Carbonation of metal silicates for long-term CO.sub.2 sequestration

Blencoe, James G; Palmer, Donald A; Anovitz, Lawrence M; Beard, James S

Title: Carbonation of metal silicates for long-term CO.sub.2 sequestration

Patent · Tue Feb 14 00:00:00 EST 2012

OSTI ID:1036993

Blencoe, James G ^[1]; Palmer, Donald A ^[2]; Anovitz, Lawrence M ^[3]; Beard, James S ^[4]

Harriman, TN
Oliver Springs, TN
Knoxville, TN
Martinsville, VA

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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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-000R22725

Assignee:: U.T. Battelle, LLC. (Oak Ridge, TN); University of Tennessee Research Foundation (Knoxville, TN); Virginia Museum of Natrual History Foundation (Martinsville, VA)

Patent Number(s):: 8,114,374

Application Number:: 12/016,098

OSTI ID:: 1036993

Country of Publication:: United States

Language:: English

References (15)

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