Preparation of Membrane Humidifier using Nanotechnology to Humidify Hydrogen and Oxygen in Fuel Cells

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Samimi, Armin | 2010

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 41331 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Roosta Azad, Reza; Moosavi, Abbas
Abstract:
Polysulfone (PSU) and polyethersulfone (PES) porous membranes; and mixed polymers (PSU and PES) with nanoparticles TiO2, were prepared for air humidification. The mechanical properties and morphology of these membranes were studied by Tensile Tester and SEM/EDX. The effects of membrane composition and operating factors on humidifier performance were investigated. The results revealed that the membrane composition and its structure have significant effect on humidification. The porous membranes with finger type cavities had higher humidification performance but lower mechanical properties. The Membranes which were prepared from polysulfone polymer, 10 wt % of polymers in casting solution and N-methyl-2-pyrrolidone (NMP) solvent demonstrated more reasonable humidification results. Furthermore, adding 0.1wt% TiO2 nanoparticles to casting solution enhanced the humidification. Relative humidity of outlet gas was decreased by increasing the gas flow rate and pressure. An increase in water temperature caused the relative humidity of the outlet gas to decrease
Keywords:
Titanium Oxide ; Nanotechnology ; Fuel Cell ; Membrane Humidifier ; Porous Membrane

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