Transcript Carbon Capture Technology - Eastern Connecticut State

Carbon Dioxide Emission:
24 billion tons per year
CARBON CAPTURE AND STORAGE
Carbon capture and storage is mostly used to
describe methods for removing CO2 emissions
from large stationary sources, such as
electricity generation and some industrial
processes, and storing it away from the
atmosphere.
Carbon Capture Technology
•Post- combustion capture
•React the flue gas with chemicals that absorb CO2 and then heat the
chemicals to release CO2.
•NOTE:
Flue gas : Mixture of nitrogen , water vapor and 15 % of Carbon dioxide
Carbon Capture Technology
• Oxy-fuel combustion
–
Use pure oxygen to support the fossil fuel combustion. The flue gas is
then mostly CO2 and water making it to separate easily.
Carbon Capture Technology
Pre- combustion capture
Remove carbon before combustion. By gasifying the coal through the
reaction with more oxygen, it is possible to a mix of mostly CO2 and
hydrogen.
Transportation
• Many point sources of captured CO2 would
not be close to geological or oceanic storage
facilities. In these cases, transportation would
be required.
• The main form of transportation
– pipeline.
– Shipping
Carbon Storage technology
•Geological storage
•Oceanic storage
Geological storage
Oceanic Storage
Two storage mechanism has been proposed
– Dissolving CO2 at mid-depth.
– Injecting the CO2 at depths in excess of 3 km , where it
would form lakes of liquid CO2 . Bellow 3 km liquid CO2
would be denser than sea water and would sink to
the ocean floor.
Monitoring
• Geochemical Monitoring
• Seismic Monitoring
• Non-Seismic Monitoring
What might Carbon Capture and
Storage look like?
The diagram is from a BP news
release from the abandoned Miller
project, UK North Sea, which is no
longer available online.
Carbon Storage Concerns
• CCS technologies actually require a lot of energy to
implement and run
• transporting captured CO2 by truck or ship, require
fuel.
• Creating a CCS-enabled power plant also requires a
lot of money.
• What happens if the carbon dioxide leaks out
underground? We can't really answer this question. Because the process is so new, we
don't know its long-term effects. Slow leakage would lead to climate changing. Sudden catastrophic
leakage is dangerous, and causes asphyxiation.
• The more CO2 an ocean surface absorbs, the more
acidic it becomes, higher water acidity adversely
affects marine life.
FutureGen
FutureGen is a public-private partnership to build a first-of-its-kind coal-fueled, near-zero
emissions power plant. It will use cutting-edge technologies to generate electricity while capturing
and permanently storing carbon dioxide deep beneath the earth. The plant will also produce
hydrogen and byproducts for possible use by other
Where are the proposed CCS
projects?
• http://www.geos.ed.ac.uk/sccs/storage/storag
eSites.html
• More links
• http://network.carboncapturejournal.com/vid
eo/2018151:Video:4342
• http://www.futuregenalliance.org/about.stm