Development Of Palladium Impregnated Titania Membrane To Enhance Hydrogen Permeability
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Date
2011-07
Authors
Tamar Jaya, Muhammad Azan
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
The current study has been conducted to develop a ceramic membrane combined with palladium metal that offers great affinity towards hydrogen to improve the selectivity. In order to obtain the highest permeability, TiO2 ceramic which has low tortuosity compared to other ceramic materials was utilized. The study focused on the synthesis and characterization of TiO2 membrane with the impregnation of elemental palladium (Pd-TiO2 membrane). The introduction of Pd element into the TiO2 membrane was done by sol-mixing between the titania sol and Pd precursor solution. The membrane microstructure and morphology were analyzed using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Thermal Gravimetric analysis (TGA), Fourier Transform Infra Red (FTIR) analysis, Energy Dispersive X-ray (EDX), N2 adsorption/desorption, and Atomic Force Microscopy (AFM). The effects of several important parameters to obtain a crack-free Pd-TiO2 membrane were thoroughly investigated which were the effect of H+/Ti4+ molar ratio, calcination temperature, sol concentration, binders, and palladium concentration. The optimum molar ratio of H+/Ti4+ was found to be 0.5. At this level, the produced sol was found to be stable for a very long period of time with the best performance in coating. In term of thermal treatment, the phase transition of anatase to rutile began after 400oC. Sol concentration was also found to affect the production of crack-free Pd-TiO2 membrane where higher sol concentration caused the membrane to crack after calcination. Binder usage has been successfully minimized without causing the membrane to crack after calcination.
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Keywords
Palladium Impregnated Titania Membrane , Hydrogen Permeability