Permanent CO2 sequestration into basalt:

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Permanent CO2 sequestration into basalt the
Hellisheidi, Iceland project
Sigurður Reynir Gíslason(1), Einar
Gunnlaugsson(2), Wallace S. Broecker(3), Eric H.
Oelkers(4), Juerg M. Matter(3), Andri
Stefánsson(1) and Grímur Björnsson(2)

• Institute of Earth Sciences, University of
  Iceland, Iceland,
• Reykjavik Energy, Iceland,
• Earth Institute, Columbia University, USA,
• CNRS, Université Paul Sabatier, France,

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CO2 fixation by photosynthesis CO2 H2O gt
CH2O O2
CO2 fixation by chemical weathering of
basalt CaAl2Si2O8 2 CO2 3H2O gt
Al2Si2O5(OH)4 Ca 2HCO3 ...gt ...
CaCO3 CO2 H2O
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PERMANENT CO2 SEQUESTRATION INTO BASALT THE
HELLISHEIDI, ICELAND PROJECT
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Groundwater
Target zone for CO2 sequestration identified at
400-800 m depth
400 kg/s of steam, gas and water from deep and
hot (gt240 C) geothermal wells
Hellisheiði geothermal power plant
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Sigfús Már Pétursson
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2006 2007
2008 2009 year
Laboratory experiments Large scale plug
experim. Field work Modelling Natural analogue
GROCC meeting
400-800 m injection Field work Modelling
Preparation Decision making Financing Licensing Ta
sks
Long-term injection Decision making CO2 strapped
from the atmosphere?
CO2 injection Decision making Build new
injection system
Background concentration study in the field
Commissioning of new power plant
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Chemical weathering of basalts
8.4 of the whole silicate surface
33 of CO2 consumption by silicates
Réunion
Dessert C. et al. 2001 EPSL Dessert et al. GCA
2004
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