Abstract
In this research, porous inorganic membranes for hydrogen separation were prepared with α-alumina support by multi-step pore modification method. Porous inorganic membranes were made by three consecutive steps: sol-gel method,in-situ hydrolysis of tetraethylorthosilicate (TEOS) and soaking and vapor deposition (SVD) method. In order to enhance the hydrogen selectivity, we used nickel (Ni) and palladium (Pd) particles in the first and final pore modification steps. Although both nickel and palladium induced surface diffusion, palladium was shown more effective for hydrogen selective adsorption than nickel. This multi-step method produced porous membranes with a moderate hydrogen selectivity and excellent hydrogen permeability at high temperature up to 773 K and at transmembrane pressure (ΔP) as high as 310 kPa. The separation factor of hydrogen relative to nitrogen was maintained at about 7 even when the transmembrane pressure was 70 kPa, and the hydrogen permeability was still much higher than that of non-porous polymeric membranes. Furthermore, the distributions of nickel and palladium within the intermediate layer formed at the membrane cross-section were examined by scanning electron microscopy (SEM) and energy dispersive X-ray analysis.
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Aoki, K., Yokoyama, S., Kusakabe, K. and Morooka, S., “Preparation of Supported Palladium Membrane and Separation of Hydrogen,”Korean J. Chem. Eng.,13, 530 (1996).
Chai, M., Yamashita, Y., Machida, M., Eguchi, K. and Arai, H., “Preparation and Characterization of Metal-Dispersed Alumina Membranes for Selective Separation of Hydrogen,”J. Memb. Sci.,97, 199 (1994).
Cho, Y.-K., Han, K. W. and Lee, K.-H., “Separation of CO2 by Modified γ-A12O3 Membranes at High Temperature,”J. Memb. Sci.,104, 219 (1995).
Hartel, G., Rompf, F. and Puschel, T., “Separation of a CO2/H2 Gas Mixture under High Pressure with Polyethylene Terephthalate Membranes,”J. Memb. Sci.,113, 115 (1996).
Lange, de. R. S. A., Keizer, K. and Burggraaf, A. J., “Analysis and Theory of Gas Transport in Microporous Sol-Gel Derived Ceramic Membrane,”J. Memb. Sci.,104, 81 (1995).
Lee, K.-H., Cho, Y.-K. and Han, K. W., Manufacture of Alumina Composite Membranes for CO2 Separation,”HWAHAK KONGHAK,33, 570 (1995a).
Lee, S.-J., Cho, I. H., Kim, K. Y., Yang, S.-M. and Park, S. B., “Preparation and Characterization of Pd/Al2O3 Composite Mem-brane Supported on Porous Alumina Tube by Sol-Gel Method,”HWAHAK KONGHAK,33, 29 (1995b).
Lee, S.-J., Yang, S.-M. and Park, S. B., “Synthesis of Palladium Impregnated Alumina Membrane for Hydrogen Separation,”J. Memb. Sci.,96, 223 (1994).
Lee, S.-Y., Lee, S.-J., Kwon, S.-J., Yang, S.-M. and Park, S. B., Preparation of Sol-Gel Driven Alumina Membrane Modified by Soaking and Vapor Deposition Method,”J. Memb. Sci.,108, 97 (1995c).
Leenarrs, A. F. M., Keizer, K. and Burggraaf, A. J., “The Preparation and Characterization of Alumina Membranes with Ultra-Fine Pores-Part 1. Microstructural Investigations on Non-Supported Membranes,”J. Mater. Sci.,19, 1077 (1984).
Li, D. and Hwang, S. T., “Preparation and Characterization of Silicon Based Inorganic Membrane for Gas Separation,”J. Memb. Sci.,59, 331 (1991).
Matsuyama, H., Teramoto, M. and Sakakura, H., “Selective Premeative of CO2 through Poly(2-(N,N-dimethyl)aminoethyl methacrylate) Membrane Prepared by Plasma-Graft Polymerization,”J. Memb. Sci.,114, 193 (1996).
Robeson, L. M., “Correlation of Separation Factor Versus Permeance for Polymeric Membrane,”J. Memb. Sci.,62, 165 (1991).
So, J.-H., Yang, S.-M. and Park, S. B., “Preparation of Silica-Alumina Composite Membranes for Hydrogen Separation by Multi-Step Pore Modifications,”J. Memb. Sci.,147, 147 (1998).
Uhlhorm, R. J. R., Keizer, K. and Burrggaaf, A. J., “Gas and Surface Diffusion in Modified γ-Alumina Systems,”J. Memb. Sci.,46, 225 (1989).
Yoon, K.-Y., “Preparation of Alumina Membrane via Multistep Pore Modification and Hydrogen Separation Characteristics,” M.S. Thesis, KAIST (1996).
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So, JH., Yoon, KY., Yang, SM. et al. Preparations of metal impregnated porous inorganic membranes for hydrogen separation by multi-step pore modifications. Korean J. Chem. Eng. 16, 180–186 (1999). https://doi.org/10.1007/BF02706834
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DOI: https://doi.org/10.1007/BF02706834