A diagram of the measurements for methanol permeability is shown in Fig. 3. The methanol permeability of membranes was measured using H type glassware. Methanol aq. was placed on the left and pure water was placed on the right. These solutions were separated by a PEM. The methanol permeability rate (Pm) was calculated by methanol concentrations at a set time on the right that was originally filled with pure water. There is an example of the relationship between the time and methanol concentrations on the right in Fig. 4. The methanol permeability rate was calculated as the slope of an approximate line. Because the membranes were not exactly the same thickness, the methanol permeability coefficient was normalized by multiplying the methanol permeability rate by the thickness of the membrane.