of CO2
DOI: 10.1016/j.tca.2008.06.007
ISSN: 0040-6031
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2008 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 02 Sep 2008
Last Modified: 29 Feb 2012 23:46

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