4. Mapping: water, O2 and CO2 transfers

4.1 Water and oxygen models

Water and O ₂ are commonly used as model permeates as a polar molecule (water) and an apolar molecule (O ₂ ) to cover systems on a broad polarity scale. The values in the table 2 are not always easy to compare. It is then customary to map the permeability coefficients of these two so-called model species (water and O ₂ ), to represent the polar and apolar molecules transported. These two gases are often considered...