Fig. 4: Gas separation performance and molecular dynamics simulations of the fabricated BNG heterostructured membrane (FBN:chitosan = 7:10).
From: Pyro-layered heterostructured nanosheet membrane for hydrogen separation
a Single gas permeability of the BNG membrane as a function of the gas kinetic diameter at 25 °C. The inset represents the ideal selectivity of hydrogen to other gases. b The H2/CO2 separation performance of our BNG membranes compared with other molecular sieving membranes. The black line indicates the 2008 Robeson upper bound of polymeric membranes6, and the burgundy dashed line indicates the 2017 upper bound of the best current membranes for H2/CO2 separation. The gas separation performance of the literature data is provided in Supplementary Table 2. c The dependence of gas flux and H2/CO2 selectivity on the slit width relative to the shortest dimension of CO2. Inset, the illustration of shortest dimension measurement. d A zoomed-in view of gas flux and selectivity for the slit with a width approaching the shortest dimension of CO2.
