Global to push GA events into
skip to main content

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).
; ; ;
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

Works referenced in this record:

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