Carbon Capture & Storage: what are the stakes?
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CO2 is considered as one of the main causes of climate change. Two thirds of CO2
emissions come from fossil fuels used for power generation or from industrial processes
as oil refineries, cement works, iron and steel production... The process of Carbon
Capture & Storage could reduce substantially these CO2 emissions in the atmosphere.
What is the status of CO2 storage?
Storage of CO2 has taken place for many years within the framework of Enhanced Oil
Recovery (EOR), but long-term CO2 storage for climate change reasons is relatively
a new concept.
Geological storage processes are under development in depleted Oil & Gas fields.
Other geological options are studied in unminable coal seams or in deep saline aquifers.
CO2 could also be stored into the deep ocean, but further research programmes are
required to provide a better understanding of this technique.
Next steps for the development of CCS are cost reduction and acceptability improvement
as a safe, reliable and long term containment of CO2. Since CO2 has been naturally
stored for geological time-scales and many of the considered reservoirs have already
stored gases and liquids for thousands of years, CCS appears to have a promising
and bright future.