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Carbon dioxide Sequestration at Power Plants

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by

Decio Ribeiro Sarmento

on 13 December 2013

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Transcript of Carbon dioxide Sequestration at Power Plants


GEOLOGIC CARBON DIOXIDE SEQUESTRATION
by Brad White, Paul Ogino, & Decio Sarmento

Unmineable coal beds
are too deep or too thin to be economically mined, but they may be useful reservoirs for carbon sequestration.
Carbon dioxide preferentially replaces methane on the coal surface when it is introduced into unmineable coal beds.
Depending on the coal rank, three to thirteen molecules of carbon dioxide are adsorbed for each molecule of methane released.
Carbon Dioxide Sequestration
Carbon sequestration applied to a modern conventional power plant, could reduce CO2 emissions to the atmosphere by approximately 80–90% compared to a plant without it.
Depleted oil and gas reservoirs are the most appealing terrestrial environments for carbon sequestration because...
...they are well understood after being extensively investigated during oil and gas production, and...
...the underground and surface infrastructure (wells and pipelines) are already in place and could be repurposed to inject the carbon dioxide.
Carbon dioxide preferentially replaces methane on the coal surface when it is introduced into unmineable coal beds.
Depending on the coal rank, three to thirteen molecules of carbon dioxide are adsorbed for each molecule of methane released.
The process of capturing waste carbon dioxide (CO2) from large point sources, such as fossil fuel power plants, transporting it to a storage site, & depositing it where it will not enter the atmosphere, normally an underground geological formation.
Applications
As a bonus, the injection of carbon dioxide into unmineable coal beds and depleted oil and gas reservoirs is a common technique to enhance petroleum recovery.
Deep saline aquifers have the largest capacity for carbon dioxide storage of any geologic formation.
Unfortunately, they are not an economically viable option at this time due to a lack of infrastructure and the large upfront cost.
Techniques
Carbon sequestration is a potential means of mitigating the contribution of fossil fuel emissions to global warming and ocean acidification.
Carbon dioxide preferentially replaces methane on the coal surface when it is introduced into unmineable coal beds.
Depending on the coal rank, three to thirteen molecules of carbon dioxide are adsorbed for each molecule of methane released.
Conclusion
The IPCC estimates that the economic potential of carbon sequestration could be between 10% and 55% of the total carbon mitigation effort until year 2100
Carbon dioxide preferentially replaces methane on the coal surface when it is introduced into unmineable coal beds.
Depending on the coal rank, three to thirteen molecules of carbon dioxide are adsorbed for each molecule of methane released.
Norway, Spain, China, Australia, Brazil, USA (Alabama & Mississippi)
The first commercial example was Weyburn in 2000
An integrated pilot-scale CS power plant began operating in September 2008 in the eastern German power plant Schwarze Pumpe run by utility Vattenfall
Carbon dioxide preferentially replaces methane on the coal surface when it is introduced into unmineable coal beds.
Depending on the coal rank, three to thirteen molecules of carbon dioxide are adsorbed for each molecule of methane released.
Operation sites
Techniques
Techniques
Applications
One of the most promising places to sequester carbon is in the oceans, which currently take up a third of the carbon dioxide emitted by human activity, roughly two billion metric tons each year
The amount of carbon dioxide that would double the load in the atmosphere would increase the concentration in the deep ocean by only two percent.
Techniques
Full transcript