J. Water Environ. Nanotechnol., 3(1): 81-94 Winter 2018 RESEARCH ARTICLE Preparaion of Nano Pore ZSM-5 Membranes: Experimental, Modeling and Simulaion Mansoor Kazemimoghadam 1, *, Zahra Amiri Rigi 2 1 Department of Chemical Engineering, Malek-Ashtar University of Technology, Tehran, Iran 2 Department of Chemical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran Received: 2017.7.26 Accepted: 2017.11.12 Published: 2018.01.30 ABSTRACT Nano pore ZSM-5type membranes were prepared on the outer surface of a porous-mullite tube by in situ liquid phase hydrothermal synthesis. The hydrothermal crystallizaion was carried out under an autogenous pressure, at a staic condiion and at a temperature of 180 ° C with tetra propyl ammonium bromide (TPABr) as a template agent. The molar composiion of the staring gel of ZSM-5 zeolite membrane was: SiO 2 /Al 2 O 3 =100, Na 2 O/Al 2 O 3 =0.292, H 2 O/Al 2 O 3 =40–65, TPABr/ SiO 2 =0.02-0.05. The zeolites calcinaions were carried out in the air at 530 ° C, to burn of the template (TPABr) within the zeolites. X-ray difracion (XRD) paterns of the membranes consisted of peaks corresponding to the support and zeolite. The crystal species were characterized by XRD, and morphology of the supports subjected to crystallizaion was characterized by scanning electron microscopy (SEM). Performance of Nano-porous ZSM-5 membranes was studied for separaion of water–unsymmetrical dimethylhydrazine (UDMH) mixtures using pervaporaion (PV). Finally, a comprehensive unsteady- state model was developed for the pervaporaion of water-UDMH mixture by COMSOL Muliphysics sotware version 5.2. The developed model was strongly capable of predicing the efect of various dimensional factors on concentraion and velocity distribuions within the membrane module. The best ZSM-5 zeolite membranes had a water lux of 2.22 kg/m 2 .h at 27 ° C. The best PV selecivity for ZSM-5 membranes was obtained to be 55. Keywords: CFD Simulaion, Nano Pore Zeolite, Pervaporaion, Water–UDMH Separaion, Zeolite Membrane How to cite this aricle Kazemimoghadam M, Amiri Rigi Z. Preparaion of Nano Pore ZSM-5 Membranes: Experimental, Modeling and Simulaion. J. Water Environ. Nanotechnol., 2018; 3(1): 81-94. DOI: 10.22090/jwent.2018.01.008 ORIGINAL RESEARCH PAPER his work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. * Corresponding Author Email: mzkazemi@gmail.com INTRODUCTION Dehydration of organic solvents is presently the major market of PV. High separation factors and water permeate luxes are reported in previous studies on pervaporation dehydration of isopropanol, ethanol, n-butanol, n-butyl-acetate, ethylene glycol and acetic acid aqueous solution [1-4]. Uragami et al. (2015) investigated the efect of immersion time in CaCl 2 or MgCl 2 methanol solutions on the permeation lux and separation factor of pervaporation dehydration of ethanol aqueous solution using Alg-DNA/Mg 2+ membrane. heir results showed that ater immersing the membrane in methanol solution for 12 hours, the separation factor increased signiicantly, while decreased ater 12 hours [1, 2, 5-8]. Zeolite membranes are usually used in pervaporation processes due to their strong potential. hese membranes are synthesized using various techniques such as hydrothermal in-situ crystallization, chemical vapor phase technique and spray seed coating. Zeolite NaA membrane was reported to be excellent materials for solvent dehydration by PV. But under slightly severe conditions and under hydrothermal stresses, zeolite NaA membranes behaved unsuitably due to