Investigating the Permeability Properties of PVA/Pebax Nano composite Membrane with the use of Carbon Nanotube to Separate CO2 and CH4

In this research the separation of methane and carbon dioxide gases by using the Nano composite membrane including poly ether block amide and poly vinyl alcohol as polymers with multi wall carbon Nano tubes is investigated.  The results of many studies show that the combinations of polyether block amide have great efficiency in making the polymeric membranes for separating gas. However, efforts are doing to improve the permeability and selectivity of such membranes.  In this study made membrane was made by using the solution molding and combining the percentage of 80 to 20 for polyether block amide/poly vinyl alcohol and carbon Nano tube with the amount of 0.5,1 and 2 percent of weight is used. Morphology and structure of the membrane made by TGA, FE-SEM, XRD and FTIR were checked.  Measuring the amount of permeability of the built membranes was done by using constant pressure-variable volume method.Total results showed that with the increase of pressure up to 8 bars, the amount of permeability of carbon dioxide and methane gases increases and the maximum amount of permeability for carbon dioxide and methane gases respectively are 4w6 and 36.44 bar.  The amount of selectivity for binary gases of carbon dioxide- methane increases with the increase of the amount of nanoparticle and the maximum amount in membrane contains 2percent of carbon nanotube and 8bar pressure with the amount of 11.69.