Skip to Content
Find More Like This
Return to Search

Carbonation of metal silicates for long-term CO2 sequestration

United States Patent Application

20040213705
A1
View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
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).
Blencoe, James G. (Harriman, TN), Palmer, Donald A. (Oliver Springs, TN), Anovitz, Lawrence M. (Knoxville, TN), Beard, James S. (Martinsville, VA)
10/ 706,583
November 12, 2003
[0002] The United States Government has rights in this invention pursuant to Contract No. DE-AC05-000R22725 between the United States Department of Energy and UT-Battelle, LLC.