CO2 Sequestration by maclaren1

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									        CO2 Sequestration

                          by Dave Kahn
Submitted to Dr. Thomas Edgar - ChE 379
                    Outline
•   Global Warming
•   Costs
•   Technical Description
•   Leakage
•   Research Efforts
•   Conclusions
•   References
•   Questions
                   Global Warming




source: wikipedia.com
                  Global Warming




source: http://www.environment.sa.gov.au/sustainability
                 Global Warming




source: wikipedia.com
Costs

 • carbon dioxide capture
 would add 1.5 cents/kWh


 • carbon dioxide is
 already being separated
 via power station flue
 gases for applications in
 the food industry
                Technical Description




http://www.co2captureproject.org/technologies/tech_img2.gif
              Leakage
   The Frio Brine Project




source: www.greencarcongress.com
                       Leakage
•To date, no leakage has been detected

• However, the study has shown that after the
carbon dioxide is sequestered, the chemical
properties of the water and the dissolved inorganic
carbon change

• Changes include:
   •sharp drops in pH
   •pronounced increases in alkalinity
   •significant shifts in the isotopic
       compositions

•Also, it has shown that the CO2 can degrade
carbonate substances in the rock
                      Research Efforts

Project
Name       Capacity           Comments
           Initial inj.: 30
           kt/yr
K12B       2006+: 0.4         Enhanced gas recovery demo project.Total: 8 MMt
           MMt/yr
           Designed: 20
           t/d                Injection into coal seam has been more difficult
RECOPOL    Achieved: 1-       than expected.
           1.3 t/d             Horizontal wells have been drilled.
           Total: 3 Mt
           Injection rate:
           2 t/d           CO2 -ECBM test project.
Hokkaido   Total           Spring 2005 wells will be refurbished
           injected: 24 t and new more extensive CO2 injection test
                           planned.
               Conclusions

• The Earth is warming!
• CO2 capture for sequestration would add
  ~15% to untaxed energy bill
• Sequestration can increase oil recovery
  efficiency by 10-15%
• It has not yet been shown to leak
• It has however shown potential for
  leakage channeling
• Recommendations – Much more research
                        References
“CO2 Capture and Storage.” CO2 Emissions Database. IEA
      Greenhouse Gas R&D Programme. 21 Nov. 2006
      <http://www.co2captureandstorage.info/>.
“Global Warming.” Wikipedia.com. 20 Nov. 2006. 21 Nov.
      2006 <http://en.wikipedia.org/wiki/Global_warming>.
“Potential Leakage and Toxicity Problems with CO2
      Sequestration.” Green Car Congress. 31 July 2006.
      Green Car Congress. 21 Nov. 2006
      <http://www.greencarcongress.com/2006/07/potential_
      leaka.html>.
Quashning, Volker. Homepage of Dr. Volker Quashning. 21
      Dec. 2001. Plataforma Solar de Almería . 21 Nov.
      2006 <http://www.volker-quaschning.de/index.html>.
“sequestration.” Dictionary.com. 2006. 10 Nov. 2006
      <http://dictionary.reference.com/browse/sequestration>.
? Questions ?

								
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