Journal of Membrane Science & Technology

Synthesis and characterization of high performance modified ZIF-8/Pebax 1657 mixed matrix membrane for CO2 separation

2^nd International Conference on Membrane Science and Technology

September 13-14, 2018 | London, UK

Reza Mosayebi Behbahani and Abolfazl Jomekian

Petroleum University of Technology, Iran

Scientific Tracks Abstracts: J Membr Sci Technol

Abstract:

This study includes two research works on gas permeation behavior of ZIF-8/Pebax 1657/PES multilayer mixed matrix membranes (MMMs). In the first step of the work, co-casting technique of MMM synthesis were investigated. To do this, ZIF-8 particles were synthesized at different temperatures. The resulted ZIF-8 particles were characterized by particle size analyzer, SEM, XRD, N2 adsorption and BET tests. ZIF-8/Pebax 1657 mixed matrix membranes (MMMs) were prepared by co-casting. A thin (1.6-7.1 ?m thickness) and defect free selective top layer of ZIF-8/Pebax 1657 was formed on top of polyethersulfone (PES) sub layer. The resulted MMMs with thin selective layer showed significant improvement in CO2 permeance and CO2/CH4 selectivity in both pure and mixed gas permeation tests compared with pure Pebax 1657 membrane. Remarkable permeance of 758 Barrer with CO2/CH4 selectivity of 16.1 was observed for the MMM synthesized by smallest ZIF- 8 particles (fabricated in 60�C) with about 2 ?m thickness of selective layer. In the second part of the study, dip coating method was studied on modified MMMs. To do this, Imidazolium-modified Pebax 1657 (Im-Pebax 1657) hybrid was prepared using 2-methylimidazole (MeIM) in methanol. ZIF-8 particles synthesized by different moral ratios of precursors were incorporated into the matrix of Im-Pebax 1657 for fabrication of mixed matrix membranes (MMMs) by coting method. Synthesized ZIF- 8 particles were characterized using laser particle size analyzer, SEM, XRD and N2 adsorption. SEM, DSC, FTIR and Gas permeation tests were applied for characterization and performance evaluation of MMMs. Pure gas permeation tests showed that the imidazolium-modified MMMs had better performance in separation of CO2 from CH4 and N2 compared to unmodified MMMs and neat Pebax 1657 membrane. Pure gas tests also showed that the incorporation of synthesized ZIF-8 with smaller sizes and higher surface area into the matrix of Pebax 1657 lead to enhancement in selective CO2 separation performance of MMMs. Plasticization lead to inferior CO2 separation performance of MMMs in mixed gas condition compared to pure gas test. Recent Publications: 1. Jomekian, A., Behbahani, R.M., Mohammadi, T., Kargari, A., Utilization of Pebax 1657 as structure directing agent in fabrication of ultra-porous ZIF-8, Journal of Solid State Chemistry, No. 235, pp. 212-216, 2016. 2. Jomekian, A., Behbahani, R.M., Mohammadi, T., Kargari, A., CO2/CH4 separation by high performance co-casted ZIF-8/Pebax 1657/PES mixed matrix membrane, Journal of Natural Gas Science and Engineering, No. 31, pp. 562- 574, 2016. 3. Jomekian, A., Behbahani, R.M., Mohammadi, T., Kargari, A., Innovative layer by layer and continuous growth methods for synthesis of ZIF-8 membrane on porous polymeric support using poly(ether-block-amide) as structure directing agent for gas separation, Microporous and Mesoporous Materials, Vol. 234, pp. 43??? 54, 2016. 4. Azizi, N., Mohammadi, T., Behbahani, R.M., Synthesis of a PEBAX-1074/ZnO nanocomposite membrane with improved CO2 separation performance, Journal of Energy Chemistry, in press, 2016. 5. Azizi, N., Mohammadi, T., Behbahani, R.M., Synthesis of a new nanocomposite membrane (PEBAX-1074/PEG-400/ TiO2) in order to separate CO2 from CH4, Journal of Natural Gas Science and Engineering, Vol. 37, pp. 39-51, 2017. 6. Azizi, N., Mohammadi, T., Behbahani, R.M., Comparison of permeability performance of PEBAX-1074/TiO2, PEBAX-1074/SiO2 and PEBAX-1074/Al2O3 nanocomposite membranes for CO2/CH4 separation, Chemical Engineering Research and Design, Vol. 117, pp. 177-189, 2017. 7. Jomekian, A., Behbahani, R.M., Mohammadi, T., Kargari, A., High speed spin coating in fabrication of Pebax 1657 based mixed matrix membrane filled with ultra-porous ZIF-8 particles for CO2/CH4 separation, Korean Journal of Chemical Engineering, Vol. 34(2), pp. 440-453, 2017. 8. Jomekian, A., Bazooyar, B., Behbahani, R.M., Mohammadi, T., Kargari, A., Ionic liquid-modified Pebax� 1657 membrane filled by ZIF-8 particles for separation of CO2 from CH4, N2 and H2, Journal of Membrane Science, Vol. 524, pp. 652-662, 2017. 9. Khoshkharam, A., Ghayyem, M.A., Behbahani, R.M., Laboratory investigation of carbon dioxide separation from methane using a PES/Pebax 1657 composite membrane, Petroleum Science and Technology, Vol. 35(5), pp. 471-478, 2017.

Biography :

Reza Mosayebi Behbahani is acting as an academic staff at the Petroleum University of Technology, Iran. He received his Ph.D in 2003 from University of Surrey, Guildford, UK. His main research interests are: Thermodynamics, Gas Separation Processes, Process Simulation, GTL Processes and Catalytic Reactions. He has published 15 books and 175 articles in scientific journals and national and international conference proceedings. He has acted as the Head of Gas Engineering Department for 7 years and as the Vice Chancellor in Planning of the Petroleum University of Technology for 4 years. Currently, he is the Editor-in-Chief of the Iranian Journal of Gas Engineering.

E-mail: r_behbahani@yahoo.com