Structure–Function Relations for Gravimetric and Volumetric Methane Storage Capacities in Activated Carbon

Jimmy Romanos, Sara Abou Dargham, Matthew Prosniewski,, Roy Roukos, Fatima Barakat, Peter Pfeifer

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Samenvatting

The complex structure of activated carbon can be described as a three-dimensional network of graphene layers oriented in random directions. In this work, we propose a new model of the microporous structure, taking into account the degree of activation. We derive a structural relation between porosity, skeletal density, specific surface area, and the number of graphitic blocks per unit volume. In addition, we present a new approach to evaluate the interdependency between porosity and specific surface area by combining high-resolution scanning transmission electron microscopy and subcritical nitrogen adsorption. Finally, we propose a structural metric that predicts the relation between the volumetric storage capacity and the gravimetric storage capacity of supercritical methane at room temperature.
Originele taal-2English
Pagina's (van-tot)15119–15124
Aantal pagina's6
TijdschriftACS Omega
Volume3
Nummer van het tijdschrift11
DOI's
StatusPublished - 2018
Extern gepubliceerdJa

Keywords

  • adsorption
  • carbon
  • porosity
  • porous materials
  • two dimensional materials

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