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Carbonation of metal silicates for long-term CO2 sequestration

Patent ·
OSTI ID:1128516
; ; ;
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).
Research Organization:
ORNL (Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States))
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725
Assignee:
UT-Battelle, LLC (Oak Ridge, TN); University of Tennessee Research Foundation (Knoxville, TN); Virginia Museum of Natural History (Martinsville, VA)
Patent Number(s):
8,673,256
Application Number:
13/361,215
OSTI ID:
1128516
Country of Publication:
United States
Language:
English

References (12)

CO2 disposal by means of silicates journal June 1990
Absorption and fixation of carbon dioxide by rock weathering journal January 1997
Magnesium Hydroxide Dehydroxylation/Carbonation Reaction Processes: Implications for Carbon Dioxide Mineral Sequestration journal April 2002
A Program to Develop CO2 Sequestration Via Mineral Carbonation book January 2003
Feasibility of CO2 Fixation via Artificial Rock Weathering journal September 2001
A Guide to CO2 Sequestration journal June 2003
Carbon dioxide sequestration as stable carbonate minerals – environmental barriers journal August 2001
A new CO2 disposal process via artificial weathering of calcium silicate accelerated by acetic acid journal April 2001
Mitigation of CO2 by Chemical Conversion:  Plausible Chemical Reactions and Promising Products journal March 1996
Progress on binding CO2 in mineral substrates journal January 1997
Mineral Carbonation and ZECA book January 2003
Carbon dioxide disposal in carbonate minerals journal January 1995

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