High Pressure CO2 Sorption on Porous Carbons

Nanoporous carbons are candidates for applications such as carbon capture and sequestration due to their large micro- and mesopore volumes. These nanoporous carbons can be optimized for use in gas storage applications by measuring their CO2 uptake at the high pressures and temperatures that mirror the eventual gas storage application. In addition, heat of adsorption can be readily calculated from high pressure isotherms. CO2 high pressure sorption isotherms have been measured on a series of nanoporous carbons and the results are discussed.


Nanoporous carbons are often utilized for applications such as gas storage and separations, including important carbon capture applications. Carbons have many advantages for this application, including their low cost, ready availability, stability, and the ability to tailor their porosity to removal of specific gases. Two strategies to enhance performance of these materials in the intended applications include:

  1. The addition of heteroatoms into the carbon structure
  2. The addition of mesopores into the microporous activated carbon framework to form hierarchical structures.

To study the performance of these carbons for CO2 capture, high pressure gas sorption measurements are recommended to closely mimic conditions of the application.

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