Wikipédia - Séquestration géologique du dioxyde de carbone. Un article de Wikipédia, l'encyclopédie libre. Le stockage géologique (ou confinement) du dioxyde de carbone est envisagé comme une des formes possibles de traitement du carbone récupéré dans les processus expérimentaux de captage et de stockage du dioxyde de carbone (CCS pour les anglophones), à but de séquestration du carbone (ou du dioxyde de carbone), pour limiter la contribution de ce gaz à l'acidification des milieux et aux modifications climatiques dont il est une des causes. Il fait l'objet d'un nombre croissant de projets internationaux, soutenu par les groupes pétroliers et certains États, avec quelques applications expérimentales.
Enjeux[modifier | modifier le code] Les forêts (relictuelles, secondaires ou cultivées) ou les tourbières et les puits océaniques de carbone ne suffisent plus à absorber les émissions humaines de CO2. Principes de la séquestration[modifier | modifier le code] Captage du CO2[modifier | modifier le code] Transport[modifier | modifier le code] Piegeage-stockage-co2-greenfacts-level2.pdf (Objet application/pdf) Scientific Facts on CO2 Capture and Storage. Home » CO2 Capture & Storage » Level 1 Context - Carbon dioxide (CO2) is a major greenhouse gas that contributes to Earth’s global warming. Over the past two centuries, its concentration in the atmosphere has greatly increased, mainly because of human activities such as fossil fuel burning. One possible option for reducing CO2 emissions is to store it underground.
This technique is called Carbon dioxide Capture and Storage (CCS). How does it work? This Digest is a faithful summary of the leading scientific consensus report produced in 2005 by the Intergovernmental Panel on Climate Change (IPCC): "Special Report on Carbon Dioxide Capture and Storage: Technical Summary" Learn more... Source document:IPCC (2005)Summary & Details: GreenFacts 1. 1.1 Carbon dioxide (CO2) is a greenhouse gas that occurs naturally in the atmosphere.
One technique that could limit CO2 emissions from human activities into the atmosphere is Carbon dioxide Capture and Storage (CCS). 2. 3. 4. 5. 6. 7. 8. 9. 10. CO2 storage: do impurities matter? | Global CCS Institute. ID_0309_callas_galharret_loisel.pdf (Objet application/pdf) Srccs_spm_ts_fr.pdf (Objet application/pdf)
Carbon Capture and Storage: From Demonstration to Deployment. Carbon capture and storage. Schematic showing both terrestrial and geological sequestration of carbon dioxide emissions from a coal-fired plant An integrated pilot-scale CCS power plant was to begin operating in September 2008 in the eastern German power plant Schwarze Pumpe run by utility Vattenfall, in the hope of answering questions about technological feasibility and economic efficiency. CCS applied to a modern conventional power plant could reduce CO2 emissions to the atmosphere by approximately 80–90% compared to a plant without CCS.[4] The IPCC estimates that the economic potential of CCS could be between 10% and 55% of the total carbon mitigation effort until year 2100.[4] Storage of the CO2 is envisaged either in deep geological formations, or in the form of mineral carbonates.
Deep ocean storage is no longer considered feasible because it greatly increases the problem of ocean acidification.[6] Geological formations are currently considered the most promising sequestration sites. Capture[edit]