Air separation by facilitated transport of oxygen through a Pebax membrane incorporated with a cobalt complex

Abstract

Separation of air to produce enriched oxygen (O2) and nitrogen (N2) has been of great importance in the chemical industry.

Pebax membrane for CO2/CH4 separation: Effects of various solvents on morphology and performance

“…Membranes prepared with different solvents were characterized by FTIR spectroscopy. As shown in Figure , the FTIR spectra for all of the membranes were the same; this indicated that during the preparation procedure, casting, and drying, no chemical reaction or polymer decomposition occurred, and the characteristic peaks of the polymer were in good agreement with the standard spectra in the literature . The string stretching vibrations at 1110 cm −1 correlated with the CO bond, and the peaks detected at 1637 and 1658 cm −1 were due to the stretching frequency of the HNCO and amide CO groups, respectively.…”

“…As polyamide blocks tend to form strong hydrogen bonds, the polymer chains get closer together, and a semicrystalline structure is formed. Polyether blocks form a similar structure as well during the cooling of the polymer and the evaporation of the solvent because they attain lower energy levels . Between totally crystalline and totally amorphous structures, there are various possible morphologies, and their formation depends on different parameters, such as the solvent evaporation rate, differences between the solvent boiling point and polymer solution casting temperature, polymer molecular weight, and operating temperature.…”

Elucidation on the Effect of Operating Temperature to the Transport Properties of Polymeric Membrane Using Molecular Simulation Tool

“…In Einstein correlation, he related the self-diffusion coefficient of gas particles i, D i to the mean square displacement (MSD) as a function of observation time, such as that presented in (1), through the assumption of particle random walk [25].…”

Pebax/MWCNTs‐NH2 mixed matrix membranes for enhanced CO2/N2 separation

“…The existence of nanofillers into amorphous polymer MMM can be validated by XRD of the specimen. On the other hand, polyether segments also form the same structure as they get cold or when the solvent evaporates 37 . The existence of MWCNTs‐NH 2 was ensured within a range of 2–40 of 2θ angle.…”