Contribution of pore-connectivity to permeation performance of silicalite-1 membrane; part ii, diffusivity of c6 hydrocarbon in micropore

Motomu Sakai, Yukichi Sasaki, Takuya Kaneko, Masahiko Matsukata

Research output: Contribution to journalArticlepeer-review

Abstract

This study investigated the permeation behaviors of n-hexane and 2-methylpentane through two-types of silicalite-1 membranes that have different pore-connectivity. The permeation mechanisms of these hydrocarbons were able to be explained by the adsorption–diffusion model. In addition, the fluxes through silicalite-1 membranes could be expressed by the modified Fick’s first law. The hydrocarbon fluxes through S-1S with better pore-connectivity were ca. 3–20 times larger than those through S-1M with poor pore-connectivity. For these membranes with different pore-connectivity, the activation energy of diffusion of n-hexane was 17.5 kJ mol−1 for the membrane with better pore-connectivity and 18.0 kJ mol−1 for the membrane with poorer pore-connectivity, whereas for 2-methylpentane it was 17.9 and 33.0 kJ mol−1, respectively. We concluded that the pore-connectivity in silicalite-1 membrane significantly influences the molecular diffusivities.

Original languageEnglish
Article number399
JournalMembranes
Volume11
Issue number6
DOIs
Publication statusPublished - 2021 Jun

Keywords

  • Adsorption
  • Connectivity
  • Diffusion
  • Membrane
  • Micropore
  • Separation
  • Silicalite-1

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Process Chemistry and Technology
  • Filtration and Separation

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