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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Abstract

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.
Original languageEnglish
Pages (from-to)15119–15124
Number of pages6
JournalACS Omega
Volume3
Issue number11
DOIs
Publication statusPublished - 2018
Externally publishedYes

Keywords

  • adsorptie
  • koolstof
  • poreusheid
  • poreuze materialen
  • tweedimensionale materialen

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