Membranes Filled with Activated Carbons or CMSs

1 Membranes Filled with Activated Carbons or CMSs 

Arrson et al. fabricated a MMM that corrsists of acrylonitrile-butadiene styrene (ABS) copolymer as the polymer nratrix arrd activated carbon (AC) as the inorganic filler for CO CYi separation [19]. As the fillers, two different kinds of activated carbonACl and AC2 were rrsed. As Fig. 8.50showsACl has a micropore stmeture 

From Table 8.14 it is clear that both permeability and selectivity increase with an increase in the amount of AC in the membrane Furthermore, the incorporation of ACl produces more effective results than the incorporation of ACl. 

Although carbon molecular sieves (CMSs) and zeolites offer very attractive permeation properties and the selectivites are significantly higher than that of polymeric materials, processing challenges and high costs are still hindering their industrial applications. 

In Vu et al. s work, the CMSMs were laboratory made by the high temperature pyrolysis of the PI, Matrimid 5218. The polymer solution (Matrimid 5218 5-10 wt% in dichloromethane) was cast into a film on a glass surface either by pouring the solution into a circular metal ring or with a uniform thickness film applicator. The film thickness was 2 mils. To remove the residual solvent the film was heated at 100 °C in a vacuum oven. The polymer film was then pyrolysed in a quartz tube furnace. The detailed deseription of the pyrolysis proeeduie is given elsewhere [21,22]. After the pyrolysis the membranes were subjeeted to permeation experiments. 

---