Separation of water–alcohol mixtures using carbon nanotubes under an electric field

We report that Carbon nanotubes can effectively separate water–methanol mixtures under an electric field

Winarto Winarto; Eiji Yamamoto; Kenji Yasuoka

2019

Scholarcy highlights

  • Carbon nanotubes are a promising candidate for separation membranes because of their ability to transport substances at very high flow rates
  • There is a tradeoff between achieving a high selectivity using small pore sizes and the reduction of water flux
  • Using molecular dynamics simulations, we report that CNTs can effectively separate water–methanol mixtures under an electric field
  • Under an electric field and high piston pressure, CNTs allow selective water permeation while rejecting the permeation of methanol molecules. This separation effect is caused by the ordered structures of water molecules in the CNT
  • A high filtering effect is observed under the conditions of high methanol concentration in the solution or even with large-diameter CNTs up to 3.39 nm
  • Separation of water–alcohol mixtures using carbon nanotubes under an electric field

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