Efficient CH4/CO2 Gas Mixture Separation through Nanoporous Graphene Membrane Designs

We investigated the permeation and separation of the mixture of adsorptive gases CO2 and CH4 through a two-stage bilayer sub-nanometer porous graphene membrane design using molecular dynamics simulation

Naiyer Razmara; Alexsandro Kirch; Julio Romano Meneghini; Caetano Rodrigues Miranda

2021

Scholarcy highlights

  • Due to growing greenhouse gases concentrations, especially carbon dioxideand methane, global warming has recently become a major global issue
  • The first part, chamber, is the reservoir for the CH4 /CO2 gas mixture, consisting of a graphene sheet that serves as a piston and makes the gas mixture go through the first graphene membrane
  • The range of variation of parameters for pore size, the interlayer spacing, and pore offset distance has been selected according to the experimental findings in the literature review
  • We investigated the permeation and separation performance of CH4 /CO2 gas mixture crossing through a two-stage bilayer nanoporous graphene membrane using molecular dynamics simulation
  • We examined the simultaneous effect of the offset distance and interlayer spacing on the performance of two-stage bilayer NPG membrane designs
  • The results show that configurations with an interlayer distance of 12 Å have the best performance in terms of separation and CH4 /CO2 selectivity
  • We expect that by developing nanoporous graphene membrane designs, it will be possible to provide a revolutionary and high-performance membrane separation technology for gas-separation processes

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