Coagulant Permeance (GPUa)   Selectivity   H2 CH4 H2/CH4 Deionized water 25.0 2.05 46.3 Ethanol 71.0 2.05 34.6 Methanol 217.5 8.09 26.9 Temperature: 25°C, feed pressure: 10 bar

Table 5: Gas permeance and H2/CH4 selectivity through PSf/PDMS composite membranes (different coagulants).