Reprint of: An experimental study of micropore defects in MFI membranes

- MFI membranes were minutely examined by adsorption-branch permporometry.
- For the first time, micropore defects could be directly verified by SEM.
- The micropore defects were most likely open grain boundaries.
- The permporometry results correlated well with permeation and separation data.
- The results were also supported by nitrogen adsorption data for powders.