Graphdiyne based membranes: exceptional performances for helium separation applications

Abstract

Graphdiyne is a novel two-dimensional material deriving from graphene that has been recently synthesized and featuring uniformly distributed sub-nanometer pores. We report accurate calculations showing that graphdiyne pores permit an almost unimpeded helium transport which can be used for its chemical and isotopic separation. Exceptionally high He/CH_4 selectivities are found which largely exceed the performance of the best membranes used to date for extraction from natural gas. Moreover, by exploiting slight differences in the tunneling probabilities of ^3He and ^4He, we also find promising results for the separation of the Fermionic isotope at low temperature.

References in corpus (2)

• Electron beam nanosculpting of suspended graphene sheets
• The penetration barrier of water through graphynes' pores: first-principles predictions and force field optimization

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• Three-Dimensional Wave Packet Approach for the Quantum Transport of Atoms through Nanoporous Membranes
• Isotopic Separation of Helium through Nanoporous Graphene Membranes: A Ring Polymer Molecular Dynamics Study
• Helium Isotopes Quantum Sieving Through Graphtriyne Membranes
• Enhanced quantum transport in bilayer two-dimensional materials
• Modeling of Light Gases Purification and Carbon Dioxide Capture by 1B-3N and 1N-3B Defects