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Title: Carbonation of metal silicates for long-term CO2 sequestration

In a preferred embodiment, the invention relates to a process of sequestering carbon dioxide. The process comprises the steps of: (a) reacting a metal silicate with a caustic alkali-metal hydroxide to produce a hydroxide of the metal formerly contained in the silicate; (b) reacting carbon dioxide with at least one of a caustic alkali-metal hydroxide and an alkali-metal silicate to produce at least one of an alkali-metal carbonate and an alkali-metal bicarbonate; and (c) reacting the metal hydroxide product of step (a) with at least one of the alkali-metal carbonate and the alkali-metal bicarbonate produced in step (b) to produce a carbonate of the metal formerly contained in the metal silicate of step (a).
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Issue Date:
OSTI Identifier:
UT-Battelle, LLC (Oak Ridge, TN); University of Tennessee Research Foundation (Knoxville, TN); Virginia Museum of Natural History (Martinsville, VA) ORNL
Patent Number(s):
Application Number:
Contract Number:
Research Org:
ORNL (Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States))
Sponsoring Org:
Country of Publication:
United States

Other works cited in this record:

Process of separating the constituents of mineral silicates
patent, May 1924

Process for the manufacture of magnesium products
patent, March 1953

Method for continuous digestion of aluminous ore
patent, December 1963

Process for beneficiation of titaniferous ores
patent, October 1972

Process for producing hydrates of calcium-magnesium silicates
patent, November 1973

Recovery of magnesium from magnesium silicates
patent, November 1978

Production of magnesium oxide from magnesium silicates by basic extraction of silica
patent, October 1984

Carbonation of metal silicates for long-term CO2 sequestration
patent, February 2012

Progress on binding CO2 in mineral substrates
journal, January 1997
  • Lackner, Klaus S.; Butt, Darryl P.; Wendt, Christopher H.
  • Energy Conversion and Management, Vol. 38, p. S259-S264
  • DOI: 10.1016/S0196-8904(96)00279-8

Carbon dioxide sequestration as stable carbonate minerals – environmental barriers
journal, August 2001
  • Haywood, H.; Eyre, J.; Scholes, H.
  • Environmental Geology, Vol. 41, Issue 1-2, p. 11-16
  • DOI: 10.1007/s002540100372

Mitigation of CO2 by Chemical Conversion:  Plausible Chemical Reactions and Promising Products
journal, March 1996
  • Xiaoding, Xu; Moulijn, J. A.
  • Energy & Fuels, Vol. 10, Issue 2, p. 305-325
  • DOI: 10.1021/ef9501511

Magnesium Hydroxide Dehydroxylation/Carbonation Reaction Processes: Implications for Carbon Dioxide Mineral Sequestration
journal, April 2002
  • Béarat, Hamdallah; McKelvy, Michael J.; Chizmeshya, Andrew V. G.
  • Journal of the American Ceramic Society, Vol. 85, Issue 4, p. 742-748
  • DOI: 10.1111/j.1151-2916.2002.tb00166.x

Feasibility of CO2 Fixation via Artificial Rock Weathering
journal, September 2001
  • Wu, Jeffrey C.-S.; Sheen, Jenn-Der; Chen, Shyan-Yeh
  • Industrial & Engineering Chemistry Research, Vol. 40, Issue 18, p. 3902-3905
  • DOI: 10.1021/ie010222l

A new CO2 disposal process via artificial weathering of calcium silicate accelerated by acetic acid
journal, April 2001

Absorption and fixation of carbon dioxide by rock weathering
journal, January 1997

Carbon dioxide disposal in carbonate minerals
journal, January 1995

A Guide to CO2 Sequestration
journal, June 2003

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