Technologies that capture and store the carbon dioxide from flue gases are considered to be the most cost effective means of reducing the carbon dioxide content in the environment. A major concern blocking the continuous use of available processes to remove carbon dioxide from flue gases is the extensive corrosion of the equipment and high energy requirements for regeneration. Graphene, i.e., single-layer graphite, has high surface area and shows great promise for carbon dioxide adsorption, similar to prior work on carbon naotubes. Graphene based nano-materials can be tailored to have high surface area, high conductivity and also high mechanical strength, making them ideal materials for the use as adsorbents. The conductive property of this material, which leads to the increase of surface temperature of the material, could be used as a method for desorption of contaminants. The objective of this study was to investigate and compare the carbon dioxide adsorption capacity of graphene and reduced graphene oxide at room temperature and moderate pressure for practical application in carbon capture technologies. We also report for the first time on the electrical current stimulated desorption of adsorbed gases from graphene surfaces. Graphene and reduced graphene oxide show a high adsorption capacity for carbon dioxide over three cycles of adsorption and electrical current stimulated desorption. The adsorption capacity of graphene and reduced graphene oxide for carbon dioxide was found to be 1.7 and 2.03 g(CO2) g-1(adsorbate).

Electrical current stimulated desorption of carbon dioxide adsorbed on graphene

248th National Meeting (2014)

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