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Study shows economic feasibility for capturing carbon dioxide directly from the air
Date:7/24/2012

e coated with dry amino-modified silica material to capture the CO2, then flowing steam through the structure to release the gas. The technique could produce carbon dioxide that is roughly 90 percent pure.

"The technical challenges are similar to those of flue gas capture: demonstration at scale, demonstration of long-term adsorbent stability and demonstration of process feasibility and stability," Jones said. "Increased funding for air capture work is needed, because most of the funding invested in carbon capture over the past decade has been directed at flue gas capture."

Sholl and Jones have also been contributing to work on flue gas treatment, conducting research into adsorbent materials, including theoretical and experimental research into adsorbent alternatives such as metal-organic framework (MOF) materials.

Among their recent papers on direct capture of CO2 from the air are:

  • A Journal of the American Chemical Society paper that described the role of zirconium in producing more efficient amine-based adsorbents. "Past work has focused on maximizing the amount of CO2 captured per gram of adsorbent by adding ever-increasing amounts of amines," Jones explained. "We are the first to show that an alternate strategy is to change the oxide support that the amines lay on, and for a fixed amount of amine, each amine works more efficiently."

  • A paper published in ChemSusChem describing the role played by primary, secondary and tertiary amines in capturing carbon dioxide from ultra-dilute gases like air. "We showed conclusively that primary amines are responsible for CO2 capture from the air, that secondary amines work to some degree, and that tertiary amines don't absorb from air in any appreciable amount," Jones said.

  • A paper in Industrial & Engineering Chemistry Research that describes detailed cost estimates for the air capture process.

Jones believes air capture s
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Contact: John Toon
jtoon@gatech.edu
404-894-6986
Georgia Institute of Technology Research News
Source:Eurekalert  

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