CO₂ Stripping from Monoethanolamine through a Polypropylene/CH₃SiO₂ Composite Hollow‐Fiber Membrane Contactor

Abstract

To remove CO 2 through a membrane contactor system, composite polypropylene (PP) hollow-fiber membranes were fabricated by dispersing methyl-grafted silica nanoparticles in a PP membrane matrix. A set of characterization tests including FTIR spectroscopy, FESEM, AFM, TEM, porosity, contact angle, mechanical strength, and CO 2 stripping experiments was carried out. The results showed that the porosity, hydrophobicity, roughness, and CO 2 stripping flux of the composite membranes increased with increasing content of inorganic NPs. At an absorbent flow rate of 2.5 m s -1 , the CO 2 stripping flux of composite membranes containing 1.5 wt % NPs was higher than those of most other hydrophobic membrane contactors.

Computational Fluid Dynamics Simulation of a Membrane Contactor for CO2 Separation: Two Types of Membrane Evaluation

“…Choosing the hollow-fiber membrane and absorbent solution are the most important parameters that can specify the efficiency of the HFMC process. Different kinds of liquids in various HFMCs were examined, but the membranes with higher hydrophobicity like polypropylene (PP) and the solution with lower membrane wettability like monoethanolamine (MEA) are more appreciated [51][52][53][54][55][56][57]. Kreulen et al [58] studied the absorption of CO 2 into water-glycerol mixtures using PP hollow fibers.…”

Surface modification of polypropylene hollow fiber membranes using fluorosilane for CO2 absorption in a gas-liquid membrane contactor

“…Compared with other polymers, polypropylene (PP) has the advantages of improved hydrophobicity, high chemical stability, and good mechanical strength. In addition, PP has been widely used as a membrane material for HFMC particularly because of its low cost [ [14] , [15] , [16] , [17] ]. PP costs 36 times lower than polyvinylidene fluoride (PVDF), which possesses superior physical properties, thus making PP relatively advantageous for commercialization [ 18 ].…”