Modérateurs : Rod, Modérateurs
euh, jc, tu es vraiment sur? vu ce que l'hydrogène et l'oxygène font ensemble d'habitude, ça me surprend beaucoup!!!jc a écrit :CO2 + 2(H2) -> CH4 + O2, sur catalyseur Nickel porté à 350°C. Réaction bien connue en techniques chromatographiques.Glycogène a écrit :Je ne sais plus comment ça s'appelle, mais c'est tout simplement la réaction de réduction du CO2 et H2O en méthane et O2. Moyennant beaucoup de pression et 500°C je crois, ça marche.
World’s Largest Carbon Sequestration Project Approved
15 October 2006 by Jack Rosebro
The two phases of the Mongstad CCS project.
Marking the removal of the final bureaucratic barrier to the construction of the world’s largest full-scale CO2 capture-and-storage (CCS) facility, Norway’s Ministry of the Environment has issued a carbon dioxide emission permit to Norwegian energy company Statoil ASA in conjunction with its planned co-generation plant in Mongstad.
http://www.statoil.com/statoilcom/SVG00 ... 050020CED4Carbon management will be developed in two stages, starting with a capture facility providing an annual capacity of 100,000 tonnes. This will be followed by a large-scale installation.
Statoil is due to draw up plans by 2008 for managing the major carbon emissions from Mongstad, with an investment decision for a large-scale capture plant expected to be possible by 2012.
“Technology for managing carbon dioxide is important for us,” notes Mr Jacobsen. “A series of projects has made us a pioneer for such projects.
“These include the Sleipner area in the North Sea, Algeria’s In Salah field, the Snøhvit development in the Barents Sea and the Halten carbon dioxide venture in the Norwegian Sea with Shell.
“Developing new capture solutions for Mongstad will confirm our position as an international leader for carbon management.”
http://www.statoil.com/STATOILCOM/snohv ... 45003EF89DStorage deep beneath the seabed
Instead of being released into the atmosphere, the carbon dioxide produced with the gas on the Snøhvit field is to be stored 2,600 metres beneath the seabed at the edge of the reservoir. A total of 700,000 tonnes will be stored annually, which is equivalent to emissions from 280,000 cars.
. personne de sérieux ne doute que le pic arrivera un jourEnvironnement2100 a écrit :Le graphe ci-dessous montre que ces corridors poussiéreux doivent cacher quelques peakistes activistes :
disons que l'éventail des dates varie de 2006 à 2030, les prédictions que tu montres sont autour de 2020 donc "moyennement optimistes".
Je suis tout à fait d'accord avec toi.n.g a écrit :Je me répète un peu, mais j'ai l'impression que l'humification des sols agricoles, par rapport aux différentes techniques sus-mentionnées, est préférable en termes de rapidité de mise en oeuvre, de coût, de capacités de séquestration et de stabilité physico-chimique du carbone séquestré. Qu'en pensez-vous?
"ZeroGen would be the first power generation project in the world to combine this sequestration with coal-based gasification, making it an initiative of national and international importance.
"Coal gasification is the cleanest method for converting coal’s energy potential into electricity."
The power plant is proposed to be built in Rockhampton.
If the drilling results are as expected, construction is due to start in the second quarter of 2008, with completion due in 2010.
Tout est dans le conditionnelGillesH38 a écrit :Un exemple : l'indexation du prix du gaz sur celui du pétrole découragerait
. Exemples de sites de stockage géologique
Gaz de France participe au projet européen CASTOR (CO2 from Capture to Storage), directement ou par l'intermédiaire de ses filiales. Le Groupe contribue ainsi à l'étude de plusieurs cas de stockages géologiques.
K12B (mer du Nord hollandaise) : le CO2 émis par l'exploitation de ce gisement off-shore est directement réinjecté dans le sous-sol du site. Ce gisement est exploité par Proned, filiale de Gaz de France.
Snohvit (Norvège) : sur le gisement de gaz naturel off-shore de Snohvit (dont Gaz de France détient une participation de 12 %), le CO2 est séparé du gaz extrait et réinjecté dans le sous-sol sur le site.
Casablanca (Maroc) : ce gisement de pétrole off-shore n'est plus exploité. Du CO2 d'origine industrielle y est injecté pour être stocké.
Lindach (Autriche) : le gisement de gaz on-shore de Lindach est situé à 500 m de profondeur. Il reçoit du CO2 d'origine industrielle qui y est stocké.
Nov. 11, 2006, 10:10PM
New Zealand sites sought for carbon dioxide storage
No. 1 coal miner wants to develop synthetic fuels
By GAVIN EVANS
Bloomberg News
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Solid Energy New Zealand Ltd., the country's biggest coal miner, is looking for underground sites to store carbon dioxide as part of a plan to develop a $670 million synthetic fuel plant.
The government-owned miner will spend the next six months assessing potential locations in Otago and Southland on the country's South Island, Chief Executive Officer Don Elder said.
The region holds about three-quarters of the nation's coal, and is where the company is considering building a coal-to-liquid fuels plant to utilize local lignite reserves.
``If we are to exploit our huge lignite reserves, we must work to address the challenge of CO2,'' Elder said in a prepared statement.
New Zealand, a nation of 4.1 million people, has more than 10 billion tons of economically recoverable coal, a per-person rate 15 times the world average. It is also a signatory to the United Nations' Kyoto Protocol on climate change.
Burning or processing coal produces almost twice as much carbon dioxide and other gases blamed for climate change as natural gas.
Unless those emissions can be reduced, New Zealand regulators are unlikely to approve the proposed fuel plant or coal-fired power stations Solid Energy and government-owned generator Mighty River Power Ltd. are considering.
Carbon dioxide injection is already used widely in oil and gas production. Follow-up drilling in Southland during the next two years will enable the company to select the optimal site for injection in terms of geology and cost, Elder said.
Solid Energy is still studying the product options for the Southland fuel plant, and may be as much as six years from a final investment decision, Elder said in an interview.
While transport fuel is likely to be part of the mix, the company needs to decide whether there would also be a market for the electricity, methanol, ammonia-urea or dimethyl ether such a plant could also produce, he said.
The more transport fuel that is made, the more coal that will be needed and the more carbon dioxide must be stored, he said.
Christchurch-based Solid Energy has spent about $3.3 million a year the past two years on research to reduce carbon emissions or capture and store them.
C'est effectivement CO2 + 4(H2) -> CH4 + 2(H2O). Merci pour ta vigilance.