Estimating pore size distributions of activated carbons via optical calorimetry

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Michelle Wöllner - , Chair of Inorganic Chemistry I, Fraunhofer Institute for Material and Beam Technology (Author)
  • Matthias Leistner - , Fraunhofer Institute for Material and Beam Technology (Author)
  • Philipp Wollmann - , Chair of Electrochemistry, Fraunhofer Institute for Material and Beam Technology (Author)
  • Matthias Benusch - , Fraunhofer Institute for Material and Beam Technology (Author)
  • Nicole Klein - , Fraunhofer Institute for Material and Beam Technology (Author)
  • Wulf Grählert - , Fraunhofer Institute for Material and Beam Technology (Author)
  • Stefan Kaskel - , Chair of Inorganic Chemistry I, Fraunhofer Institute for Material and Beam Technology (Author)

Abstract

Optical calorimetry is a powerful technique for the characterization of porous materials within only a few minutes (e.g. specific surface area, adsorption capacity). In the current work, optical calorimetry is presented to be a versatile tool for the pore size characterization of activated carbons. Therefore, measurements were performed with six different test gases (N2O, C2H6, C3H8, n-C4H10, i-C4H10, SF6) in the optical calorimeter InfraSORP at ambient conditions. By combining the results of optical calorimetric measurement for each adsorptive, a pore size distribution (PSD) can be estimated in the range of 0.4–6 nm which is in accurate accordance with the PSD of reference CO2 (273 K) and N2 (77 K) physisorption experiments. While common physisorption experiments can easily take a few days, the PSD by using the optical calorimetric screening is obtained within roughly 1 h.

Details

Original languageEnglish
Pages (from-to)313-320
Number of pages8
JournalAdsorption
Volume23
Issue number2-3
Publication statusPublished - 1 Feb 2017
Peer-reviewedYes

Keywords

Keywords

  • Activated carbon, Heat of adsorption, High-throughput screening, InfraSORP, Optical calorimetry, Pore size distribution