Mineral carbonation of CO2
Mineral carbonation of CO2
A survey of the global carbon reservoirs suggests that the most stable, long-term storage mechanism for atmospheric CO2 is the formation of carbonate minerals such as calcite, dolomite and magnesite. The feasibility is demonstrated by the proportion of terrestrial carbon bound in these minerals: at least 40,000 times more carbon is present in carbonate rocks than in the atmosphere. Atmospheric carbon can be transformed into carbonate minerals either ex situ, as part of an industrial process, or in situ, by injection into geological formations where the elements required for carbonate-mineral formation are present. Many challenges in mineral carbonation remain to be resolved. They include overcoming the slow kinetics of mineral-fluid reactions, dealing with the large volume of source material required and reducing the energy needed to hasten the carbonation process. To address these challenges, several pilot studies have been launched, including the CarbFix program in Iceland. The aim of CarbFix is to inject CO2 into permeable basaltic rocks in an attempt to form carbonate minerals directly through a coupled dissolution-precipitation process.
CO2 sequestration, mineral carbonation, mineralogic storgae, basalt carbonation
333-337
Oelkers, Eric H.
3cf51d71-be44-4bed-803e-3b240bdb147b
Gislason, Sigurdur R.
031aa1d2-b345-4e99-9e15-c73f29215e19
Matter, Juerg
abb60c24-b6cb-4d1a-a108-6fc51ee20395
October 2008
Oelkers, Eric H.
3cf51d71-be44-4bed-803e-3b240bdb147b
Gislason, Sigurdur R.
031aa1d2-b345-4e99-9e15-c73f29215e19
Matter, Juerg
abb60c24-b6cb-4d1a-a108-6fc51ee20395
Abstract
A survey of the global carbon reservoirs suggests that the most stable, long-term storage mechanism for atmospheric CO2 is the formation of carbonate minerals such as calcite, dolomite and magnesite. The feasibility is demonstrated by the proportion of terrestrial carbon bound in these minerals: at least 40,000 times more carbon is present in carbonate rocks than in the atmosphere. Atmospheric carbon can be transformed into carbonate minerals either ex situ, as part of an industrial process, or in situ, by injection into geological formations where the elements required for carbonate-mineral formation are present. Many challenges in mineral carbonation remain to be resolved. They include overcoming the slow kinetics of mineral-fluid reactions, dealing with the large volume of source material required and reducing the energy needed to hasten the carbonation process. To address these challenges, several pilot studies have been launched, including the CarbFix program in Iceland. The aim of CarbFix is to inject CO2 into permeable basaltic rocks in an attempt to form carbonate minerals directly through a coupled dissolution-precipitation process.
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Published date: October 2008
Keywords:
CO2 sequestration, mineral carbonation, mineralogic storgae, basalt carbonation
Organisations:
Ocean and Earth Science
Identifiers
Local EPrints ID: 349453
URI: http://eprints.soton.ac.uk/id/eprint/349453
ISSN: 1811-5209
PURE UUID: 35d323f0-8bab-417c-8376-1ba468272451
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Date deposited: 05 Mar 2013 11:25
Last modified: 15 Mar 2024 03:45
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Author:
Eric H. Oelkers
Author:
Sigurdur R. Gislason
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