Fig. 3: Gas-permeation performance.
From: MOF-in-COF molecular sieving membrane for selective hydrogen separation
a Home-made gas-permeation module and schematic illustrating gas transport through ZIF-67-in-TpPa-1 membrane. b Single-gas permeances of ZIF-67-in-TpPa-1 membrane as a function of kinetic diameter of permeating molecules at 298 K and 1 bar. The inset shows the mixed-gas-separation factor of ZIF-67-in-TpPa-1 membrane and TpPa-1 membrane for H2 over other gases. Long-term tests of ZIF-67-in-TpPa-1 membrane for (c) equimolar gas mixture of H2/CO2 and H2/CH4 at 298 K and 1 bar, and (d) equimolar gas mixture of H2/CO2 at 453 K (180 °C) and 1 bar. Mixed-gas selectivities of (e) H2/CO2 and (f) H2/CH4, as a function of H2 permeance for our MOF-in-COF membranes compared with literature data. Information on the data points is given in Supplementary Tables 2, 3.
