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ORNL: Crystallization method offers new option for carbon capture from air

Posted at 12:22 pm January 9, 2017
By Oak Ridge Today Staff Leave a Comment

carbon_dioxide_direct_air_capture2-custelcean

Using X-ray diffraction, ORNL’s Radu Custelcean analyzed the molecular structure of the simple guanidine compound and was surprised to find carbonate, a crystal that forms when carbon dioxide from air reacts with water. (Image credit: ORNL/Genevieve Martin)

 

By Sara Shoemaker, Oak Ridge National Laboratory

Scientists at the U.S. Department of Energy’s Oak Ridge National Laboratory have found a simple, reliable process to capture carbon dioxide directly from ambient air, offering a new option for carbon capture and storage strategies to combat global warming.

Ambient air is air that completely surrounds.

Initially, the ORNL team was studying methods to remove environmental contaminants such as sulfate, chromate, or phosphate from water. To remove those negatively charged ions, the researchers synthesized a simple compound known as guanidine designed to bind strongly to the contaminants and form insoluble crystals that are easily separated from water.

In the process, they discovered a method to capture and release carbon dioxide that requires minimal energy and chemical input. Their results are published in the journal Angewandte Chemie International Edition. [Read more…]

Filed Under: Front Page News, Oak Ridge National Laboratory, Top Stories, U.S. Department of Energy Tagged With: Angewandte Chemie International Edition, carbon capture, carbon dioxide, carbon dioxide capture, carbonate, Charles Seipp, CO2 Capture from Ambient Air by Crystallization with a Guanidine Sorbent, direct air capture, Genevieve Martin, global warming, greenhouse gas, guanidine, Michelle Kidder, Neil Williams, Oak Ridge National Laboratory, ORNL, Radu Custelcean, Sara Shoemaker, Spallation Neutron Source, U.S. Department of Energy, University of Tennessee, University of Texas, x-ray diffraction

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