Preparation Of Nano Pore MOR Membranes Experimental Modeling And Simulation

Nano pore Mordenite membranes were prepared on the outer surface of ceramic tubular tubes via hydrothermal synthesis and evaluated for dehydration pervaporation of water unsymmetrical dimethyl hydrazine UDMH mixtures. Highly water-selective mordenite membranes were prepared and the optimum reaction condition was found to be 24 h crystallization time and 170oC crystallization temperature. Effect of gel composition on separation factor and water flux of the water-UDMH mixtures was investigated. X-ray diffraction XRD patterns showed that mordenite is the only zeolite material which presents in the membrane. Morphology of the supports subjected to crystallization was characterized by Scanning Electron Microscopy SEM. In PV of the water-UDMH mixtures the membrane exhibits a hydrophilic behavior with a high selectivity towards water and a good flux. The best membranes had a water flux of 2.67 kgm2.h at 27oC. The best PV selectivity was obtained to be 264. A comprehensive unsteady state model was also developed for pervaporation of water-UDMH mixture by COMSOL Multiphysics 5.2 software based on solving continuity and momentum equations simultaneously. COMSOL solves Navier-Stokes equations by finite element method FEM. The 2D model was capable of predicting concentration in feed and membrane sections and velocity distribution in feed compartment.