Carbon dioxide Sequestration Revisited

Artist visualization of CO2 sequestration of CO2 from a coal fired power plant into brine deep below the ground

Just read an article on Chemical and Engineering News (C&EN) that Dow Chemicals and Air Products have signed separate agreements to capture and sequester CO2 emitted from coal fired power plants in US and Germany, respectively.
Dow's proposed agreement is with Alstom for a pilot plant to be built at South Charleston W.Va. They are proposing about 1800 tons/yr of CO2 capture from the flue gases of a coal fired boiler. The removal technology here is an amine based CO2 removal post capture method.
The Air Products project is Germany is with the Swedish utility company Vattenfall AB. Sequestration options are being explored currently. More details can be found in the source article [Link]. New findings in the the sequestration of CO2 indicate that substantial amount of underground CO2 may remain dissolved in deep formation brine, rather than getting fixed into mineral carbonates, as previously believed.
Sources
C&EN
Nature

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News: Cleaner technologies for coal at Penn State

Structural representation of a South African intertinite-rich Highveld coal. Carbon atoms are green, oxygen atoms are red, and sulfur atoms yellow. Courtesy of Daniel van Niekirk / Jonathan Mathews

Research at Penn State (RPS) recently did an extensive article on current clean-coal research at Penn State. Featured were the following:

• Direct liquefaction of coal to produce jet fuels (JP-900).
  
• Better molecular models for coal, CO₂ sequestration in coal seams.
• Understanding coal reactions using femtochemistry.
• Adapting existing refineries for coal conversion.
• Making more comprehensive use of coal, producing value-added compounds.
• Molecular-basket adsorbents to capture CO₂ from flue gas streams.

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