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

Document Type : Research Article


1 Department of Chemical Engineering, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran

2 Department of Chemical Engineering, Faculty of Engineering and Technology, Islamic Azad University, Ayatollah Amoli Branch, Amol

3 Department of Chemical Engineering, Shahreza Branch, Islamic Azad University, esfahan, Iran

4 persian gulf university, bushehr,iran


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.


Main Subjects

[1] Robson L.M., The Upper Bound Revisited, Journal of Membrane Science., 320: 390-400 (2008).
[2]  Li B., Duan Y., Luebke D., Morreale B., Advances in CO2 Capture Technology: A Patent Review, Applied Energy., 102: 1439-1447 (2013).
[3] Powell C. E., Qiao G. G., Polymeric CO /N Gas Separation Membranes for the Capture of Carbon Dioxide From Power Plant Ue Gases, Journal of Membrane Science, 279: 1-49 (2006).
[4] Ren X., Ren J., Li H., Feng S. Deng M., Poly (Amide- -B-Ethylene Oxide) Multilayer Composite Mem-Brane for Carbon Dioxide Separation, International Journal of Greenhouse Gas Control, 8: 111-120 (2012).
[5] Abedini R., Mosayebi A., Mokhtari M., Improved CO2 Separation of Azide Cross Linked PMP Mixed Matrix Membrane Embedded by Nano CuBTC Metal Organic Framework, Process Safety and Environmental Protection, 114: 229-239 (2018).
[6] Wang S., Liu Y., Huang S., Wu H., Li Y., Tian Z., Jiang Z., Pebax-PEG-MWCNT Hybrid Membranes with Enhanced CO2 Capture Properties, Journal of Membrane Science, 460: 62–70 (2014).
[8] Saadati J., Pakizeh M., Separation of Oil/Water Emulsion Using a New PSf/Pebax/F-MWCNT Nanocomposite Membrane, Journal of the Taiwan Institute of Chemical Engineers, 71: 265–276 (2017).
[9] Azizi N., Arzani M., Mahdavi H.R.,  Mohammadi T., Synthesis and Characterization of Poly(Ether-Block-Amide) Copolymers/Multi-Walled Carbon Nanotube Nanocomposite Membranes for CO2/CH4 Separation, Korean Journal of Chemical Engineering, 34(9): 2459–2470 (2017).
[10] Kristin S., PVA/Nanocellulose Nanocomposite Membranes for CO2 Separation from Flue Gas, International Journal of Greenhouse Gas Control, 81: 93–102 (2019).
[11] Zhao D., Ren J., Wang Y., Qiu Y., Li H., Hua K., Li X, Ji J., Deng M., High CO2 Separation Performance of Pebax®/CNTs/GTA Mixed Matrix Membranes, Journal Membrane Science, 521: 104–113 (2017).
[12] Kheirtalab M., Abedini R., GhorbaniM., Investigation of Performance of Pebax / Poly(vinyl Alcohol) Blend Membrane for Carbon Dioxide Separation from Nitrogen, Journal Applied Research in Chemical – Polymer Engineering, 55-69 (2020).
[13] Zhao C., Ji L., Liu H., Hu G., Zhang Z., Yang M., Yang Z., Functionalized Carbon Nanotubes Containing Isocyanate Groups, Journal of solid state chemistry, 177: 4394-4398 (2004).
[15] Rabiee H., Ghadimi A., Mohammadi T., Gas Transport Properties of Reverse-Selective Poly(Ether-B- Amide )/[Emim][BF ] Gel Membranes for CO /Light Gases  Separation, Journal of Membrane Science., 476: 286-302 (2015).
[16] Amooghin A. E., Omidkhah M., Kargari A., The Effects of Aminosilane Grafting on Na Zeolite-Matrimid Mixed Matrix Membranes for CO /CH Separation, Journal of Membrane Science, 490: 364-379 (2015).
[17] Loloei M., Omidkhah M., Moghadassi A., AmooghinA. E., Preparation and Characterization of Matrimid Based Binary and Ternary Mixed Matrix Membranes for CO Separation, International Journal of Greenhouse Gas Control, 39: 225-235 (2015).